** the version number) and changes its name to "sqlite3.h" as
** part of the build process.
**
-** @(#) $Id: sqlite.h.in,v 1.278 2007/12/13 21:54:11 drh Exp $
+** @(#) $Id: sqlite.h.in,v 1.291 2008/03/08 12:37:31 drh Exp $
*/
#ifndef _SQLITE3_H_
#define _SQLITE3_H_
/*
** CAPI3REF: Compile-Time Library Version Numbers {F10010}
**
-** {F10011} The #define in the sqlite3.h header file named
-** SQLITE_VERSION resolves to a string literal that identifies
-** the version of the SQLite library in the format "X.Y.Z", where
-** X is the major version number, Y is the minor version number and Z
-** is the release number. The X.Y.Z might be followed by "alpha" or "beta".
-** {END} For example "3.1.1beta".
-**
-** The X value is always 3 in SQLite. The X value only changes when
-** backwards compatibility is broken and we intend to never break
-** backwards compatibility. The Y value only changes when
+** The SQLITE_VERSION and SQLITE_VERSION_NUMBER #defines in
+** the sqlite3.h file specify the version of SQLite with which
+** that header file is associated.
+**
+** The "version" of SQLite is a string of the form "X.Y.Z".
+** The phrase "alpha" or "beta" might be appended after the Z.
+** The X value is major version number always 3 in SQLite3.
+** The X value only changes when backwards compatibility is
+** broken and we intend to never break
+** backwards compatibility. The Y value is the minor version
+** number and only changes when
** there are major feature enhancements that are forwards compatible
-** but not backwards compatible. The Z value is incremented with
+** but not backwards compatible. The Z value is release number
+** and is incremented with
** each release but resets back to 0 when Y is incremented.
**
-** {F10014} The SQLITE_VERSION_NUMBER #define resolves to an integer
-** with the value (X*1000000 + Y*1000 + Z) where X, Y, and Z are as
-** with SQLITE_VERSION. {END} For example, for version "3.1.1beta",
-** SQLITE_VERSION_NUMBER is set to 3001001. To detect if they are using
-** version 3.1.1 or greater at compile time, programs may use the test
-** (SQLITE_VERSION_NUMBER>=3001001).
-**
** See also: [sqlite3_libversion()] and [sqlite3_libversion_number()].
+**
+** INVARIANTS:
+**
+** {F10011} The SQLITE_VERSION #define in the sqlite3.h header file
+** evaluates to a string literal that is the SQLite version
+** with which the header file is associated.
+**
+** {F10014} The SQLITE_VERSION_NUMBER #define resolves to an integer
+** with the value (X*1000000 + Y*1000 + Z) where X, Y, and
+** Z are the major version, minor version, and release number.
*/
-#define SQLITE_VERSION "3.5.4"
-#define SQLITE_VERSION_NUMBER 3005004
+#define SQLITE_VERSION "3.5.7"
+#define SQLITE_VERSION_NUMBER 3005007
/*
** CAPI3REF: Run-Time Library Version Numbers {F10020}
+** KEYWORDS: sqlite3_version
**
-** {F10021} The sqlite3_libversion_number() interface returns an integer
-** equal to [SQLITE_VERSION_NUMBER]. {END} The value returned
-** by this routine should only be different from the header values
-** if the application is compiled using an sqlite3.h header from a
-** different version of SQLite than library. Cautious programmers might
+** These features provide the same information as the [SQLITE_VERSION]
+** and [SQLITE_VERSION_NUMBER] #defines in the header, but are associated
+** with the library instead of the header file. Cautious programmers might
** include a check in their application to verify that
** sqlite3_libversion_number() always returns the value
** [SQLITE_VERSION_NUMBER].
**
-** {F10022} The sqlite3_version[] string constant contains the text of the
-** [SQLITE_VERSION] string. {F10023} The sqlite3_libversion() function returns
-** a pointer to the sqlite3_version[] string constant. {END} The
-** sqlite3_libversion() function
-** is provided for DLL users who can only access functions and not
+** The sqlite3_libversion() function returns the same information as is
+** in the sqlite3_version[] string constant. The function is provided
+** for use in DLLs since DLL users usually do not have direct access to string
** constants within the DLL.
+**
+** INVARIANTS:
+**
+** {F10021} The [sqlite3_libversion_number()] interface returns an integer
+** equal to [SQLITE_VERSION_NUMBER].
+**
+** {F10022} The [sqlite3_version] string constant contains the text of the
+** [SQLITE_VERSION] string.
+**
+** {F10023} The [sqlite3_libversion()] function returns
+** a pointer to the [sqlite3_version] string constant.
*/
SQLITE_EXTERN const char sqlite3_version[];
const char *sqlite3_libversion(void);
/*
** CAPI3REF: Test To See If The Library Is Threadsafe {F10100}
**
-** {F10101} The sqlite3_threadsafe() routine returns nonzero
-** if SQLite was compiled with its mutexes enabled or zero if
-** SQLite was compiled with mutexes disabled. {END} If this
-** routine returns false, then it is not safe for simultaneously
-** running threads to both invoke SQLite interfaces.
-**
-** Really all this routine does is return true if SQLite was
-** compiled with the -DSQLITE_THREADSAFE=1 option and false if
-** compiled with -DSQLITE_THREADSAFE=0. If SQLite uses an
-** application-defined mutex subsystem, malloc subsystem, collating
-** sequence, VFS, SQL function, progress callback, commit hook,
-** extension, or other accessories and these add-ons are not
-** threadsafe, then clearly the combination will not be threadsafe
-** either. Hence, this routine never reports that the library
-** is guaranteed to be threadsafe, only when it is guaranteed not
-** to be.
+** SQLite can be compiled with or without mutexes. When
+** the SQLITE_THREADSAFE C preprocessor macro is true, mutexes
+** are enabled and SQLite is threadsafe. When that macro is false,
+** the mutexes are omitted. Without the mutexes, it is not safe
+** to use SQLite from more than one thread.
+**
+** There is a measurable performance penalty for enabling mutexes.
+** So if speed is of utmost importance, it makes sense to disable
+** the mutexes. But for maximum safety, mutexes should be enabled.
+** The default behavior is for mutexes to be enabled.
+**
+** This interface can be used by a program to make sure that the
+** version of SQLite that it is linking against was compiled with
+** the desired setting of the SQLITE_THREADSAFE macro.
+**
+** INVARIANTS:
+**
+** {F10101} The [sqlite3_threadsafe()] function returns nonzero if
+** SQLite was compiled with its mutexes enabled or zero
+** if SQLite was compiled with mutexes disabled.
*/
int sqlite3_threadsafe(void);
/*
** CAPI3REF: Database Connection Handle {F12000}
+** KEYWORDS: {database connection}
**
** Each open SQLite database is represented by pointer to an instance of the
** opaque structure named "sqlite3". It is useful to think of an sqlite3
/*
** CAPI3REF: 64-Bit Integer Types {F10200}
+** KEYWORDS: sqlite_int64 sqlite_uint64
**
-** Because there is no cross-platform way to specify such types
+** Because there is no cross-platform way to specify 64-bit integer types
** SQLite includes typedefs for 64-bit signed and unsigned integers.
-** {F10201} The sqlite_int64 and sqlite3_int64 types specify a
-** 64-bit signed integer. {F10202} The sqlite_uint64 and
-** sqlite3_uint64 types specify a 64-bit unsigned integer. {END}
**
** The sqlite3_int64 and sqlite3_uint64 are the preferred type
** definitions. The sqlite_int64 and sqlite_uint64 types are
** supported for backwards compatibility only.
+**
+** INVARIANTS:
+**
+** {F10201} The [sqlite_int64] and [sqlite3_int64] types specify a
+** 64-bit signed integer.
+**
+** {F10202} The [sqlite_uint64] and [sqlite3_uint64] types specify
+** a 64-bit unsigned integer.
*/
#ifdef SQLITE_INT64_TYPE
typedef SQLITE_INT64_TYPE sqlite_int64;
/*
** CAPI3REF: Closing A Database Connection {F12010}
**
-** {F12011} The sqlite3_close() interfaces destroys an [sqlite3] object
-** allocated by a prior call to [sqlite3_open()], [sqlite3_open16()], or
-** [sqlite3_open_v2()]. {F12012} Sqlite3_close() releases all
-** memory used by the connection and closes all open files. {END}.
+** This routine is the destructor for the [sqlite3] object.
+**
+** Applications should [sqlite3_finalize | finalize] all
+** [prepared statements] and
+** [sqlite3_blob_close | close] all [sqlite3_blob | BLOBs]
+** associated with the [sqlite3] object prior
+** to attempting to close the [sqlite3] object.
+**
+** <todo>What happens to pending transactions? Are they
+** rolled back, or abandoned?</todo>
+**
+** INVARIANTS:
+**
+** {F12011} The [sqlite3_close()] interface destroys an [sqlite3] object
+** allocated by a prior call to [sqlite3_open()],
+** [sqlite3_open16()], or [sqlite3_open_v2()].
+**
+** {F12012} The [sqlite3_close()] function releases all memory used by the
+** connection and closes all open files.
**
** {F12013} If the database connection contains
-** [sqlite3_stmt | prepared statements] that have not been finalized
-** by [sqlite3_finalize()], then sqlite3_close() returns SQLITE_BUSY
-** and leaves the connection open. {F12014} Giving sqlite3_close()
-** a NULL pointer is a harmless no-op. {END}
+** [prepared statements] that have not been
+** finalized by [sqlite3_finalize()], then [sqlite3_close()]
+** returns [SQLITE_BUSY] and leaves the connection open.
+**
+** {F12014} Giving sqlite3_close() a NULL pointer is a harmless no-op.
**
-** {U12015} Passing this routine a database connection that has already been
-** closed results in undefined behavior. {U12016} If other interfaces that
-** reference the same database connection are pending (either in the
-** same thread or in different threads) when this routine is called,
-** then the behavior is undefined and is almost certainly undesirable.
+** LIMITATIONS:
+**
+** {U12015} The parameter to [sqlite3_close()] must be an [sqlite3] object
+** pointer previously obtained from [sqlite3_open()] or the
+** equivalent, or NULL.
+**
+** {U12016} The parameter to [sqlite3_close()] must not have been previously
+** closed.
*/
int sqlite3_close(sqlite3 *);
/*
** CAPI3REF: One-Step Query Execution Interface {F12100}
**
-** {F12101} The sqlite3_exec() interface evaluates zero or more
-** UTF-8 encoded, semicolon-separated SQL statements in the zero-terminated
-** string of its second argument. {F12102} The SQL
-** statements are evaluated in the context of the database connection
-** specified by in the first argument.
-** {F12103} SQL statements are prepared one by one using
-** [sqlite3_prepare()] or the equivalent, evaluated
-** using one or more calls to [sqlite3_step()], then destroyed
-** using [sqlite3_finalize()]. {F12104} The return value of
-** sqlite3_exec() is SQLITE_OK if all SQL statement run
-** successfully.
-**
-** {F12105} If one or more of the SQL statements handed to
-** sqlite3_exec() are queries, then
-** the callback function specified by the 3rd parameter is
-** invoked once for each row of the query result. {F12106}
-** If the callback returns a non-zero value then the query
-** is aborted, all subsequent SQL statements
-** are skipped and the sqlite3_exec() function returns the [SQLITE_ABORT].
-**
-** {F12107} The 4th parameter to sqlite3_exec() is an arbitrary pointer
-** that is passed through to the callback function as its first parameter.
-**
-** {F12108} The 2nd parameter to the callback function is the number of
-** columns in the query result. {F12109} The 3rd parameter to the callback
-** is an array of pointers to strings holding the values for each column
-** as extracted using [sqlite3_column_text()]. NULL values in the result
-** set result in a NULL pointer. All other value are in their UTF-8
-** string representation. {F12117}
-** The 4th parameter to the callback is an array of strings
-** obtained using [sqlite3_column_name()] and holding
-** the names of each column, also in UTF-8.
-**
-** {F12110} The callback function may be NULL, even for queries. A NULL
-** callback is not an error. It just means that no callback
-** will be invoked.
-**
-** {F12112} If an error occurs while parsing or evaluating the SQL
-** then an appropriate error message is written into memory obtained
-** from [sqlite3_malloc()] and *errmsg is made to point to that message
-** assuming errmsg is not NULL.
-** {U12113} The calling function is responsible for freeing the memory
-** using [sqlite3_free()].
-** {F12116} If [sqlite3_malloc()] fails while attempting to generate
-** the error message, *errmsg is set to NULL.
-** {F12114} If errmsg is NULL then no attempt is made to generate an
-** error message. <todo>Is the return code SQLITE_NOMEM or the original
-** error code?</todo> <todo>What happens if there are multiple errors?
-** Do we get code for the first error, or is the choice of reported
-** error arbitrary?</todo>
-**
-** {F12115} The return value is is SQLITE_OK if there are no errors and
-** some other [SQLITE_OK | return code] if there is an error.
-** The particular return value depends on the type of error. {END}
+** The sqlite3_exec() interface is a convenient way of running
+** one or more SQL statements without a lot of C code. The
+** SQL statements are passed in as the second parameter to
+** sqlite3_exec(). The statements are evaluated one by one
+** until either an error or an interrupt is encountered or
+** until they are all done. The 3rd parameter is an optional
+** callback that is invoked once for each row of any query results
+** produced by the SQL statements. The 5th parameter tells where
+** to write any error messages.
+**
+** The sqlite3_exec() interface is implemented in terms of
+** [sqlite3_prepare_v2()], [sqlite3_step()], and [sqlite3_finalize()].
+** The sqlite3_exec() routine does nothing that cannot be done
+** by [sqlite3_prepare_v2()], [sqlite3_step()], and [sqlite3_finalize()].
+** The sqlite3_exec() is just a convenient wrapper.
+**
+** INVARIANTS:
+**
+** {F12101} The [sqlite3_exec()] interface evaluates zero or more UTF-8
+** encoded, semicolon-separated, SQL statements in the
+** zero-terminated string of its 2nd parameter within the
+** context of the [sqlite3] object given in the 1st parameter.
+**
+** {F12104} The return value of [sqlite3_exec()] is SQLITE_OK if all
+** SQL statements run successfully.
+**
+** {F12105} The return value of [sqlite3_exec()] is an appropriate
+** non-zero error code if any SQL statement fails.
+**
+** {F12107} If one or more of the SQL statements handed to [sqlite3_exec()]
+** return results and the 3rd parameter is not NULL, then
+** the callback function specified by the 3rd parameter is
+** invoked once for each row of result.
+**
+** {F12110} If the callback returns a non-zero value then [sqlite3_exec()]
+** will aborted the SQL statement it is currently evaluating,
+** skip all subsequent SQL statements, and return [SQLITE_ABORT].
+** <todo>What happens to *errmsg here? Does the result code for
+** sqlite3_errcode() get set?</todo>
+**
+** {F12113} The [sqlite3_exec()] routine will pass its 4th parameter through
+** as the 1st parameter of the callback.
+**
+** {F12116} The [sqlite3_exec()] routine sets the 2nd parameter of its
+** callback to be the number of columns in the current row of
+** result.
+**
+** {F12119} The [sqlite3_exec()] routine sets the 3rd parameter of its
+** callback to be an array of pointers to strings holding the
+** values for each column in the current result set row as
+** obtained from [sqlite3_column_text()].
+**
+** {F12122} The [sqlite3_exec()] routine sets the 4th parameter of its
+** callback to be an array of pointers to strings holding the
+** names of result columns as obtained from [sqlite3_column_name()].
+**
+** {F12125} If the 3rd parameter to [sqlite3_exec()] is NULL then
+** [sqlite3_exec()] never invokes a callback. All query
+** results are silently discarded.
+**
+** {F12128} If an error occurs while parsing or evaluating any of the SQL
+** statements handed to [sqlite3_exec()] then [sqlite3_exec()] will
+** return an [error code] other than [SQLITE_OK].
+**
+** {F12131} If an error occurs while parsing or evaluating any of the SQL
+** handed to [sqlite3_exec()] and if the 5th parameter (errmsg)
+** to [sqlite3_exec()] is not NULL, then an error message is
+** allocated using the equivalent of [sqlite3_mprintf()] and
+** *errmsg is made to point to that message.
+**
+** {F12134} The [sqlite3_exec()] routine does not change the value of
+** *errmsg if errmsg is NULL or if there are no errors.
+**
+** {F12137} The [sqlite3_exec()] function sets the error code and message
+** accessible via [sqlite3_errcode()], [sqlite3_errmsg()], and
+** [sqlite3_errmsg16()].
+**
+** LIMITATIONS:
+**
+** {U12141} The first parameter to [sqlite3_exec()] must be an valid and open
+** [database connection].
+**
+** {U12142} The database connection must not be closed while
+** [sqlite3_exec()] is running.
+**
+** {U12143} The calling function is should use [sqlite3_free()] to free
+** the memory that *errmsg is left pointing at once the error
+** message is no longer needed.
+**
+** {U12145} The SQL statement text in the 2nd parameter to [sqlite3_exec()]
+** must remain unchanged while [sqlite3_exec()] is running.
*/
int sqlite3_exec(
sqlite3*, /* An open database */
/*
** CAPI3REF: Result Codes {F10210}
-** KEYWORDS: SQLITE_OK
+** KEYWORDS: SQLITE_OK {error code} {error codes}
**
** Many SQLite functions return an integer result code from the set shown
-** above in order to indicates success or failure.
-**
-** {F10211} The result codes shown here are the only ones returned
-** by SQLite in its default configuration. {F10212} However, the
-** [sqlite3_extended_result_codes()] API can be used to set a database
-** connectoin to return more detailed result codes. {END}
+** here in order to indicates success or failure.
**
** See also: [SQLITE_IOERR_READ | extended result codes]
-**
*/
#define SQLITE_OK 0 /* Successful result */
/* beginning-of-error-codes */
/*
** CAPI3REF: Extended Result Codes {F10220}
+** KEYWORDS: {extended error code} {extended error codes}
+** KEYWORDS: {extended result codes}
**
** In its default configuration, SQLite API routines return one of 26 integer
** [SQLITE_OK | result codes]. However, experience has shown that
** much information about problems as programmers might like. In an effort to
** address this, newer versions of SQLite (version 3.3.8 and later) include
** support for additional result codes that provide more detailed information
-** about errors. {F10221} The extended result codes are enabled or disabled
+** about errors. The extended result codes are enabled or disabled
** for each database connection using the [sqlite3_extended_result_codes()]
-** API. {END}
+** API.
**
-** Some of the available extended result codes are listed above.
-** We expect the number of extended result codes will be expand
-** over time. {U10422} Software that uses extended result codes should expect
-** to see new result codes in future releases of SQLite. {END}
-**
-** {F10223} The symbolic name for an extended result code always contains
-** a related primary result code as a prefix. {F10224} Primary result
-** codes contain a single "_" character. {F10225} Extended result codes
-** contain two or more "_" characters. {F10226} The numeric value of an
-** extended result code can be converted to its
-** corresponding primary result code by masking off the lower 8 bytes. {END}
+** Some of the available extended result codes are listed here.
+** One may expect the number of extended result codes will be expand
+** over time. Software that uses extended result codes should expect
+** to see new result codes in future releases of SQLite.
**
** The SQLITE_OK result code will never be extended. It will always
** be exactly zero.
+**
+** INVARIANTS:
+**
+** {F10223} The symbolic name for an extended result code always contains
+** a related primary result code as a prefix.
+**
+** {F10224} Primary result code names contain a single "_" character.
+**
+** {F10225} Extended result code names contain two or more "_" characters.
+**
+** {F10226} The numeric value of an extended result code contains the
+** numeric value of its corresponding primary result code in
+** its least significant 8 bits.
*/
#define SQLITE_IOERR_READ (SQLITE_IOERR | (1<<8))
#define SQLITE_IOERR_SHORT_READ (SQLITE_IOERR | (2<<8))
/*
** CAPI3REF: Flags For File Open Operations {F10230}
**
-** {F10231} Some combination of the these bit values are used as the
-** third argument to the [sqlite3_open_v2()] interface and
-** as fourth argument to the xOpen method of the
+** These bit values are intended for use in the
+** 3rd parameter to the [sqlite3_open_v2()] interface and
+** in the 4th parameter to the xOpen method of the
** [sqlite3_vfs] object.
*/
#define SQLITE_OPEN_READONLY 0x00000001
/*
** CAPI3REF: Device Characteristics {F10240}
**
-** {F10241} The xDeviceCapabilities method of the [sqlite3_io_methods]
+** The xDeviceCapabilities method of the [sqlite3_io_methods]
** object returns an integer which is a vector of the these
** bit values expressing I/O characteristics of the mass storage
** device that holds the file that the [sqlite3_io_methods]
-** refers to. {END}
+** refers to.
**
-** {F10242} The SQLITE_IOCAP_ATOMIC property means that all writes of
-** any size are atomic. {F10243} The SQLITE_IOCAP_ATOMICnnn values
+** The SQLITE_IOCAP_ATOMIC property means that all writes of
+** any size are atomic. The SQLITE_IOCAP_ATOMICnnn values
** mean that writes of blocks that are nnn bytes in size and
** are aligned to an address which is an integer multiple of
-** nnn are atomic. {F10244} The SQLITE_IOCAP_SAFE_APPEND value means
+** nnn are atomic. The SQLITE_IOCAP_SAFE_APPEND value means
** that when data is appended to a file, the data is appended
** first then the size of the file is extended, never the other
-** way around. {F10245} The SQLITE_IOCAP_SEQUENTIAL property means that
+** way around. The SQLITE_IOCAP_SEQUENTIAL property means that
** information is written to disk in the same order as calls
** to xWrite().
*/
/*
** CAPI3REF: File Locking Levels {F10250}
**
-** {F10251} SQLite uses one of the following integer values as the second
+** SQLite uses one of these integer values as the second
** argument to calls it makes to the xLock() and xUnlock() methods
-** of an [sqlite3_io_methods] object. {END}
+** of an [sqlite3_io_methods] object.
*/
#define SQLITE_LOCK_NONE 0
#define SQLITE_LOCK_SHARED 1
/*
** CAPI3REF: Synchronization Type Flags {F10260}
**
-** {F10261} When SQLite invokes the xSync() method of an
-** [sqlite3_io_methods] object it uses a combination of the
+** When SQLite invokes the xSync() method of an
+** [sqlite3_io_methods] object it uses a combination of
** these integer values as the second argument.
**
-** {F10262} When the SQLITE_SYNC_DATAONLY flag is used, it means that the
+** When the SQLITE_SYNC_DATAONLY flag is used, it means that the
** sync operation only needs to flush data to mass storage. Inode
-** information need not be flushed. {F10263} The SQLITE_SYNC_NORMAL means
-** to use normal fsync() semantics. {F10264} The SQLITE_SYNC_FULL flag means
+** information need not be flushed. The SQLITE_SYNC_NORMAL flag means
+** to use normal fsync() semantics. The SQLITE_SYNC_FULL flag means
** to use Mac OS-X style fullsync instead of fsync().
*/
#define SQLITE_SYNC_NORMAL 0x00002
** CAPI3REF: OS Interface File Virtual Methods Object {F11120}
**
** Every file opened by the [sqlite3_vfs] xOpen method contains a pointer to
-** an instance of the this object. This object defines the
+** an instance of this object. This object defines the
** methods used to perform various operations against the open file.
**
** The flags argument to xSync may be one of [SQLITE_SYNC_NORMAL] or
** of the [sqlite3_io_methods] object and to the [sqlite3_file_control()]
** interface.
**
-** {F11311} The [SQLITE_FCNTL_LOCKSTATE] opcode is used for debugging. This
-** opcode cases the xFileControl method to write the current state of
+** The [SQLITE_FCNTL_LOCKSTATE] opcode is used for debugging. This
+** opcode causes the xFileControl method to write the current state of
** the lock (one of [SQLITE_LOCK_NONE], [SQLITE_LOCK_SHARED],
** [SQLITE_LOCK_RESERVED], [SQLITE_LOCK_PENDING], or [SQLITE_LOCK_EXCLUSIVE])
-** into an integer that the pArg argument points to. {F11312} This capability
+** into an integer that the pArg argument points to. This capability
** is used during testing and only needs to be supported when SQLITE_TEST
** is defined.
*/
** CAPI3REF: Mutex Handle {F17110}
**
** The mutex module within SQLite defines [sqlite3_mutex] to be an
-** abstract type for a mutex object. {F17111} The SQLite core never looks
-** at the internal representation of an [sqlite3_mutex]. {END} It only
+** abstract type for a mutex object. The SQLite core never looks
+** at the internal representation of an [sqlite3_mutex]. It only
** deals with pointers to the [sqlite3_mutex] object.
**
** Mutexes are created using [sqlite3_mutex_alloc()].
** structure used by this VFS. mxPathname is the maximum length of
** a pathname in this VFS.
**
-** Registered vfs modules are kept on a linked list formed by
+** Registered sqlite3_vfs objects are kept on a linked list formed by
** the pNext pointer. The [sqlite3_vfs_register()]
** and [sqlite3_vfs_unregister()] interfaces manage this list
** in a thread-safe way. The [sqlite3_vfs_find()] interface
** searches the list.
**
-** The pNext field is the only fields in the sqlite3_vfs
+** The pNext field is the only field in the sqlite3_vfs
** structure that SQLite will ever modify. SQLite will only access
** or modify this field while holding a particular static mutex.
** The application should never modify anything within the sqlite3_vfs
**
** The file I/O implementation can use the object type flags to
** changes the way it deals with files. For example, an application
-** that does not care about crash recovery or rollback, might make
-** the open of a journal file a no-op. Writes to this journal are
-** also a no-op. Any attempt to read the journal return SQLITE_IOERR.
-** Or the implementation might recognize the a database file will
-** be doing page-aligned sector reads and writes in a random order
-** and set up its I/O subsystem accordingly.
+** that does not care about crash recovery or rollback might make
+** the open of a journal file a no-op. Writes to this journal would
+** also be no-ops, and any attempt to read the journal would return
+** SQLITE_IOERR. Or the implementation might recognize that a database
+** file will be doing page-aligned sector reads and writes in a random
+** order and set up its I/O subsystem accordingly.
**
-** {F11144} SQLite might also add one of the following flags to the xOpen
+** SQLite might also add one of the following flags to the xOpen
** method:
**
** <ul>
** for exclusive access. This flag is set for all files except
** for the main database file. {END}
**
-** {F11148} At least szOsFile bytes of memory is allocated by SQLite
+** {F11148} At least szOsFile bytes of memory are allocated by SQLite
** to hold the [sqlite3_file] structure passed as the third
** argument to xOpen. {END} The xOpen method does not have to
** allocate the structure; it should just fill it in.
** to test to see if a file is at least readable. {END} The file can be a
** directory.
**
-** {F11150} SQLite will always allocate at least mxPathname+1 byte for
+** {F11150} SQLite will always allocate at least mxPathname+1 bytes for
** the output buffers for xGetTempname and xFullPathname. {F11151} The exact
** size of the output buffer is also passed as a parameter to both
** methods. {END} If the output buffer is not large enough, SQLITE_CANTOPEN
** The xRandomness() function attempts to return nBytes bytes
** of good-quality randomness into zOut. The return value is
** the actual number of bytes of randomness obtained. The
-** xSleep() method cause the calling thread to sleep for at
+** xSleep() method causes the calling thread to sleep for at
** least the number of microseconds given. The xCurrentTime()
** method returns a Julian Day Number for the current date and
** time.
**
** {F11191} These integer constants can be used as the third parameter to
** the xAccess method of an [sqlite3_vfs] object. {END} They determine
-** the kind of what kind of permissions the xAccess method is
+** what kind of permissions the xAccess method is
** looking for. {F11192} With SQLITE_ACCESS_EXISTS, the xAccess method
** simply checks to see if the file exists. {F11193} With
** SQLITE_ACCESS_READWRITE, the xAccess method checks to see
/*
** CAPI3REF: Enable Or Disable Extended Result Codes {F12200}
**
-** {F12201} The sqlite3_extended_result_codes() routine enables or disables the
-** [SQLITE_IOERR_READ | extended result codes] feature on a database
-** connection if its 2nd parameter is
-** non-zero or zero, respectively. {F12202}
-** By default, SQLite API routines return one of only 26 integer
-** [SQLITE_OK | result codes]. {F12203} When extended result codes
-** are enabled by this routine, the repetoire of result codes can be
-** much larger and can (hopefully) provide more detailed information
-** about the cause of an error.
+** The sqlite3_extended_result_codes() routine enables or disables the
+** [SQLITE_IOERR_READ | extended result codes] feature of SQLite.
+** The extended result codes are disabled by default for historical
+** compatibility.
**
-** {F12204} The second argument is a boolean value that turns extended result
-** codes on and off. {F12205} Extended result codes are off by default for
-** backwards compatibility with older versions of SQLite.
+** INVARIANTS:
+**
+** {F12201} Each new [database connection] has the
+** [extended result codes] feature
+** disabled by default.
+**
+** {F12202} The [sqlite3_extended_result_codes(D,F)] interface will enable
+** [extended result codes] for the
+** [database connection] D if the F parameter
+** is true, or disable them if F is false.
*/
int sqlite3_extended_result_codes(sqlite3*, int onoff);
/*
** CAPI3REF: Last Insert Rowid {F12220}
**
-** {F12221} Each entry in an SQLite table has a unique 64-bit signed
-** integer key called the "rowid". {F12222} The rowid is always available
+** Each entry in an SQLite table has a unique 64-bit signed
+** integer key called the "rowid". The rowid is always available
** as an undeclared column named ROWID, OID, or _ROWID_ as long as those
-** names are not also used by explicitly declared columns. {F12223} If
+** names are not also used by explicitly declared columns. If
** the table has a column of type INTEGER PRIMARY KEY then that column
-** is another an alias for the rowid.
+** is another alias for the rowid.
**
-** {F12224} This routine returns the rowid of the most recent
+** This routine returns the rowid of the most recent
** successful INSERT into the database from the database connection
-** shown in the first argument. {F12225} If no successful inserts
+** shown in the first argument. If no successful inserts
** have ever occurred on this database connection, zero is returned.
**
-** {F12226} If an INSERT occurs within a trigger, then the rowid of the
+** If an INSERT occurs within a trigger, then the rowid of the
** inserted row is returned by this routine as long as the trigger
-** is running. {F12227} But once the trigger terminates, the value returned
+** is running. But once the trigger terminates, the value returned
** by this routine reverts to the last value inserted before the
** trigger fired.
**
-** {F12228} An INSERT that fails due to a constraint violation is not a
+** An INSERT that fails due to a constraint violation is not a
** successful insert and does not change the value returned by this
-** routine. {F12229} Thus INSERT OR FAIL, INSERT OR IGNORE, INSERT OR ROLLBACK,
+** routine. Thus INSERT OR FAIL, INSERT OR IGNORE, INSERT OR ROLLBACK,
** and INSERT OR ABORT make no changes to the return value of this
-** routine when their insertion fails. {F12231} When INSERT OR REPLACE
+** routine when their insertion fails. When INSERT OR REPLACE
** encounters a constraint violation, it does not fail. The
** INSERT continues to completion after deleting rows that caused
** the constraint problem so INSERT OR REPLACE will always change
** the return value of this interface.
**
-** {UF12232} If another thread does a new insert on the same database connection
-** while this routine is running and thus changes the last insert rowid,
-** then the return value of this routine is undefined.
+** For the purposes of this routine, an insert is considered to
+** be successful even if it is subsequently rolled back.
+**
+** INVARIANTS:
+**
+** {F12221} The [sqlite3_last_insert_rowid()] function returns the
+** rowid of the most recent successful insert done
+** on the same database connection and within the same
+** trigger context, or zero if there have
+** been no qualifying inserts on that connection.
+**
+** {F12223} The [sqlite3_last_insert_rowid()] function returns
+** same value when called from the same trigger context
+** immediately before and after a ROLLBACK.
+**
+** LIMITATIONS:
+**
+** {U12232} If a separate thread does a new insert on the same
+** database connection while the [sqlite3_last_insert_rowid()]
+** function is running and thus changes the last insert rowid,
+** then the value returned by [sqlite3_last_insert_rowid()] is
+** unpredictable and might not equal either the old or the new
+** last insert rowid.
*/
sqlite3_int64 sqlite3_last_insert_rowid(sqlite3*);
/*
** CAPI3REF: Count The Number Of Rows Modified {F12240}
**
-** {F12241} This function returns the number of database rows that were changed
+** This function returns the number of database rows that were changed
** or inserted or deleted by the most recently completed SQL statement
-** on the connection specified by the first parameter. {F12242} Only
+** on the connection specified by the first parameter. Only
** changes that are directly specified by the INSERT, UPDATE, or
** DELETE statement are counted. Auxiliary changes caused by
-** triggers are not counted. {F12243} Use the [sqlite3_total_changes()] function
+** triggers are not counted. Use the [sqlite3_total_changes()] function
** to find the total number of changes including changes caused by triggers.
**
-** {F12244} Within the body of a trigger, the sqlite3_changes() interface
+** A "row change" is a change to a single row of a single table
+** caused by an INSERT, DELETE, or UPDATE statement. Rows that
+** are changed as side effects of REPLACE constraint resolution,
+** rollback, ABORT processing, DROP TABLE, or by any other
+** mechanisms do not count as direct row changes.
+**
+** A "trigger context" is a scope of execution that begins and
+** ends with the script of a trigger. Most SQL statements are
+** evaluated outside of any trigger. This is the "top level"
+** trigger context. If a trigger fires from the top level, a
+** new trigger context is entered for the duration of that one
+** trigger. Subtriggers create subcontexts for their duration.
+**
+** Calling [sqlite3_exec()] or [sqlite3_step()] recursively does
+** not create a new trigger context.
+**
+** This function returns the number of direct row changes in the
+** most recent INSERT, UPDATE, or DELETE statement within the same
+** trigger context.
+**
+** So when called from the top level, this function returns the
+** number of changes in the most recent INSERT, UPDATE, or DELETE
+** that also occurred at the top level.
+** Within the body of a trigger, the sqlite3_changes() interface
** can be called to find the number of
** changes in the most recently completed INSERT, UPDATE, or DELETE
** statement within the body of the same trigger.
+** However, the number returned does not include in changes
+** caused by subtriggers since they have their own context.
**
-** {F12245} All changes are counted, even if they are later undone by a
-** ROLLBACK or ABORT. {F12246} Except, changes associated with creating and
-** dropping tables are not counted.
-**
-** {F12247} If a callback invokes [sqlite3_exec()] or [sqlite3_step()]
-** recursively, then the changes in the inner, recursive call are
-** counted together with the changes in the outer call.
-**
-** {F12248} SQLite implements the command "DELETE FROM table" without
+** SQLite implements the command "DELETE FROM table" without
** a WHERE clause by dropping and recreating the table. (This is much
** faster than going through and deleting individual elements from the
-** table.) Because of this optimization, the change count for
-** "DELETE FROM table" will be zero regardless of the number of elements
-** that were originally in the table. {F12251} To get an accurate count
-** of the number of rows deleted, use
+** table.) Because of this optimization, the deletions in
+** "DELETE FROM table" are not row changes and will not be counted
+** by the sqlite3_changes() or [sqlite3_total_changes()] functions.
+** To get an accurate count of the number of rows deleted, use
** "DELETE FROM table WHERE 1" instead.
**
-** {UF12252} If another thread makes changes on the same database connection
-** while this routine is running then the return value of this routine
-** is undefined.
+** INVARIANTS:
+**
+** {F12241} The [sqlite3_changes()] function returns the number of
+** row changes caused by the most recent INSERT, UPDATE,
+** or DELETE statement on the same database connection and
+** within the same trigger context, or zero if there have
+** not been any qualifying row changes.
+**
+** LIMITATIONS:
+**
+** {U12252} If a separate thread makes changes on the same database connection
+** while [sqlite3_changes()] is running then the value returned
+** is unpredictable and unmeaningful.
*/
int sqlite3_changes(sqlite3*);
/*
** CAPI3REF: Total Number Of Rows Modified {F12260}
***
-** {F12261} This function returns the number of database rows that have been
-** modified by INSERT, UPDATE or DELETE statements since the database handle
-** was opened. {F12262} The count includes UPDATE, INSERT and DELETE
-** statements executed as part of trigger programs. {F12263} All changes
+** This function returns the number of row changes caused
+** by INSERT, UPDATE or DELETE statements since the database handle
+** was opened. The count includes all changes from all trigger
+** contexts. But the count does not include changes used to
+** implement REPLACE constraints, do rollbacks or ABORT processing,
+** or DROP table processing.
+** The changes
** are counted as soon as the statement that makes them is completed
** (when the statement handle is passed to [sqlite3_reset()] or
-** [sqlite3_finalize()]). {END}
-**
-** See also the [sqlite3_change()] interface.
+** [sqlite3_finalize()]).
**
-** {F12265} SQLite implements the command "DELETE FROM table" without
+** SQLite implements the command "DELETE FROM table" without
** a WHERE clause by dropping and recreating the table. (This is much
** faster than going
-** through and deleting individual elements form the table.) Because of
+** through and deleting individual elements from the table.) Because of
** this optimization, the change count for "DELETE FROM table" will be
** zero regardless of the number of elements that were originally in the
** table. To get an accurate count of the number of rows deleted, use
** "DELETE FROM table WHERE 1" instead.
**
-** {U12264} If another thread makes changes on the same database connection
-** while this routine is running then the return value of this routine
-** is undefined. {END}
+** See also the [sqlite3_changes()] interface.
+**
+** INVARIANTS:
+**
+** {F12261} The [sqlite3_total_changes()] returns the total number
+** of row changes caused by INSERT, UPDATE, and/or DELETE
+** statements on the same [database connection], in any
+** trigger context, since the database connection was
+** created.
+**
+** LIMITATIONS:
+**
+** {U12264} If a separate thread makes changes on the same database connection
+** while [sqlite3_total_changes()] is running then the value
+** returned is unpredictable and unmeaningful.
*/
int sqlite3_total_changes(sqlite3*);
/*
** CAPI3REF: Interrupt A Long-Running Query {F12270}
**
-** {F12271} This function causes any pending database operation to abort and
-** return at its earliest opportunity. {END} This routine is typically
+** This function causes any pending database operation to abort and
+** return at its earliest opportunity. This routine is typically
** called in response to a user action such as pressing "Cancel"
** or Ctrl-C where the user wants a long query operation to halt
** immediately.
**
-** {F12272} It is safe to call this routine from a thread different from the
-** thread that is currently running the database operation. {U12273} But it
+** It is safe to call this routine from a thread different from the
+** thread that is currently running the database operation. But it
** is not safe to call this routine with a database connection that
** is closed or might close before sqlite3_interrupt() returns.
**
** If an SQL is very nearly finished at the time when sqlite3_interrupt()
** is called, then it might not have an opportunity to be interrupted.
** It might continue to completion.
-** {F12274} The SQL operation that is interrupted will return
-** [SQLITE_INTERRUPT]. {F12275} If the interrupted SQL operation is an
+** An SQL operation that is interrupted will return
+** [SQLITE_INTERRUPT]. If the interrupted SQL operation is an
** INSERT, UPDATE, or DELETE that is inside an explicit transaction,
** then the entire transaction will be rolled back automatically.
-** {F12276} A call to sqlite3_interrupt() has no effect on SQL statements
+** A call to sqlite3_interrupt() has no effect on SQL statements
** that are started after sqlite3_interrupt() returns.
+**
+** INVARIANTS:
+**
+** {F12271} The [sqlite3_interrupt()] interface will force all running
+** SQL statements associated with the same database connection
+** to halt after processing at most one additional row of
+** data.
+**
+** {F12272} Any SQL statement that is interrupted by [sqlite3_interrupt()]
+** will return [SQLITE_INTERRUPT].
+**
+** LIMITATIONS:
+**
+** {U12279} If the database connection closes while [sqlite3_interrupt()]
+** is running then bad things will likely happen.
*/
void sqlite3_interrupt(sqlite3*);
** if additional input is needed before sending the text into
** SQLite for parsing. These routines return true if the input string
** appears to be a complete SQL statement. A statement is judged to be
-** complete if it ends with a semicolon and is not a fragment of a
-** CREATE TRIGGER statement. These routines do not parse the SQL and
+** complete if it ends with a semicolon token and is not a fragment of a
+** CREATE TRIGGER statement. Semicolons that are embedded within
+** string literals or quoted identifier names or comments are not
+** independent tokens (they are part of the token in which they are
+** embedded) and thus do not count as a statement terminator.
+**
+** These routines do not parse the SQL and
** so will not detect syntactically incorrect SQL.
**
-** {F10511} These functions return true if the given input string
-** ends with a semicolon optionally followed by whitespace or
-** comments. {F10512} For sqlite3_complete(),
-** the parameter must be a zero-terminated UTF-8 string. {F10513} For
-** sqlite3_complete16(), a zero-terminated machine byte order UTF-16 string
-** is required. {F10514} These routines return false if the terminal
-** semicolon is within a comment, a string literal or a quoted identifier
-** (in other words if the final semicolon is not really a separate token
-** but part of a larger token) or if the final semicolon is
-** in between the BEGIN and END keywords of a CREATE TRIGGER statement.
-** {END}
+** INVARIANTS:
+**
+** {F10511} The sqlite3_complete() and sqlite3_complete16() functions
+** return true (non-zero) if and only if the last
+** non-whitespace token in their input is a semicolon that
+** is not in between the BEGIN and END of a CREATE TRIGGER
+** statement.
+**
+** LIMITATIONS:
+**
+** {U10512} The input to sqlite3_complete() must be a zero-terminated
+** UTF-8 string.
+**
+** {U10513} The input to sqlite3_complete16() must be a zero-terminated
+** UTF-16 string in native byte order.
*/
int sqlite3_complete(const char *sql);
int sqlite3_complete16(const void *sql);
/*
** CAPI3REF: Register A Callback To Handle SQLITE_BUSY Errors {F12310}
**
-** {F12311} This routine identifies a callback function that might be
+** This routine identifies a callback function that might be
** invoked whenever an attempt is made to open a database table
** that another thread or process has locked.
-** {F12312} If the busy callback is NULL, then [SQLITE_BUSY]
+** If the busy callback is NULL, then [SQLITE_BUSY]
** or [SQLITE_IOERR_BLOCKED]
** is returned immediately upon encountering the lock.
-** {F12313} If the busy callback is not NULL, then the
-** callback will be invoked with two arguments. {F12314} The
+** If the busy callback is not NULL, then the
+** callback will be invoked with two arguments. The
** first argument to the handler is a copy of the void* pointer which
-** is the third argument to this routine. {F12315} The second argument to
+** is the third argument to this routine. The second argument to
** the handler is the number of times that the busy handler has
-** been invoked for this locking event. {F12316} If the
+** been invoked for this locking event. If the
** busy callback returns 0, then no additional attempts are made to
** access the database and [SQLITE_BUSY] or [SQLITE_IOERR_BLOCKED] is returned.
-** {F12317} If the callback returns non-zero, then another attempt
+** If the callback returns non-zero, then another attempt
** is made to open the database for reading and the cycle repeats.
**
** The presence of a busy handler does not guarantee that
-** it will be invoked when there is lock contention. {F12319}
+** it will be invoked when there is lock contention.
** If SQLite determines that invoking the busy handler could result in
** a deadlock, it will go ahead and return [SQLITE_BUSY] or
** [SQLITE_IOERR_BLOCKED] instead of invoking the
-** busy handler. {END}
+** busy handler.
** Consider a scenario where one process is holding a read lock that
** it is trying to promote to a reserved lock and
** a second process is holding a reserved lock that it is trying
** will induce the first process to release its read lock and allow
** the second process to proceed.
**
-** {F12321} The default busy callback is NULL. {END}
+** The default busy callback is NULL.
**
-** {F12322} The [SQLITE_BUSY] error is converted to [SQLITE_IOERR_BLOCKED]
+** The [SQLITE_BUSY] error is converted to [SQLITE_IOERR_BLOCKED]
** when SQLite is in the middle of a large transaction where all the
-** changes will not fit into the in-memory cache. {F12323} SQLite will
+** changes will not fit into the in-memory cache. SQLite will
** already hold a RESERVED lock on the database file, but it needs
** to promote this lock to EXCLUSIVE so that it can spill cache
** pages into the database file without harm to concurrent
-** readers. {F12324} If it is unable to promote the lock, then the in-memory
+** readers. If it is unable to promote the lock, then the in-memory
** cache will be left in an inconsistent state and so the error
** code is promoted from the relatively benign [SQLITE_BUSY] to
-** the more severe [SQLITE_IOERR_BLOCKED]. {F12325} This error code promotion
-** forces an automatic rollback of the changes. {END} See the
+** the more severe [SQLITE_IOERR_BLOCKED]. This error code promotion
+** forces an automatic rollback of the changes. See the
** <a href="http://www.sqlite.org/cvstrac/wiki?p=CorruptionFollowingBusyError">
** CorruptionFollowingBusyError</a> wiki page for a discussion of why
** this is important.
**
-** {F12326} Sqlite is re-entrant, so the busy handler may start a new
-** query. {END} (It is not clear why anyone would every want to do this,
-** but it is allowed, in theory.) {U12327} But the busy handler may not
-** close the database. Closing the database from a busy handler will delete
-** data structures out from under the executing query and will
-** probably result in a segmentation fault or other runtime error. {END}
-**
-** {F12328} There can only be a single busy handler defined for each database
+** There can only be a single busy handler defined for each database
** connection. Setting a new busy handler clears any previous one.
-** {F12329} Note that calling [sqlite3_busy_timeout()] will also set or clear
+** Note that calling [sqlite3_busy_timeout()] will also set or clear
** the busy handler.
**
-** {F12331} When operating in [sqlite3_enable_shared_cache | shared cache mode],
-** only a single busy handler can be defined for each database file.
-** So if two database connections share a single cache, then changing
-** the busy handler on one connection will also change the busy
-** handler in the other connection. {F12332} The busy handler is invoked
-** in the thread that was running when the lock contention occurs.
+** INVARIANTS:
+**
+** {F12311} The [sqlite3_busy_handler()] function replaces the busy handler
+** callback in the database connection identified by the 1st
+** parameter with a new busy handler identified by the 2nd and 3rd
+** parameters.
+**
+** {F12312} The default busy handler for new database connections is NULL.
+**
+** {F12314} When two or more database connection share a common cache,
+** the busy handler for the database connection currently using
+** the cache is invoked when the cache encounters a lock.
+**
+** {F12316} If a busy handler callback returns zero, then the SQLite
+** interface that provoked the locking event will return
+** [SQLITE_BUSY].
+**
+** {F12318} SQLite will invokes the busy handler with two argument which
+** are a copy of the pointer supplied by the 3rd parameter to
+** [sqlite3_busy_handler()] and a count of the number of prior
+** invocations of the busy handler for the same locking event.
+**
+** LIMITATIONS:
+**
+** {U12319} A busy handler should not call close the database connection
+** or prepared statement that invoked the busy handler.
*/
int sqlite3_busy_handler(sqlite3*, int(*)(void*,int), void*);
/*
** CAPI3REF: Set A Busy Timeout {F12340}
**
-** {F12341} This routine sets a [sqlite3_busy_handler | busy handler]
+** This routine sets a [sqlite3_busy_handler | busy handler]
** that sleeps for a while when a
-** table is locked. {F12342} The handler will sleep multiple times until
+** table is locked. The handler will sleep multiple times until
** at least "ms" milliseconds of sleeping have been done. {F12343} After
** "ms" milliseconds of sleeping, the handler returns 0 which
** causes [sqlite3_step()] to return [SQLITE_BUSY] or [SQLITE_IOERR_BLOCKED].
**
-** {F12344} Calling this routine with an argument less than or equal to zero
+** Calling this routine with an argument less than or equal to zero
** turns off all busy handlers.
**
-** {F12345} There can only be a single busy handler for a particular database
+** There can only be a single busy handler for a particular database
** connection. If another busy handler was defined
** (using [sqlite3_busy_handler()]) prior to calling
** this routine, that other busy handler is cleared.
+**
+** INVARIANTS:
+**
+** {F12341} The [sqlite3_busy_timeout()] function overrides any prior
+** [sqlite3_busy_timeout()] or [sqlite3_busy_handler()] setting
+** on the same database connection.
+**
+** {F12343} If the 2nd parameter to [sqlite3_busy_timeout()] is less than
+** or equal to zero, then the busy handler is cleared so that
+** all subsequent locking events immediately return [SQLITE_BUSY].
+**
+** {F12344} If the 2nd parameter to [sqlite3_busy_timeout()] is a positive
+** number N, then a busy handler is set that repeatedly calls
+** the xSleep() method in the VFS interface until either the
+** lock clears or until the cumulative sleep time reported back
+** by xSleep() exceeds N milliseconds.
*/
int sqlite3_busy_timeout(sqlite3*, int ms);
/*
** CAPI3REF: Convenience Routines For Running Queries {F12370}
**
-** This next routine is a convenience wrapper around [sqlite3_exec()].
-** {F12371} Instead of invoking a user-supplied callback for each row of the
-** result, this routine remembers each row of the result in memory
-** obtained from [sqlite3_malloc()], then returns all of the result after the
-** query has finished. {F12372}
+** Definition: A <b>result table</b> is memory data structure created by the
+** [sqlite3_get_table()] interface. A result table records the
+** complete query results from one or more queries.
+**
+** The table conceptually has a number of rows and columns. But
+** these numbers are not part of the result table itself. These
+** numbers are obtained separately. Let N be the number of rows
+** and M be the number of columns.
+**
+** A result table is an array of pointers to zero-terminated
+** UTF-8 strings. There are (N+1)*M elements in the array.
+** The first M pointers point to zero-terminated strings that
+** contain the names of the columns.
+** The remaining entries all point to query results. NULL
+** values are give a NULL pointer. All other values are in
+** their UTF-8 zero-terminated string representation as returned by
+** [sqlite3_column_text()].
**
-** As an example, suppose the query result where this table:
+** A result table might consists of one or more memory allocations.
+** It is not safe to pass a result table directly to [sqlite3_free()].
+** A result table should be deallocated using [sqlite3_free_table()].
+**
+** As an example of the result table format, suppose a query result
+** is as follows:
**
** <blockquote><pre>
** Name | Age
** Cindy | 21
** </pre></blockquote>
**
-** If the 3rd argument were &azResult then after the function returns
-** azResult will contain the following data:
+** There are two column (M==2) and three rows (N==3). Thus the
+** result table has 8 entries. Suppose the result table is stored
+** in an array names azResult. Then azResult holds this content:
**
** <blockquote><pre>
** azResult[0] = "Name";
** azResult[7] = "21";
** </pre></blockquote>
**
-** Notice that there is an extra row of data containing the column
-** headers. But the *nrow return value is still 3. *ncolumn is
-** set to 2. In general, the number of values inserted into azResult
-** will be ((*nrow) + 1)*(*ncolumn).
+** The sqlite3_get_table() function evaluates one or more
+** semicolon-separated SQL statements in the zero-terminated UTF-8
+** string of its 2nd parameter. It returns a result table to the
+** pointer given in its 3rd parameter.
**
-** {U12374} After the calling function has finished using the result, it should
-** pass the result data pointer to sqlite3_free_table() in order to
+** After the calling function has finished using the result, it should
+** pass the pointer to the result table to sqlite3_free_table() in order to
** release the memory that was malloc-ed. Because of the way the
-** [sqlite3_malloc()] happens, the calling function must not try to call
-** [sqlite3_free()] directly. Only [sqlite3_free_table()] is able to release
-** the memory properly and safely. {END}
-**
-** {F12373} The return value of this routine is the same as
-** from [sqlite3_exec()].
+** [sqlite3_malloc()] happens within sqlite3_get_table(), the calling
+** function must not try to call [sqlite3_free()] directly. Only
+** [sqlite3_free_table()] is able to release the memory properly and safely.
+**
+** The sqlite3_get_table() interface is implemented as a wrapper around
+** [sqlite3_exec()]. The sqlite3_get_table() routine does not have access
+** to any internal data structures of SQLite. It uses only the public
+** interface defined here. As a consequence, errors that occur in the
+** wrapper layer outside of the internal [sqlite3_exec()] call are not
+** reflected in subsequent calls to [sqlite3_errcode()] or
+** [sqlite3_errmsg()].
+**
+** INVARIANTS:
+**
+** {F12371} If a [sqlite3_get_table()] fails a memory allocation, then
+** it frees the result table under construction, aborts the
+** query in process, skips any subsequent queries, sets the
+** *resultp output pointer to NULL and returns [SQLITE_NOMEM].
+**
+** {F12373} If the ncolumn parameter to [sqlite3_get_table()] is not NULL
+** then [sqlite3_get_table()] write the number of columns in the
+** result set of the query into *ncolumn if the query is
+** successful (if the function returns SQLITE_OK).
+**
+** {F12374} If the nrow parameter to [sqlite3_get_table()] is not NULL
+** then [sqlite3_get_table()] write the number of rows in the
+** result set of the query into *nrow if the query is
+** successful (if the function returns SQLITE_OK).
+**
+** {F12376} The [sqlite3_get_table()] function sets its *ncolumn value
+** to the number of columns in the result set of the query in the
+** sql parameter, or to zero if the query in sql has an empty
+** result set.
*/
int sqlite3_get_table(
- sqlite3*, /* An open database */
- const char *sql, /* SQL to be executed */
- char ***resultp, /* Result written to a char *[] that this points to */
- int *nrow, /* Number of result rows written here */
- int *ncolumn, /* Number of result columns written here */
- char **errmsg /* Error msg written here */
+ sqlite3*, /* An open database */
+ const char *sql, /* SQL to be evaluated */
+ char ***pResult, /* Results of the query */
+ int *nrow, /* Number of result rows written here */
+ int *ncolumn, /* Number of result columns written here */
+ char **errmsg /* Error msg written here */
);
void sqlite3_free_table(char **result);
** These routines are workalikes of the "printf()" family of functions
** from the standard C library.
**
-** {F17401} The sqlite3_mprintf() and sqlite3_vmprintf() routines write their
+** The sqlite3_mprintf() and sqlite3_vmprintf() routines write their
** results into memory obtained from [sqlite3_malloc()].
-** {U17402} The strings returned by these two routines should be
-** released by [sqlite3_free()]. {F17403} Both routines return a
+** The strings returned by these two routines should be
+** released by [sqlite3_free()]. Both routines return a
** NULL pointer if [sqlite3_malloc()] is unable to allocate enough
** memory to hold the resulting string.
**
-** {F17404} In sqlite3_snprintf() routine is similar to "snprintf()" from
+** In sqlite3_snprintf() routine is similar to "snprintf()" from
** the standard C library. The result is written into the
** buffer supplied as the second parameter whose size is given by
-** the first parameter. {END} Note that the order of the
+** the first parameter. Note that the order of the
** first two parameters is reversed from snprintf(). This is an
** historical accident that cannot be fixed without breaking
-** backwards compatibility. {F17405} Note also that sqlite3_snprintf()
+** backwards compatibility. Note also that sqlite3_snprintf()
** returns a pointer to its buffer instead of the number of
-** characters actually written into the buffer. {END} We admit that
+** characters actually written into the buffer. We admit that
** the number of characters written would be a more useful return
** value but we cannot change the implementation of sqlite3_snprintf()
** now without breaking compatibility.
**
-** {F17406} As long as the buffer size is greater than zero, sqlite3_snprintf()
-** guarantees that the buffer is always zero-terminated. {F17407} The first
+** As long as the buffer size is greater than zero, sqlite3_snprintf()
+** guarantees that the buffer is always zero-terminated. The first
** parameter "n" is the total size of the buffer, including space for
-** the zero terminator. {END} So the longest string that can be completely
+** the zero terminator. So the longest string that can be completely
** written will be n-1 characters.
**
** These routines all implement some additional formatting
** All of the usual printf formatting options apply. In addition, there
** is are "%q", "%Q", and "%z" options.
**
-** {F17410} The %q option works like %s in that it substitutes a null-terminated
+** The %q option works like %s in that it substitutes a null-terminated
** string from the argument list. But %q also doubles every '\'' character.
-** %q is designed for use inside a string literal. {END} By doubling each '\''
+** %q is designed for use inside a string literal. By doubling each '\''
** character it escapes that character and allows it to be inserted into
** the string.
**
** should always use %q instead of %s when inserting text into a string
** literal.
**
-** {F17411} The %Q option works like %q except it also adds single quotes around
+** The %Q option works like %q except it also adds single quotes around
** the outside of the total string. Or if the parameter in the argument
** list is a NULL pointer, %Q substitutes the text "NULL" (without single
** quotes) in place of the %Q option. {END} So, for example, one could say:
** The code above will render a correct SQL statement in the zSQL
** variable even if the zText variable is a NULL pointer.
**
-** {F17412} The "%z" formatting option works exactly like "%s" with the
+** The "%z" formatting option works exactly like "%s" with the
** addition that after the string has been read and copied into
** the result, [sqlite3_free()] is called on the input string. {END}
+**
+** INVARIANTS:
+**
+** {F17403} The [sqlite3_mprintf()] and [sqlite3_vmprintf()] interfaces
+** return either pointers to zero-terminated UTF-8 strings held in
+** memory obtained from [sqlite3_malloc()] or NULL pointers if
+** a call to [sqlite3_malloc()] fails.
+**
+** {F17406} The [sqlite3_snprintf()] interface writes a zero-terminated
+** UTF-8 string into the buffer pointed to by the second parameter
+** provided that the first parameter is greater than zero.
+**
+** {F17407} The [sqlite3_snprintf()] interface does not writes slots of
+** its output buffer (the second parameter) outside the range
+** of 0 through N-1 (where N is the first parameter)
+** regardless of the length of the string
+** requested by the format specification.
+**
*/
char *sqlite3_mprintf(const char*,...);
char *sqlite3_vmprintf(const char*, va_list);
/*
** CAPI3REF: Memory Allocation Subsystem {F17300}
**
-** {F17301} The SQLite core uses these three routines for all of its own
-** internal memory allocation needs. {END} "Core" in the previous sentence
+** The SQLite core uses these three routines for all of its own
+** internal memory allocation needs. "Core" in the previous sentence
** does not include operating-system specific VFS implementation. The
** windows VFS uses native malloc and free for some operations.
**
-** {F17302} The sqlite3_malloc() routine returns a pointer to a block
+** The sqlite3_malloc() routine returns a pointer to a block
** of memory at least N bytes in length, where N is the parameter.
-** {F17303} If sqlite3_malloc() is unable to obtain sufficient free
-** memory, it returns a NULL pointer. {F17304} If the parameter N to
+** If sqlite3_malloc() is unable to obtain sufficient free
+** memory, it returns a NULL pointer. If the parameter N to
** sqlite3_malloc() is zero or negative then sqlite3_malloc() returns
** a NULL pointer.
**
-** {F17305} Calling sqlite3_free() with a pointer previously returned
+** Calling sqlite3_free() with a pointer previously returned
** by sqlite3_malloc() or sqlite3_realloc() releases that memory so
-** that it might be reused. {F17306} The sqlite3_free() routine is
+** that it might be reused. The sqlite3_free() routine is
** a no-op if is called with a NULL pointer. Passing a NULL pointer
-** to sqlite3_free() is harmless. {U17307} After being freed, memory
+** to sqlite3_free() is harmless. After being freed, memory
** should neither be read nor written. Even reading previously freed
** memory might result in a segmentation fault or other severe error.
-** {U17309} Memory corruption, a segmentation fault, or other severe error
+** Memory corruption, a segmentation fault, or other severe error
** might result if sqlite3_free() is called with a non-NULL pointer that
** was not obtained from sqlite3_malloc() or sqlite3_free().
**
-** {F17310} The sqlite3_realloc() interface attempts to resize a
+** The sqlite3_realloc() interface attempts to resize a
** prior memory allocation to be at least N bytes, where N is the
** second parameter. The memory allocation to be resized is the first
-** parameter. {F17311} If the first parameter to sqlite3_realloc()
+** parameter. If the first parameter to sqlite3_realloc()
** is a NULL pointer then its behavior is identical to calling
** sqlite3_malloc(N) where N is the second parameter to sqlite3_realloc().
-** {F17312} If the second parameter to sqlite3_realloc() is zero or
+** If the second parameter to sqlite3_realloc() is zero or
** negative then the behavior is exactly the same as calling
** sqlite3_free(P) where P is the first parameter to sqlite3_realloc().
-** {F17313} Sqlite3_realloc() returns a pointer to a memory allocation
+** Sqlite3_realloc() returns a pointer to a memory allocation
** of at least N bytes in size or NULL if sufficient memory is unavailable.
-** {F17314} If M is the size of the prior allocation, then min(N,M) bytes
+** If M is the size of the prior allocation, then min(N,M) bytes
** of the prior allocation are copied into the beginning of buffer returned
** by sqlite3_realloc() and the prior allocation is freed.
-** {F17315} If sqlite3_realloc() returns NULL, then the prior allocation
+** If sqlite3_realloc() returns NULL, then the prior allocation
** is not freed.
**
-** {F17316} The memory returned by sqlite3_malloc() and sqlite3_realloc()
+** The memory returned by sqlite3_malloc() and sqlite3_realloc()
** is always aligned to at least an 8 byte boundary. {END}
**
-** {F17381} The default implementation
+** The default implementation
** of the memory allocation subsystem uses the malloc(), realloc()
** and free() provided by the standard C library. {F17382} However, if
** SQLite is compiled with the following C preprocessor macro
** installation. Memory allocation errors are detected, but
** they are reported back as [SQLITE_CANTOPEN] or
** [SQLITE_IOERR] rather than [SQLITE_NOMEM].
+**
+** INVARIANTS:
+**
+** {F17303} The [sqlite3_malloc(N)] interface returns either a pointer to
+** newly checked-out block of at least N bytes of memory
+** that is 8-byte aligned,
+** or it returns NULL if it is unable to fulfill the request.
+**
+** {F17304} The [sqlite3_malloc(N)] interface returns a NULL pointer if
+** N is less than or equal to zero.
+**
+** {F17305} The [sqlite3_free(P)] interface releases memory previously
+** returned from [sqlite3_malloc()] or [sqlite3_realloc()],
+** making it available for reuse.
+**
+** {F17306} A call to [sqlite3_free(NULL)] is a harmless no-op.
+**
+** {F17310} A call to [sqlite3_realloc(0,N)] is equivalent to a call
+** to [sqlite3_malloc(N)].
+**
+** {F17312} A call to [sqlite3_realloc(P,0)] is equivalent to a call
+** to [sqlite3_free(P)].
+**
+** {F17315} The SQLite core uses [sqlite3_malloc()], [sqlite3_realloc()],
+** and [sqlite3_free()] for all of its memory allocation and
+** deallocation needs.
+**
+** {F17318} The [sqlite3_realloc(P,N)] interface returns either a pointer
+** to a block of checked-out memory of at least N bytes in size
+** that is 8-byte aligned, or a NULL pointer.
+**
+** {F17321} When [sqlite3_realloc(P,N)] returns a non-NULL pointer, it first
+** copies the first K bytes of content from P into the newly allocated
+** where K is the lessor of N and the size of the buffer P.
+**
+** {F17322} When [sqlite3_realloc(P,N)] returns a non-NULL pointer, it first
+** releases the buffer P.
+**
+** {F17323} When [sqlite3_realloc(P,N)] returns NULL, the buffer P is
+** not modified or released.
+**
+** LIMITATIONS:
+**
+** {U17350} The pointer arguments to [sqlite3_free()] and [sqlite3_realloc()]
+** must be either NULL or else a pointer obtained from a prior
+** invocation of [sqlite3_malloc()] or [sqlite3_realloc()] that has
+** not been released.
+**
+** {U17351} The application must not read or write any part of
+** a block of memory after it has been released using
+** [sqlite3_free()] or [sqlite3_realloc()].
+**
*/
void *sqlite3_malloc(int);
void *sqlite3_realloc(void*, int);
/*
** CAPI3REF: Memory Allocator Statistics {F17370}
**
-** In addition to the basic three allocation routines
-** [sqlite3_malloc()], [sqlite3_free()], and [sqlite3_realloc()],
-** the memory allocation subsystem included with the SQLite
-** sources provides the interfaces shown here.
-**
-** {F17371} The sqlite3_memory_used() routine returns the
-** number of bytes of memory currently outstanding (malloced but not freed).
-** {F17372} The value returned by sqlite3_memory_used() includes
-** any overhead added by SQLite, but not overhead added by the
-** library malloc() that backs the sqlite3_malloc() implementation.
-** {F17373} The sqlite3_memory_highwater() routines returns the
-** maximum number of bytes that have been outstanding at any time
-** since the highwater mark was last reset.
-** {F17374} The byte count returned by sqlite3_memory_highwater()
-** uses the same byte counting rules as sqlite3_memory_used(). {END}
-** In other words, overhead added internally by SQLite is counted,
-** but overhead from the underlying system malloc is not.
-** {F17375} If the parameter to sqlite3_memory_highwater() is true,
-** then the highwater mark is reset to the current value of
-** sqlite3_memory_used() and the prior highwater mark (before the
-** reset) is returned. {F17376} If the parameter to
-** sqlite3_memory_highwater() is zero, then the highwater mark is
-** unchanged.
+** SQLite provides these two interfaces for reporting on the status
+** of the [sqlite3_malloc()], [sqlite3_free()], and [sqlite3_realloc()]
+** the memory allocation subsystem included within the SQLite.
+**
+** INVARIANTS:
+**
+** {F17371} The [sqlite3_memory_used()] routine returns the
+** number of bytes of memory currently outstanding
+** (malloced but not freed).
+**
+** {F17373} The [sqlite3_memory_highwater()] routine returns the maximum
+** value of [sqlite3_memory_used()]
+** since the highwater mark was last reset.
+**
+** {F17374} The values returned by [sqlite3_memory_used()] and
+** [sqlite3_memory_highwater()] include any overhead
+** added by SQLite in its implementation of [sqlite3_malloc()],
+** but not overhead added by the any underlying system library
+** routines that [sqlite3_malloc()] may call.
+**
+** {F17375} The memory highwater mark is reset to the current value of
+** [sqlite3_memory_used()] if and only if the parameter to
+** [sqlite3_memory_highwater()] is true. The value returned
+** by [sqlite3_memory_highwater(1)] is the highwater mark
+** prior to the reset.
*/
sqlite3_int64 sqlite3_memory_used(void);
sqlite3_int64 sqlite3_memory_highwater(int resetFlag);
/*
** CAPI3REF: Compile-Time Authorization Callbacks {F12500}
**
-** {F12501} This routine registers a authorizer callback with a particular
-** database connection, supplied in the first argument. {F12502}
+** This routine registers a authorizer callback with a particular
+** database connection, supplied in the first argument.
** The authorizer callback is invoked as SQL statements are being compiled
** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()],
-** [sqlite3_prepare16()] and [sqlite3_prepare16_v2()]. {F12503} At various
+** [sqlite3_prepare16()] and [sqlite3_prepare16_v2()]. At various
** points during the compilation process, as logic is being created
** to perform various actions, the authorizer callback is invoked to
** see if those actions are allowed. The authorizer callback should
** return SQLITE_OK to allow the action, [SQLITE_IGNORE] to disallow the
** specific action but allow the SQL statement to continue to be
** compiled, or [SQLITE_DENY] to cause the entire SQL statement to be
-** rejected with an error. {F12504} If the authorizer callback returns
+** rejected with an error. If the authorizer callback returns
** any value other than [SQLITE_IGNORE], [SQLITE_OK], or [SQLITE_DENY]
** then [sqlite3_prepare_v2()] or equivalent call that triggered
-** the authorizer shall
-** fail with an SQLITE_ERROR error code and an appropriate error message. {END}
+** the authorizer will fail with an error message.
**
** When the callback returns [SQLITE_OK], that means the operation
-** requested is ok. {F12505} When the callback returns [SQLITE_DENY], the
+** requested is ok. When the callback returns [SQLITE_DENY], the
** [sqlite3_prepare_v2()] or equivalent call that triggered the
-** authorizer shall fail
-** with an SQLITE_ERROR error code and an error message explaining that
-** access is denied. {F12506} If the authorizer code (the 2nd parameter
-** to the authorizer callback is anything other than [SQLITE_READ], then
-** a return of [SQLITE_IGNORE] has the same effect as [SQLITE_DENY].
-** If the authorizer code is [SQLITE_READ] and the callback returns
-** [SQLITE_IGNORE] then the prepared statement is constructed to
-** insert a NULL value in place of the table column that would have
-** been read if [SQLITE_OK] had been returned. {END}
-**
-** {F12510} The first parameter to the authorizer callback is a copy of
+** authorizer will fail with an error message explaining that
+** access is denied. If the authorizer code is [SQLITE_READ]
+** and the callback returns [SQLITE_IGNORE] then the prepared
+** statement is constructed to insert a NULL value in place of
+** the table column that would have
+** been read if [SQLITE_OK] had been returned. The [SQLITE_IGNORE]
+** return can be used to deny an untrusted user access to individual
+** columns of a table.
+**
+** The first parameter to the authorizer callback is a copy of
** the third parameter to the sqlite3_set_authorizer() interface.
-** {F12511} The second parameter to the callback is an integer
+** The second parameter to the callback is an integer
** [SQLITE_COPY | action code] that specifies the particular action
-** to be authorized. {END} The available action codes are
-** [SQLITE_COPY | documented separately]. {F12512} The third through sixth
+** to be authorized. The third through sixth
** parameters to the callback are zero-terminated strings that contain
-** additional details about the action to be authorized. {END}
+** additional details about the action to be authorized.
**
** An authorizer is used when preparing SQL statements from an untrusted
** source, to ensure that the SQL statements do not try to access data
** user-entered SQL is being prepared that disallows everything
** except SELECT statements.
**
-** {F12520} Only a single authorizer can be in place on a database connection
+** Only a single authorizer can be in place on a database connection
** at a time. Each call to sqlite3_set_authorizer overrides the
-** previous call. {F12521} A NULL authorizer means that no authorization
-** callback is invoked. {F12522} The default authorizer is NULL. {END}
+** previous call. Disable the authorizer by installing a NULL callback.
+** The authorizer is disabled by default.
**
** Note that the authorizer callback is invoked only during
-** [sqlite3_prepare()] or its variants. {F12523} Authorization is not
-** performed during statement evaluation in [sqlite3_step()]. {END}
+** [sqlite3_prepare()] or its variants. Authorization is not
+** performed during statement evaluation in [sqlite3_step()].
+**
+** INVARIANTS:
+**
+** {F12501} The [sqlite3_set_authorizer(D,...)] interface registers a
+** authorizer callback with database connection D.
+**
+** {F12502} The authorizer callback is invoked as SQL statements are
+** being compiled
+**
+** {F12503} If the authorizer callback returns any value other than
+** [SQLITE_IGNORE], [SQLITE_OK], or [SQLITE_DENY] then
+** the [sqlite3_prepare_v2()] or equivalent call that caused
+** the authorizer callback to run shall fail with an
+** [SQLITE_ERROR] error code and an appropriate error message.
+**
+** {F12504} When the authorizer callback returns [SQLITE_OK], the operation
+** described is coded normally.
+**
+** {F12505} When the authorizer callback returns [SQLITE_DENY], the
+** [sqlite3_prepare_v2()] or equivalent call that caused the
+** authorizer callback to run shall fail
+** with an [SQLITE_ERROR] error code and an error message
+** explaining that access is denied.
+**
+** {F12506} If the authorizer code (the 2nd parameter to the authorizer
+** callback) is [SQLITE_READ] and the authorizer callback returns
+** [SQLITE_IGNORE] then the prepared statement is constructed to
+** insert a NULL value in place of the table column that would have
+** been read if [SQLITE_OK] had been returned.
+**
+** {F12507} If the authorizer code (the 2nd parameter to the authorizer
+** callback) is anything other than [SQLITE_READ], then
+** a return of [SQLITE_IGNORE] has the same effect as [SQLITE_DENY].
+**
+** {F12510} The first parameter to the authorizer callback is a copy of
+** the third parameter to the [sqlite3_set_authorizer()] interface.
+**
+** {F12511} The second parameter to the callback is an integer
+** [SQLITE_COPY | action code] that specifies the particular action
+** to be authorized.
+**
+** {F12512} The third through sixth parameters to the callback are
+** zero-terminated strings that contain
+** additional details about the action to be authorized.
+**
+** {F12520} Each call to [sqlite3_set_authorizer()] overrides the
+** any previously installed authorizer.
+**
+** {F12521} A NULL authorizer means that no authorization
+** callback is invoked.
+**
+** {F12522} The default authorizer is NULL.
*/
int sqlite3_set_authorizer(
sqlite3*,
** CAPI3REF: Authorizer Action Codes {F12550}
**
** The [sqlite3_set_authorizer()] interface registers a callback function
-** that is invoked to authorizer certain SQL statement actions. {F12551} The
+** that is invoked to authorizer certain SQL statement actions. The
** second parameter to the callback is an integer code that specifies
** what action is being authorized. These are the integer action codes that
-** the authorizer callback may be passed. {END}
+** the authorizer callback may be passed.
**
** These action code values signify what kind of operation is to be
-** authorized. {F12552} The 3rd and 4th parameters to the authorization
+** authorized. The 3rd and 4th parameters to the authorization
** callback function will be parameters or NULL depending on which of these
-** codes is used as the second parameter. {F12553} The 5th parameter to the
+** codes is used as the second parameter. The 5th parameter to the
** authorizer callback is the name of the database ("main", "temp",
-** etc.) if applicable. {F12554} The 6th parameter to the authorizer callback
+** etc.) if applicable. The 6th parameter to the authorizer callback
** is the name of the inner-most trigger or view that is responsible for
** the access attempt or NULL if this access attempt is directly from
** top-level SQL code.
+**
+** INVARIANTS:
+**
+** {F12551} The second parameter to an
+** [sqlite3_set_authorizer | authorizer callback is always an integer
+** [SQLITE_COPY | authorizer code] that specifies what action
+** is being authorized.
+**
+** {F12552} The 3rd and 4th parameters to the
+** [sqlite3_set_authorizer | authorization callback function]
+** will be parameters or NULL depending on which
+** [SQLITE_COPY | authorizer code] is used as the second parameter.
+**
+** {F12553} The 5th parameter to the
+** [sqlite3_set_authorizer | authorizer callback] is the name
+** of the database (example: "main", "temp", etc.) if applicable.
+**
+** {F12554} The 6th parameter to the
+** [sqlite3_set_authorizer | authorizer callback] is the name
+** of the inner-most trigger or view that is responsible for
+** the access attempt or NULL if this access attempt is directly from
+** top-level SQL code.
*/
/******************************************* 3rd ************ 4th ***********/
#define SQLITE_CREATE_INDEX 1 /* Index Name Table Name */
** These routines register callback functions that can be used for
** tracing and profiling the execution of SQL statements.
**
-** {F12281} The callback function registered by sqlite3_trace() is invoked
-** at the first [sqlite3_step()] for the evaluation of an SQL statement.
-** {F12282} Only a single trace callback can be registered at a time.
-** Each call to sqlite3_trace() overrides the previous. {F12283} A
-** NULL callback for sqlite3_trace() disables tracing. {F12284} The
-** first argument to the trace callback is a copy of the pointer which
-** was the 3rd argument to sqlite3_trace. {F12285} The second argument
-** to the trace callback is a zero-terminated UTF8 string containing
-** the original text of the SQL statement as it was passed into
-** [sqlite3_prepare_v2()] or the equivalent. {END} Note that the
-** host parameter are not expanded in the SQL statement text.
-**
-** {F12287} The callback function registered by sqlite3_profile() is invoked
-** as each SQL statement finishes. {F12288} The first parameter to the
-** profile callback is a copy of the 3rd parameter to sqlite3_profile().
-** {F12289} The second parameter to the profile callback is a
-** zero-terminated UTF-8 string that contains the complete text of
-** the SQL statement as it was processed by [sqlite3_prepare_v2()] or
-** the equivalent. {F12290} The third parameter to the profile
-** callback is an estimate of the number of nanoseconds of
-** wall-clock time required to run the SQL statement from start
-** to finish. {END}
+** The callback function registered by sqlite3_trace() is invoked at
+** various times when an SQL statement is being run by [sqlite3_step()].
+** The callback returns a UTF-8 rendering of the SQL statement text
+** as the statement first begins executing. Additional callbacks occur
+** as each triggersubprogram is entered. The callbacks for triggers
+** contain a UTF-8 SQL comment that identifies the trigger.
+**
+** The callback function registered by sqlite3_profile() is invoked
+** as each SQL statement finishes. The profile callback contains
+** the original statement text and an estimate of wall-clock time
+** of how long that statement took to run.
**
** The sqlite3_profile() API is currently considered experimental and
-** is subject to change.
+** is subject to change or removal in a future release.
+**
+** The trigger reporting feature of the trace callback is considered
+** experimental and is subject to change or removal in future releases.
+** Future versions of SQLite might also add new trace callback
+** invocations.
+**
+** INVARIANTS:
+**
+** {F12281} The callback function registered by [sqlite3_trace()] is
+** whenever an SQL statement first begins to execute and
+** whenever a trigger subprogram first begins to run.
+**
+** {F12282} Each call to [sqlite3_trace()] overrides the previously
+** registered trace callback.
+**
+** {F12283} A NULL trace callback disables tracing.
+**
+** {F12284} The first argument to the trace callback is a copy of
+** the pointer which was the 3rd argument to [sqlite3_trace()].
+**
+** {F12285} The second argument to the trace callback is a
+** zero-terminated UTF8 string containing the original text
+** of the SQL statement as it was passed into [sqlite3_prepare_v2()]
+** or the equivalent, or an SQL comment indicating the beginning
+** of a trigger subprogram.
+**
+** {F12287} The callback function registered by [sqlite3_profile()] is invoked
+** as each SQL statement finishes.
+**
+** {F12288} The first parameter to the profile callback is a copy of
+** the 3rd parameter to [sqlite3_profile()].
+**
+** {F12289} The second parameter to the profile callback is a
+** zero-terminated UTF-8 string that contains the complete text of
+** the SQL statement as it was processed by [sqlite3_prepare_v2()]
+** or the equivalent.
+**
+** {F12290} The third parameter to the profile callback is an estimate
+** of the number of nanoseconds of wall-clock time required to
+** run the SQL statement from start to finish.
*/
void *sqlite3_trace(sqlite3*, void(*xTrace)(void*,const char*), void*);
void *sqlite3_profile(sqlite3*,
/*
** CAPI3REF: Query Progress Callbacks {F12910}
**
-** {F12911} This routine configures a callback function - the
+** This routine configures a callback function - the
** progress callback - that is invoked periodically during long
** running calls to [sqlite3_exec()], [sqlite3_step()] and
-** [sqlite3_get_table()]. {END} An example use for this
+** [sqlite3_get_table()]. An example use for this
** interface is to keep a GUI updated during a large query.
**
+** If the progress callback returns non-zero, the opertion is
+** interrupted. This feature can be used to implement a
+** "Cancel" button on a GUI dialog box.
+**
+** INVARIANTS:
+**
+** {F12911} The callback function registered by [sqlite3_progress_handler()]
+** is invoked periodically during long running calls to
+** [sqlite3_step()].
+**
** {F12912} The progress callback is invoked once for every N virtual
-** machine opcodes, where N is the second argument to this function.
+** machine opcodes, where N is the second argument to
+** the [sqlite3_progress_handler()] call that registered
+** the callback. <todo>What if N is less than 1?</todo>
+**
** {F12913} The progress callback itself is identified by the third
-** argument to this function. {F12914} The fourth argument to this
-** function is a void pointer passed to the progress callback
-** function each time it is invoked. {END}
+** argument to [sqlite3_progress_handler()].
+**
+** {F12914} The fourth argument [sqlite3_progress_handler()] is a
+*** void pointer passed to the progress callback
+** function each time it is invoked.
**
-** {F12915} If a call to [sqlite3_exec()], [sqlite3_step()], or
-** [sqlite3_get_table()] results in fewer than N opcodes being executed,
-** then the progress callback is never invoked. {END}
+** {F12915} If a call to [sqlite3_step()] results in fewer than
+** N opcodes being executed,
+** then the progress callback is never invoked. {END}
**
-** {F12916} Only a single progress callback function may be registered for each
-** open database connection. Every call to sqlite3_progress_handler()
-** overwrites the results of the previous call. {F12917}
-** To remove the progress callback altogether, pass NULL as the third
-** argument to this function. {END}
+** {F12916} Every call to [sqlite3_progress_handler()]
+** overwrites any previously registere progress handler.
+**
+** {F12917} If the progress handler callback is NULL then no progress
+** handler is invoked.
**
** {F12918} If the progress callback returns a result other than 0, then
-** the current query is immediately terminated and any database changes
-** rolled back. {F12919}
-** The containing [sqlite3_exec()], [sqlite3_step()], or
-** [sqlite3_get_table()] call returns SQLITE_INTERRUPT. {END} This feature
-** can be used, for example, to implement the "Cancel" button on a
-** progress dialog box in a GUI.
+** the behavior is a if [sqlite3_interrupt()] had been called.
*/
void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*);
/*
** CAPI3REF: Opening A New Database Connection {F12700}
**
-** {F12701} These routines open an SQLite database file whose name
+** These routines open an SQLite database file whose name
** is given by the filename argument.
-** {F12702} The filename argument is interpreted as UTF-8
+** The filename argument is interpreted as UTF-8
** for [sqlite3_open()] and [sqlite3_open_v2()] and as UTF-16
** in the native byte order for [sqlite3_open16()].
-** {F12703} An [sqlite3*] handle is returned in *ppDb, even
-** if an error occurs. {F12723} (Exception: if SQLite is unable
+** An [sqlite3*] handle is usually returned in *ppDb, even
+** if an error occurs. The only exception is if SQLite is unable
** to allocate memory to hold the [sqlite3] object, a NULL will
-** be written into *ppDb instead of a pointer to the [sqlite3] object.)
-** {F12704} If the database is opened (and/or created)
-** successfully, then [SQLITE_OK] is returned. {F12705} Otherwise an
-** error code is returned. {F12706} The
+** be written into *ppDb instead of a pointer to the [sqlite3] object.
+** If the database is opened (and/or created)
+** successfully, then [SQLITE_OK] is returned. Otherwise an
+** error code is returned. The
** [sqlite3_errmsg()] or [sqlite3_errmsg16()] routines can be used to obtain
** an English language description of the error.
**
-** {F12707} The default encoding for the database will be UTF-8 if
+** The default encoding for the database will be UTF-8 if
** [sqlite3_open()] or [sqlite3_open_v2()] is called and
** UTF-16 in the native byte order if [sqlite3_open16()] is used.
**
-** {F12708} Whether or not an error occurs when it is opened, resources
+** Whether or not an error occurs when it is opened, resources
** associated with the [sqlite3*] handle should be released by passing it
** to [sqlite3_close()] when it is no longer required.
**
-** {F12709} The [sqlite3_open_v2()] interface works like [sqlite3_open()]
+** The [sqlite3_open_v2()] interface works like [sqlite3_open()]
** except that it acccepts two additional parameters for additional control
-** over the new database connection. {F12710} The flags parameter can be
+** over the new database connection. The flags parameter can be
** one of:
**
** <ol>
** <li> [SQLITE_OPEN_READWRITE] | [SQLITE_OPEN_CREATE]
** </ol>
**
-** {F12711} The first value opens the database read-only.
-** {F12712} If the database does not previously exist, an error is returned.
-** {F12713} The second option opens
+** The first value opens the database read-only.
+** If the database does not previously exist, an error is returned.
+** The second option opens
** the database for reading and writing if possible, or reading only if
-** if the file is write protected. {F12714} In either case the database
-** must already exist or an error is returned. {F12715} The third option
+** if the file is write protected. In either case the database
+** must already exist or an error is returned. The third option
** opens the database for reading and writing and creates it if it does
-** not already exist. {F12716}
+** not already exist.
** The third options is behavior that is always used for [sqlite3_open()]
** and [sqlite3_open16()].
**
-** {F12717} If the filename is ":memory:", then an private
-** in-memory database is created for the connection. {F12718} This in-memory
-** database will vanish when the database connection is closed. {END} Future
+** If the filename is ":memory:", then an private
+** in-memory database is created for the connection. This in-memory
+** database will vanish when the database connection is closed. Future
** version of SQLite might make use of additional special filenames
** that begin with the ":" character. It is recommended that
** when a database filename really does begin with
** ":" that you prefix the filename with a pathname like "./" to
** avoid ambiguity.
**
-** {F12719} If the filename is an empty string, then a private temporary
-** on-disk database will be created. {F12720} This private database will be
+** If the filename is an empty string, then a private temporary
+** on-disk database will be created. This private database will be
** automatically deleted as soon as the database connection is closed.
**
-** {F12721} The fourth parameter to sqlite3_open_v2() is the name of the
+** The fourth parameter to sqlite3_open_v2() is the name of the
** [sqlite3_vfs] object that defines the operating system
-** interface that the new database connection should use. {F12722} If the
+** interface that the new database connection should use. If the
** fourth parameter is a NULL pointer then the default [sqlite3_vfs]
-** object is used. {END}
+** object is used.
**
** <b>Note to windows users:</b> The encoding used for the filename argument
** of [sqlite3_open()] and [sqlite3_open_v2()] must be UTF-8, not whatever
** codepage is currently defined. Filenames containing international
** characters must be converted to UTF-8 prior to passing them into
** [sqlite3_open()] or [sqlite3_open_v2()].
+**
+** INVARIANTS:
+**
+** {F12701} The [sqlite3_open()], [sqlite3_open16()], and
+** [sqlite3_open_v2()] interfaces create a new
+** [database connection] associated with
+** the database file given in their first parameter.
+**
+** {F12702} The filename argument is interpreted as UTF-8
+** for [sqlite3_open()] and [sqlite3_open_v2()] and as UTF-16
+** in the native byte order for [sqlite3_open16()].
+**
+** {F12703} A successful invocation of [sqlite3_open()], [sqlite3_open16()],
+** or [sqlite3_open_v2()] writes a pointer to a new
+** [database connection] into *ppDb.
+**
+** {F12704} The [sqlite3_open()], [sqlite3_open16()], and
+** [sqlite3_open_v2()] interfaces return [SQLITE_OK] upon success,
+** or an appropriate [error code] on failure.
+**
+** {F12706} The default text encoding for a new database created using
+** [sqlite3_open()] or [sqlite3_open_v2()] will be UTF-8.
+**
+** {F12707} The default text encoding for a new database created using
+** [sqlite3_open16()] will be UTF-16.
+**
+** {F12709} The [sqlite3_open(F,D)] interface is equivalent to
+** [sqlite3_open_v2(F,D,G,0)] where the G parameter is
+** [SQLITE_OPEN_READWRITE]|[SQLITE_OPEN_CREATE].
+**
+** {F12711} If the G parameter to [sqlite3_open_v2(F,D,G,V)] contains the
+** bit value [SQLITE_OPEN_READONLY] then the database is opened
+** for reading only.
+**
+** {F12712} If the G parameter to [sqlite3_open_v2(F,D,G,V)] contains the
+** bit value [SQLITE_OPEN_READWRITE] then the database is opened
+** reading and writing if possible, or for reading only if the
+** file is write protected by the operating system.
+**
+** {F12713} If the G parameter to [sqlite3_open(v2(F,D,G,V)] omits the
+** bit value [SQLITE_OPEN_CREATE] and the database does not
+** previously exist, an error is returned.
+**
+** {F12714} If the G parameter to [sqlite3_open(v2(F,D,G,V)] contains the
+** bit value [SQLITE_OPEN_CREATE] and the database does not
+** previously exist, then an attempt is made to create and
+** initialize the database.
+**
+** {F12717} If the filename argument to [sqlite3_open()], [sqlite3_open16()],
+** or [sqlite3_open_v2()] is ":memory:", then an private,
+** ephemeral, in-memory database is created for the connection.
+** <todo>Is SQLITE_OPEN_CREATE|SQLITE_OPEN_READWRITE required
+** in sqlite3_open_v2()?</todo>
+**
+** {F12719} If the filename is NULL or an empty string, then a private,
+** ephermeral on-disk database will be created.
+** <todo>Is SQLITE_OPEN_CREATE|SQLITE_OPEN_READWRITE required
+** in sqlite3_open_v2()?</todo>
+**
+** {F12721} The [database connection] created by
+** [sqlite3_open_v2(F,D,G,V)] will use the
+** [sqlite3_vfs] object identified by the V parameter, or
+** the default [sqlite3_vfs] object is V is a NULL pointer.
*/
int sqlite3_open(
const char *filename, /* Database filename (UTF-8) */
/*
** CAPI3REF: Error Codes And Messages {F12800}
**
-** {F12801} The sqlite3_errcode() interface returns the numeric
+** The sqlite3_errcode() interface returns the numeric
** [SQLITE_OK | result code] or [SQLITE_IOERR_READ | extended result code]
** for the most recent failed sqlite3_* API call associated
-** with [sqlite3] handle 'db'. {U12802} If a prior API call failed but the
+** with [sqlite3] handle 'db'. If a prior API call failed but the
** most recent API call succeeded, the return value from sqlite3_errcode()
-** is undefined. {END}
+** is undefined.
**
-** {F12803} The sqlite3_errmsg() and sqlite3_errmsg16() return English-language
+** The sqlite3_errmsg() and sqlite3_errmsg16() return English-language
** text that describes the error, as either UTF8 or UTF16 respectively.
-** {F12804} Memory to hold the error message string is managed internally.
-** {U12805} The
-** string may be overwritten or deallocated by subsequent calls to SQLite
-** interface functions. {END}
-**
-** {F12806} Calls to many sqlite3_* functions set the error code and
-** string returned by [sqlite3_errcode()], [sqlite3_errmsg()], and
-** [sqlite3_errmsg16()] overwriting the previous values. {F12807}
-** Except, calls to [sqlite3_errcode()],
-** [sqlite3_errmsg()], and [sqlite3_errmsg16()] themselves do not affect the
-** results of future invocations. {F12808} Calls to API routines that
-** do not return an error code (example: [sqlite3_data_count()]) do not
-** change the error code returned by this routine. {F12809} Interfaces that
-** are not associated with a specific database connection (examples:
-** [sqlite3_mprintf()] or [sqlite3_enable_shared_cache()] do not change
-** the return code. {END}
-**
-** {F12810} Assuming no other intervening sqlite3_* API calls are made,
-** the error code returned by this function is associated with the same
-** error as the strings returned by [sqlite3_errmsg()] and [sqlite3_errmsg16()].
+** Memory to hold the error message string is managed internally.
+** The application does not need to worry with freeing the result.
+** However, the error string might be overwritten or deallocated by
+** subsequent calls to other SQLite interface functions.
+**
+** INVARIANTS:
+**
+** {F12801} The [sqlite3_errcode(D)] interface returns the numeric
+** [SQLITE_OK | result code] or
+** [SQLITE_IOERR_READ | extended result code]
+** for the most recently failed interface call associated
+** with [database connection] D.
+**
+** {F12803} The [sqlite3_errmsg(D)] and [sqlite3_errmsg16(D)]
+** interfaces return English-language text that describes
+** the error in the mostly recently failed interface call,
+** encoded as either UTF8 or UTF16 respectively.
+**
+** {F12807} The strings returned by [sqlite3_errmsg()] and [sqlite3_errmsg16()]
+** are valid until the next SQLite interface call.
+**
+** {F12808} Calls to API routines that do not return an error code
+** (example: [sqlite3_data_count()]) do not
+** change the error code or message returned by
+** [sqlite3_errcode()], [sqlite3_errmsg()], or [sqlite3_errmsg16()].
+**
+** {F12809} Interfaces that are not associated with a specific
+** [database connection] (examples:
+** [sqlite3_mprintf()] or [sqlite3_enable_shared_cache()]
+** do not change the values returned by
+** [sqlite3_errcode()], [sqlite3_errmsg()], or [sqlite3_errmsg16()].
*/
int sqlite3_errcode(sqlite3 *db);
const char *sqlite3_errmsg(sqlite3*);
/*
** CAPI3REF: SQL Statement Object {F13000}
+** KEYWORDS: {prepared statement} {prepared statements}
**
** An instance of this object represent single SQL statements. This
** object is variously known as a "prepared statement" or a
** To execute an SQL query, it must first be compiled into a byte-code
** program using one of these routines.
**
-** {F13011} The first argument "db" is an [sqlite3 | SQLite database handle]
+** The first argument "db" is an [database connection]
** obtained from a prior call to [sqlite3_open()], [sqlite3_open_v2()]
-** or [sqlite3_open16()]. {F13012}
+** or [sqlite3_open16()].
** The second argument "zSql" is the statement to be compiled, encoded
** as either UTF-8 or UTF-16. The sqlite3_prepare() and sqlite3_prepare_v2()
** interfaces uses UTF-8 and sqlite3_prepare16() and sqlite3_prepare16_v2()
** use UTF-16. {END}
**
-** {F13013} If the nByte argument is less
+** If the nByte argument is less
** than zero, then zSql is read up to the first zero terminator.
-** {F13014} If nByte is non-negative, then it is the maximum number of
+** If nByte is non-negative, then it is the maximum number of
** bytes read from zSql. When nByte is non-negative, the
** zSql string ends at either the first '\000' or '\u0000' character or
** until the nByte-th byte, whichever comes first. {END}
**
-** {F13015} *pzTail is made to point to the first byte past the end of the
+** *pzTail is made to point to the first byte past the end of the
** first SQL statement in zSql. These routines only compiles the first
** statement in zSql, so *pzTail is left pointing to what remains
-** uncompiled. {END}
+** uncompiled.
**
-** {F13016} *ppStmt is left pointing to a compiled
-** [sqlite3_stmt | SQL statement structure] that can be
-** executed using [sqlite3_step()]. Or if there is an error, *ppStmt may be
-** set to NULL. {F13017} If the input text contains no SQL (if the input
+** *ppStmt is left pointing to a compiled [prepared statement] that can be
+** executed using [sqlite3_step()]. Or if there is an error, *ppStmt is
+** set to NULL. If the input text contains no SQL (if the input
** is and empty string or a comment) then *ppStmt is set to NULL.
** {U13018} The calling procedure is responsible for deleting the
** compiled SQL statement
** using [sqlite3_finalize()] after it has finished with it.
**
-** {F13019} On success, [SQLITE_OK] is returned. Otherwise an
-** [SQLITE_ERROR | error code] is returned. {END}
+** On success, [SQLITE_OK] is returned. Otherwise an
+** [error code] is returned.
**
** The sqlite3_prepare_v2() and sqlite3_prepare16_v2() interfaces are
** recommended for all new programs. The two older interfaces are retained
** for backwards compatibility, but their use is discouraged.
-** {F13020} In the "v2" interfaces, the prepared statement
+** In the "v2" interfaces, the prepared statement
** that is returned (the [sqlite3_stmt] object) contains a copy of the
** original SQL text. {END} This causes the [sqlite3_step()] interface to
** behave a differently in two ways:
**
** <ol>
-** <li>{F13022}
+** <li>
** If the database schema changes, instead of returning [SQLITE_SCHEMA] as it
** always used to do, [sqlite3_step()] will automatically recompile the SQL
-** statement and try to run it again. {F12023} If the schema has changed in
+** statement and try to run it again. If the schema has changed in
** a way that makes the statement no longer valid, [sqlite3_step()] will still
-** return [SQLITE_SCHEMA]. {END} But unlike the legacy behavior,
-** [SQLITE_SCHEMA] is now a fatal error. {F12024} Calling
+** return [SQLITE_SCHEMA]. But unlike the legacy behavior,
+** [SQLITE_SCHEMA] is now a fatal error. Calling
** [sqlite3_prepare_v2()] again will not make the
-** error go away. {F12025} Note: use [sqlite3_errmsg()] to find the text
+** error go away. Note: use [sqlite3_errmsg()] to find the text
** of the parsing error that results in an [SQLITE_SCHEMA] return. {END}
** </li>
**
** <li>
-** {F13030} When an error occurs,
+** When an error occurs,
** [sqlite3_step()] will return one of the detailed
-** [SQLITE_ERROR | result codes] or
-** [SQLITE_IOERR_READ | extended result codes]. {F13031}
+** [error codes] or [extended error codes].
** The legacy behavior was that [sqlite3_step()] would only return a generic
** [SQLITE_ERROR] result code and you would have to make a second call to
** [sqlite3_reset()] in order to find the underlying cause of the problem.
-** {F13032}
** With the "v2" prepare interfaces, the underlying reason for the error is
-** returned immediately. {END}
+** returned immediately.
** </li>
** </ol>
+**
+** INVARIANTS:
+**
+** {F13011} The [sqlite3_prepare(db,zSql,...)] and
+** [sqlite3_prepare_v2(db,zSql,...)] interfaces interpret the
+** text in their zSql parameter as UTF-8.
+**
+** {F13012} The [sqlite3_prepare16(db,zSql,...)] and
+** [sqlite3_prepare16_v2(db,zSql,...)] interfaces interpret the
+** text in their zSql parameter as UTF-16 in the native byte order.
+**
+** {F13013} If the nByte argument to [sqlite3_prepare_v2(db,zSql,nByte,...)]
+** and its variants is less than zero, then SQL text is
+** read from zSql is read up to the first zero terminator.
+**
+** {F13014} If the nByte argument to [sqlite3_prepare_v2(db,zSql,nByte,...)]
+** and its variants is non-negative, then nBytes bytes
+** SQL text is read from zSql.
+**
+** {F13015} In [sqlite3_prepare_v2(db,zSql,N,P,pzTail)] and its variants
+** if the zSql input text contains more than one SQL statement
+** and pzTail is not NULL, then *pzTail is made to point to the
+** first byte past the end of the first SQL statement in zSql.
+** <todo>What does *pzTail point to if there is one statement?</todo>
+**
+** {F13016} A successful call to [sqlite3_prepare_v2(db,zSql,N,ppStmt,...)]
+** or one of its variants writes into *ppStmt a pointer to a new
+** [prepared statement] or a pointer to NULL
+** if zSql contains nothing other than whitespace or comments.
+**
+** {F13019} The [sqlite3_prepare_v2()] interface and its variants return
+** [SQLITE_OK] or an appropriate [error code] upon failure.
+**
+** {F13021} Before [sqlite3_prepare(db,zSql,nByte,ppStmt,pzTail)] or its
+** variants returns an error (any value other than [SQLITE_OK])
+** it first sets *ppStmt to NULL.
*/
int sqlite3_prepare(
sqlite3 *db, /* Database handle */
/*
** CAPIREF: Retrieving Statement SQL {F13100}
**
-** {F13101} If the compiled SQL statement passed as an argument was
-** compiled using either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()],
-** then this function returns a pointer to a zero-terminated string
-** containing a copy of the original SQL statement. {F13102} The
-** pointer is valid until the statement
-** is deleted using sqlite3_finalize().
-** {F13103} The string returned by sqlite3_sql() is always UTF8 even
-** if a UTF16 string was originally entered using [sqlite3_prepare16_v2()]
-** or the equivalent.
+** This intereface can be used to retrieve a saved copy of the original
+** SQL text used to create a [prepared statement].
+**
+** INVARIANTS:
**
-** {F13104} If the statement was compiled using either of the legacy
-** interfaces [sqlite3_prepare()] or [sqlite3_prepare16()], this
-** function returns NULL.
+** {F13101} If the [prepared statement] passed as
+** the an argument to [sqlite3_sql()] was compiled
+** compiled using either [sqlite3_prepare_v2()] or
+** [sqlite3_prepare16_v2()],
+** then [sqlite3_sql()] function returns a pointer to a
+** zero-terminated string containing a UTF-8 rendering
+** of the original SQL statement.
+**
+** {F13102} If the [prepared statement] passed as
+** the an argument to [sqlite3_sql()] was compiled
+** compiled using either [sqlite3_prepare()] or
+** [sqlite3_prepare16()],
+** then [sqlite3_sql()] function returns a NULL pointer.
+**
+** {F13103} The string returned by [sqlite3_sql(S)] is valid until the
+** [prepared statement] S is deleted using [sqlite3_finalize(S)].
*/
const char *sqlite3_sql(sqlite3_stmt *pStmt);
/*
** CAPI3REF: Dynamically Typed Value Object {F15000}
**
-** {F15001} SQLite uses the sqlite3_value object to represent all values
-** that are or can be stored in a database table. {END}
+** SQLite uses the sqlite3_value object to represent all values
+** that are or can be stored in a database table.
** SQLite uses dynamic typing for the values it stores.
-** {F15002} Values stored in sqlite3_value objects can be
+** Values stored in sqlite3_value objects can be
** be integers, floating point values, strings, BLOBs, or NULL.
*/
typedef struct Mem sqlite3_value;
** CAPI3REF: SQL Function Context Object {F16001}
**
** The context in which an SQL function executes is stored in an
-** sqlite3_context object. {F16002} A pointer to an sqlite3_context
+** sqlite3_context object. A pointer to an sqlite3_context
** object is always first parameter to application-defined SQL functions.
*/
typedef struct sqlite3_context sqlite3_context;
/*
** CAPI3REF: Binding Values To Prepared Statements {F13500}
**
-** {F13501} In the SQL strings input to [sqlite3_prepare_v2()] and its
+** In the SQL strings input to [sqlite3_prepare_v2()] and its
** variants, literals may be replace by a parameter in one
** of these forms:
**
** <ul>
** <li> ?
** <li> ?NNN
-** <li> :AAA
-** <li> @AAA
+** <li> :VVV
+** <li> @VVV
** <li> $VVV
** </ul>
**
** In the parameter forms shown above NNN is an integer literal,
-** AAA is an alphanumeric identifier and VVV is a variable name according
-** to the syntax rules of the TCL programming language. {END}
-** The values of these parameters (also called "host parameter names")
+** VVV alpha-numeric parameter name.
+** The values of these parameters (also called "host parameter names"
+** or "SQL parameters")
** can be set using the sqlite3_bind_*() routines defined here.
**
-** {F13502} The first argument to the sqlite3_bind_*() routines always
+** The first argument to the sqlite3_bind_*() routines always
** is a pointer to the [sqlite3_stmt] object returned from
-** [sqlite3_prepare_v2()] or its variants. {F13503} The second
-** argument is the index of the parameter to be set. {F13504} The
-** first parameter has an index of 1. {F13505} When the same named
+** [sqlite3_prepare_v2()] or its variants. The second
+** argument is the index of the parameter to be set. The
+** first parameter has an index of 1. When the same named
** parameter is used more than once, second and subsequent
** occurrences have the same index as the first occurrence.
-** {F13506} The index for named parameters can be looked up using the
-** [sqlite3_bind_parameter_name()] API if desired. {F13507} The index
+** The index for named parameters can be looked up using the
+** [sqlite3_bind_parameter_name()] API if desired. The index
** for "?NNN" parameters is the value of NNN.
-** {F13508} The NNN value must be between 1 and the compile-time
-** parameter SQLITE_MAX_VARIABLE_NUMBER (default value: 999). {END}
-** See <a href="limits.html">limits.html</a> for additional information.
+** The NNN value must be between 1 and the compile-time
+** parameter SQLITE_MAX_VARIABLE_NUMBER (default value: 999).
**
-** {F13509} The third argument is the value to bind to the parameter. {END}
+** The third argument is the value to bind to the parameter.
**
-** {F13510} In those
+** In those
** routines that have a fourth argument, its value is the number of bytes
-** in the parameter. To be clear: the value is the number of bytes in the
-** string, not the number of characters. {F13511} The number
+** in the parameter. To be clear: the value is the number of <u>bytes</u>
+** in the value, not the number of characters. The number
** of bytes does not include the zero-terminator at the end of strings.
-** {F13512}
** If the fourth parameter is negative, the length of the string is
-** number of bytes up to the first zero terminator. {END}
+** number of bytes up to the first zero terminator.
**
-** {F13513}
** The fifth argument to sqlite3_bind_blob(), sqlite3_bind_text(), and
** sqlite3_bind_text16() is a destructor used to dispose of the BLOB or
-** text after SQLite has finished with it. {F13514} If the fifth argument is
-** the special value [SQLITE_STATIC], then the library assumes that the
+** string after SQLite has finished with it. If the fifth argument is
+** the special value [SQLITE_STATIC], then SQLite assumes that the
** information is in static, unmanaged space and does not need to be freed.
-** {F13515} If the fifth argument has the value [SQLITE_TRANSIENT], then
+** If the fifth argument has the value [SQLITE_TRANSIENT], then
** SQLite makes its own private copy of the data immediately, before
-** the sqlite3_bind_*() routine returns. {END}
+** the sqlite3_bind_*() routine returns.
**
-** {F13520} The sqlite3_bind_zeroblob() routine binds a BLOB of length N that
-** is filled with zeros. {F13521} A zeroblob uses a fixed amount of memory
-** (just an integer to hold it size) while it is being processed. {END}
+** The sqlite3_bind_zeroblob() routine binds a BLOB of length N that
+** is filled with zeros. A zeroblob uses a fixed amount of memory
+** (just an integer to hold it size) while it is being processed.
** Zeroblobs are intended to serve as place-holders for BLOBs whose
** content is later written using
-** [sqlite3_blob_open | increment BLOB I/O] routines. {F13522} A negative
-** value for the zeroblob results in a zero-length BLOB. {END}
+** [sqlite3_blob_open | increment BLOB I/O] routines. A negative
+** value for the zeroblob results in a zero-length BLOB.
**
-** {F13530} The sqlite3_bind_*() routines must be called after
+** The sqlite3_bind_*() routines must be called after
** [sqlite3_prepare_v2()] (and its variants) or [sqlite3_reset()] and
-** before [sqlite3_step()]. {F13531}
+** before [sqlite3_step()].
** Bindings are not cleared by the [sqlite3_reset()] routine.
-** {F13532} Unbound parameters are interpreted as NULL. {END}
+** Unbound parameters are interpreted as NULL.
**
-** {F13540} These routines return [SQLITE_OK] on success or an error code if
-** anything goes wrong. {F13541} [SQLITE_RANGE] is returned if the parameter
-** index is out of range. {F13542} [SQLITE_NOMEM] is returned if malloc fails.
-** {F13543} [SQLITE_MISUSE] is returned if these routines are called on a
+** These routines return [SQLITE_OK] on success or an error code if
+** anything goes wrong. [SQLITE_RANGE] is returned if the parameter
+** index is out of range. [SQLITE_NOMEM] is returned if malloc fails.
+** [SQLITE_MISUSE] might be returned if these routines are called on a
** virtual machine that is the wrong state or which has already been finalized.
+** Detection of misuse is unreliable. Applications should not depend
+** on SQLITE_MISUSE returns. SQLITE_MISUSE is intended to indicate a
+** a logic error in the application. Future versions of SQLite might
+** panic rather than return SQLITE_MISUSE.
+**
+** See also: [sqlite3_bind_parameter_count()],
+** [sqlite3_bind_parameter_name()], and
+** [sqlite3_bind_parameter_index()].
+**
+** INVARIANTS:
+**
+** {F13506} The [sqlite3_prepare | SQL statement compiler] recognizes
+** tokens of the forms "?", "?NNN", "$VVV", ":VVV", and "@VVV"
+** as SQL parameters, where NNN is any sequence of one or more
+** digits and where VVV is any sequence of one or more
+** alphanumeric characters or "::" optionally followed by
+** a string containing no spaces and contained within parentheses.
+**
+** {F13509} The initial value of an SQL parameter is NULL.
+**
+** {F13512} The index of an "?" SQL parameter is one larger than the
+** largest index of SQL parameter to the left, or 1 if
+** the "?" is the leftmost SQL parameter.
+**
+** {F13515} The index of an "?NNN" SQL parameter is the integer NNN.
+**
+** {F13518} The index of an ":VVV", "$VVV", or "@VVV" SQL parameter is
+** the same as the index of leftmost occurances of the same
+** parameter, or one more than the largest index over all
+** parameters to the left if this is the first occurrance
+** of this parameter, or 1 if this is the leftmost parameter.
+**
+** {F13521} The [sqlite3_prepare | SQL statement compiler] fail with
+** an [SQLITE_RANGE] error if the index of an SQL parameter
+** is less than 1 or greater than SQLITE_MAX_VARIABLE_NUMBER.
+**
+** {F13524} Calls to [sqlite3_bind_text | sqlite3_bind(S,N,V,...)]
+** associate the value V with all SQL parameters having an
+** index of N in the [prepared statement] S.
+**
+** {F13527} Calls to [sqlite3_bind_text | sqlite3_bind(S,N,...)]
+** override prior calls with the same values of S and N.
+**
+** {F13530} Bindings established by [sqlite3_bind_text | sqlite3_bind(S,...)]
+** persist across calls to [sqlite3_reset(S)].
+**
+** {F13533} In calls to [sqlite3_bind_blob(S,N,V,L,D)],
+** [sqlite3_bind_text(S,N,V,L,D)], or
+** [sqlite3_bind_text16(S,N,V,L,D)] SQLite binds the first L
+** bytes of the blob or string pointed to by V, when L
+** is non-negative.
+**
+** {F13536} In calls to [sqlite3_bind_text(S,N,V,L,D)] or
+** [sqlite3_bind_text16(S,N,V,L,D)] SQLite binds characters
+** from V through the first zero character when L is negative.
+**
+** {F13539} In calls to [sqlite3_bind_blob(S,N,V,L,D)],
+** [sqlite3_bind_text(S,N,V,L,D)], or
+** [sqlite3_bind_text16(S,N,V,L,D)] when D is the special
+** constant [SQLITE_STATIC], SQLite assumes that the value V
+** is held in static unmanaged space that will not change
+** during the lifetime of the binding.
+**
+** {F13542} In calls to [sqlite3_bind_blob(S,N,V,L,D)],
+** [sqlite3_bind_text(S,N,V,L,D)], or
+** [sqlite3_bind_text16(S,N,V,L,D)] when D is the special
+** constant [SQLITE_TRANSIENT], the routine makes a
+** private copy of V value before it returns.
+**
+** {F13545} In calls to [sqlite3_bind_blob(S,N,V,L,D)],
+** [sqlite3_bind_text(S,N,V,L,D)], or
+** [sqlite3_bind_text16(S,N,V,L,D)] when D is a pointer to
+** a function, SQLite invokes that function to destroy the
+** V value after it has finished using the V value.
+**
+** {F13548} In calls to [sqlite3_bind_zeroblob(S,N,V,L)] the value bound
+** is a blob of L bytes, or a zero-length blob if L is negative.
*/
int sqlite3_bind_blob(sqlite3_stmt*, int, const void*, int n, void(*)(void*));
int sqlite3_bind_double(sqlite3_stmt*, int, double);
int sqlite3_bind_zeroblob(sqlite3_stmt*, int, int n);
/*
-** CAPI3REF: Number Of Host Parameters {F13600}
+** CAPI3REF: Number Of SQL Parameters {F13600}
+**
+** This routine can be used to find the number of SQL parameters
+** in a prepared statement. SQL parameters are tokens of the
+** form "?", "?NNN", ":AAA", "$AAA", or "@AAA" that serve as
+** place-holders for values that are [sqlite3_bind_blob | bound]
+** to the parameters at a later time.
**
-** {F13601} Return the largest host parameter index in the precompiled
-** statement given as the argument. {F13602} When the host parameters
-** are of the forms like ":AAA", "$VVV", "@AAA", or "?",
-** then they are assigned sequential increasing numbers beginning
-** with one, so the value returned is the number of parameters.
-** {F13603} However
-** if the same host parameter name is used multiple times, each occurrance
-** is given the same number, so the value returned in that case is the number
-** of unique host parameter names. {F13604} If host parameters of the
-** form "?NNN" are used (where NNN is an integer) then there might be
-** gaps in the numbering and the value returned by this interface is
-** the index of the host parameter with the largest index value. {END}
+** This routine actually returns the index of the largest parameter.
+** For all forms except ?NNN, this will correspond to the number of
+** unique parameters. If parameters of the ?NNN are used, there may
+** be gaps in the list.
**
-** {U13605} The prepared statement must not be [sqlite3_finalize | finalized]
-** prior to this routine returning. Otherwise the results are undefined
-** and probably undesirable.
+** See also: [sqlite3_bind_blob|sqlite3_bind()],
+** [sqlite3_bind_parameter_name()], and
+** [sqlite3_bind_parameter_index()].
+**
+** INVARIANTS:
+**
+** {F13601} The [sqlite3_bind_parameter_count(S)] interface returns
+** the largest index of all SQL parameters in the
+** [prepared statement] S, or 0 if S
+** contains no SQL parameters.
*/
int sqlite3_bind_parameter_count(sqlite3_stmt*);
/*
** CAPI3REF: Name Of A Host Parameter {F13620}
**
-** {F13621} This routine returns a pointer to the name of the n-th
-** parameter in a [sqlite3_stmt | prepared statement]. {F13622}
-** Host parameters of the form ":AAA" or "@AAA" or "$VVV" have a name
+** This routine returns a pointer to the name of the n-th
+** SQL parameter in a [prepared statement].
+** SQL parameters of the form ":AAA" or "@AAA" or "$AAA" have a name
** which is the string ":AAA" or "@AAA" or "$VVV".
** In other words, the initial ":" or "$" or "@"
-** is included as part of the name. {F13626}
+** is included as part of the name.
** Parameters of the form "?" or "?NNN" have no name.
**
-** {F13623} The first host parameter has an index of 1, not 0.
+** The first host parameter has an index of 1, not 0.
**
-** {F13624} If the value n is out of range or if the n-th parameter is
-** nameless, then NULL is returned. {F13625} The returned string is
+** If the value n is out of range or if the n-th parameter is
+** nameless, then NULL is returned. The returned string is
** always in the UTF-8 encoding even if the named parameter was
** originally specified as UTF-16 in [sqlite3_prepare16()] or
** [sqlite3_prepare16_v2()].
+**
+** See also: [sqlite3_bind_blob|sqlite3_bind()],
+** [sqlite3_bind_parameter_count()], and
+** [sqlite3_bind_parameter_index()].
+**
+** INVARIANTS:
+**
+** {F13621} The [sqlite3_bind_parameter_name(S,N)] interface returns
+** a UTF-8 rendering of the name of the SQL parameter in
+** [prepared statement] S having index N, or
+** NULL if there is no SQL parameter with index N or if the
+** parameter with index N is an anonymous parameter "?" or
+** a numbered parameter "?NNN".
*/
const char *sqlite3_bind_parameter_name(sqlite3_stmt*, int);
/*
** CAPI3REF: Index Of A Parameter With A Given Name {F13640}
**
-** {F13641} This routine returns the index of a host parameter with the
-** given name. {F13642} The name must match exactly. {F13643}
-** If no parameter with the given name is found, return 0.
-** {F13644} Parameter names must be UTF8.
+** Return the index of an SQL parameter given its name. The
+** index value returned is suitable for use as the second
+** parameter to [sqlite3_bind_blob|sqlite3_bind()]. A zero
+** is returned if no matching parameter is found. The parameter
+** name must be given in UTF-8 even if the original statement
+** was prepared from UTF-16 text using [sqlite3_prepare16_v2()].
+**
+** See also: [sqlite3_bind_blob|sqlite3_bind()],
+** [sqlite3_bind_parameter_count()], and
+** [sqlite3_bind_parameter_index()].
+**
+** INVARIANTS:
+**
+** {F13641} The [sqlite3_bind_parameter_index(S,N)] interface returns
+** the index of SQL parameter in [prepared statement]
+** S whose name matches the UTF-8 string N, or 0 if there is
+** no match.
*/
int sqlite3_bind_parameter_index(sqlite3_stmt*, const char *zName);
/*
** CAPI3REF: Reset All Bindings On A Prepared Statement {F13660}
**
-** {F13661} Contrary to the intuition of many, [sqlite3_reset()] does not
+** Contrary to the intuition of many, [sqlite3_reset()] does not
** reset the [sqlite3_bind_blob | bindings] on a
-** [sqlite3_stmt | prepared statement]. {F13662} Use this routine to
+** [prepared statement]. Use this routine to
** reset all host parameters to NULL.
+**
+** INVARIANTS:
+**
+** {F13661} The [sqlite3_clear_bindings(S)] interface resets all
+** SQL parameter bindings in [prepared statement] S
+** back to NULL.
*/
int sqlite3_clear_bindings(sqlite3_stmt*);
/*
** CAPI3REF: Number Of Columns In A Result Set {F13710}
**
-** {F13711} Return the number of columns in the result set returned by the
-** [sqlite3_stmt | compiled SQL statement]. {F13712} This routine returns 0
+** Return the number of columns in the result set returned by the
+** [prepared statement]. This routine returns 0
** if pStmt is an SQL statement that does not return data (for
** example an UPDATE).
+**
+** INVARIANTS:
+**
+** {F13711} The [sqlite3_column_count(S)] interface returns the number of
+** columns in the result set generated by the
+** [prepared statement] S, or 0 if S does not generate
+** a result set.
*/
int sqlite3_column_count(sqlite3_stmt *pStmt);
/*
** CAPI3REF: Column Names In A Result Set {F13720}
**
-** {F13721} These routines return the name assigned to a particular column
-** in the result set of a SELECT statement. {F13722} The sqlite3_column_name()
+** These routines return the name assigned to a particular column
+** in the result set of a SELECT statement. The sqlite3_column_name()
** interface returns a pointer to a zero-terminated UTF8 string
** and sqlite3_column_name16() returns a pointer to a zero-terminated
-** UTF16 string. {F13723} The first parameter is the
-** [sqlite3_stmt | prepared statement] that implements the SELECT statement.
+** UTF16 string. The first parameter is the
+** [prepared statement] that implements the SELECT statement.
** The second parameter is the column number. The left-most column is
** number 0.
**
-** {F13724} The returned string pointer is valid until either the
-** [sqlite3_stmt | prepared statement] is destroyed by [sqlite3_finalize()]
+** The returned string pointer is valid until either the
+** [prepared statement] is destroyed by [sqlite3_finalize()]
** or until the next call sqlite3_column_name() or sqlite3_column_name16()
** on the same column.
**
-** {F13725} If sqlite3_malloc() fails during the processing of either routine
+** If sqlite3_malloc() fails during the processing of either routine
** (for example during a conversion from UTF-8 to UTF-16) then a
** NULL pointer is returned.
+**
+** The name of a result column is the value of the "AS" clause for
+** that column, if there is an AS clause. If there is no AS clause
+** then the name of the column is unspecified and may change from
+** one release of SQLite to the next.
+**
+** INVARIANTS:
+**
+** {F13721} A successful invocation of the [sqlite3_column_name(S,N)]
+** interface returns the name
+** of the Nth column (where 0 is the left-most column) for the
+** result set of [prepared statement] S as a
+** zero-terminated UTF-8 string.
+**
+** {F13723} A successful invocation of the [sqlite3_column_name16(S,N)]
+** interface returns the name
+** of the Nth column (where 0 is the left-most column) for the
+** result set of [prepared statement] S as a
+** zero-terminated UTF-16 string in the native byte order.
+**
+** {F13724} The [sqlite3_column_name()] and [sqlite3_column_name16()]
+** interfaces return a NULL pointer if they are unable to
+** allocate memory memory to hold there normal return strings.
+**
+** {F13725} If the N parameter to [sqlite3_column_name(S,N)] or
+** [sqlite3_column_name16(S,N)] is out of range, then the
+** interfaces returns a NULL pointer.
+**
+** {F13726} The strings returned by [sqlite3_column_name(S,N)] and
+** [sqlite3_column_name16(S,N)] are valid until the next
+** call to either routine with the same S and N parameters
+** or until [sqlite3_finalize(S)] is called.
+**
+** {F13727} When a result column of a [SELECT] statement contains
+** an AS clause, the name of that column is the indentifier
+** to the right of the AS keyword.
*/
const char *sqlite3_column_name(sqlite3_stmt*, int N);
const void *sqlite3_column_name16(sqlite3_stmt*, int N);
/*
** CAPI3REF: Source Of Data In A Query Result {F13740}
**
-** {F13741} These routines provide a means to determine what column of what
+** These routines provide a means to determine what column of what
** table in which database a result of a SELECT statement comes from.
-** {F13742} The name of the database or table or column can be returned as
-** either a UTF8 or UTF16 string. {F13743} The _database_ routines return
+** The name of the database or table or column can be returned as
+** either a UTF8 or UTF16 string. The _database_ routines return
** the database name, the _table_ routines return the table name, and
-** the origin_ routines return the column name. {F13744}
+** the origin_ routines return the column name.
** The returned string is valid until
-** the [sqlite3_stmt | prepared statement] is destroyed using
+** the [prepared statement] is destroyed using
** [sqlite3_finalize()] or until the same information is requested
** again in a different encoding.
**
-** {F13745} The names returned are the original un-aliased names of the
+** The names returned are the original un-aliased names of the
** database, table, and column.
**
-** {F13746} The first argument to the following calls is a
-** [sqlite3_stmt | compiled SQL statement].
-** {F13747} These functions return information about the Nth column returned by
+** The first argument to the following calls is a [prepared statement].
+** These functions return information about the Nth column returned by
** the statement, where N is the second function argument.
**
-** {F13748} If the Nth column returned by the statement is an expression
+** If the Nth column returned by the statement is an expression
** or subquery and is not a column value, then all of these functions
-** return NULL. {F13749} Otherwise, they return the
+** return NULL. These routine might also return NULL if a memory
+** allocation error occurs. Otherwise, they return the
** name of the attached database, table and column that query result
** column was extracted from.
**
-** {F13750} As with all other SQLite APIs, those postfixed with "16" return
+** As with all other SQLite APIs, those postfixed with "16" return
** UTF-16 encoded strings, the other functions return UTF-8. {END}
**
** These APIs are only available if the library was compiled with the
** If two or more threads call one or more of these routines against the same
** prepared statement and column at the same time then the results are
** undefined.
+**
+** INVARIANTS:
+**
+** {F13741} The [sqlite3_column_database_name(S,N)] interface returns either
+** the UTF-8 zero-terminated name of the database from which the
+** Nth result column of [prepared statement] S
+** is extracted, or NULL if the the Nth column of S is a
+** general expression or if unable to allocate memory
+** to store the name.
+**
+** {F13742} The [sqlite3_column_database_name16(S,N)] interface returns either
+** the UTF-16 native byte order
+** zero-terminated name of the database from which the
+** Nth result column of [prepared statement] S
+** is extracted, or NULL if the the Nth column of S is a
+** general expression or if unable to allocate memory
+** to store the name.
+**
+** {F13743} The [sqlite3_column_table_name(S,N)] interface returns either
+** the UTF-8 zero-terminated name of the table from which the
+** Nth result column of [prepared statement] S
+** is extracted, or NULL if the the Nth column of S is a
+** general expression or if unable to allocate memory
+** to store the name.
+**
+** {F13744} The [sqlite3_column_table_name16(S,N)] interface returns either
+** the UTF-16 native byte order
+** zero-terminated name of the table from which the
+** Nth result column of [prepared statement] S
+** is extracted, or NULL if the the Nth column of S is a
+** general expression or if unable to allocate memory
+** to store the name.
+**
+** {F13745} The [sqlite3_column_origin_name(S,N)] interface returns either
+** the UTF-8 zero-terminated name of the table column from which the
+** Nth result column of [prepared statement] S
+** is extracted, or NULL if the the Nth column of S is a
+** general expression or if unable to allocate memory
+** to store the name.
+**
+** {F13746} The [sqlite3_column_origin_name16(S,N)] interface returns either
+** the UTF-16 native byte order
+** zero-terminated name of the table column from which the
+** Nth result column of [prepared statement] S
+** is extracted, or NULL if the the Nth column of S is a
+** general expression or if unable to allocate memory
+** to store the name.
+**
+** {F13748} The return values from
+** [sqlite3_column_database_name|column metadata interfaces]
+** are valid
+** for the lifetime of the [prepared statement]
+** or until the encoding is changed by another metadata
+** interface call for the same prepared statement and column.
+**
+** LIMITATIONS:
+**
+** {U13751} If two or more threads call one or more
+** [sqlite3_column_database_name|column metadata interfaces]
+** the same [prepared statement] and result column
+** at the same time then the results are undefined.
*/
const char *sqlite3_column_database_name(sqlite3_stmt*,int);
const void *sqlite3_column_database_name16(sqlite3_stmt*,int);
/*
** CAPI3REF: Declared Datatype Of A Query Result {F13760}
**
-** The first parameter is a [sqlite3_stmt | compiled SQL statement].
-** {F13761} If this statement is a SELECT statement and the Nth column of the
+** The first parameter is a [prepared statement].
+** If this statement is a SELECT statement and the Nth column of the
** returned result set of that SELECT is a table column (not an
** expression or subquery) then the declared type of the table
-** column is returned. {F13762} If the Nth column of the result set is an
+** column is returned. If the Nth column of the result set is an
** expression or subquery, then a NULL pointer is returned.
-** {F13763} The returned string is always UTF-8 encoded. {END}
+** The returned string is always UTF-8 encoded. {END}
** For example, in the database schema:
**
** CREATE TABLE t1(c1 VARIANT);
** strongly typed, but the typing is dynamic not static. Type
** is associated with individual values, not with the containers
** used to hold those values.
+**
+** INVARIANTS:
+**
+** {F13761} A successful call to [sqlite3_column_decltype(S,N)]
+** returns a zero-terminated UTF-8 string containing the
+** the declared datatype of the table column that appears
+** as the Nth column (numbered from 0) of the result set to the
+** [prepared statement] S.
+**
+** {F13762} A successful call to [sqlite3_column_decltype16(S,N)]
+** returns a zero-terminated UTF-16 native byte order string
+** containing the declared datatype of the table column that appears
+** as the Nth column (numbered from 0) of the result set to the
+** [prepared statement] S.
+**
+** {F13763} If N is less than 0 or N is greater than or equal to
+** the number of columns in [prepared statement] S
+** or if the Nth column of S is an expression or subquery rather
+** than a table column or if a memory allocation failure
+** occurs during encoding conversions, then
+** calls to [sqlite3_column_decltype(S,N)] or
+** [sqlite3_column_decltype16(S,N)] return NULL.
*/
-const char *sqlite3_column_decltype(sqlite3_stmt *, int i);
+const char *sqlite3_column_decltype(sqlite3_stmt*,int);
const void *sqlite3_column_decltype16(sqlite3_stmt*,int);
/*
** CAPI3REF: Evaluate An SQL Statement {F13200}
**
-** After an [sqlite3_stmt | SQL statement] has been prepared with a call
+** After an [prepared statement] has been prepared with a call
** to either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] or to one of
** the legacy interfaces [sqlite3_prepare()] or [sqlite3_prepare16()],
** then this function must be called one or more times to evaluate the
** With the legacy interface, a more specific error code (example:
** [SQLITE_INTERRUPT], [SQLITE_SCHEMA], [SQLITE_CORRUPT], and so forth)
** can be obtained by calling [sqlite3_reset()] on the
-** [sqlite3_stmt | prepared statement]. In the "v2" interface,
+** [prepared statement]. In the "v2" interface,
** the more specific error code is returned directly by sqlite3_step().
**
** [SQLITE_MISUSE] means that the this routine was called inappropriately.
-** Perhaps it was called on a [sqlite3_stmt | prepared statement] that has
+** Perhaps it was called on a [prepared statement] that has
** already been [sqlite3_finalize | finalized] or on one that had
** previously returned [SQLITE_ERROR] or [SQLITE_DONE]. Or it could
** be the case that the same database connection is being used by two or
** [SQLITE_ERROR], following any error other than [SQLITE_BUSY]
** and [SQLITE_MISUSE]. You must call [sqlite3_reset()] or
** [sqlite3_finalize()] in order to find one of the specific
-** [SQLITE_ERROR | result codes] that better describes the error.
+** [error codes] that better describes the error.
** We admit that this is a goofy design. The problem has been fixed
** with the "v2" interface. If you prepare all of your SQL statements
** using either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] instead
** of the legacy [sqlite3_prepare()] and [sqlite3_prepare16()], then the
-** more specific [SQLITE_ERROR | result codes] are returned directly
+** more specific [error codes] are returned directly
** by sqlite3_step(). The use of the "v2" interface is recommended.
+**
+** INVARIANTS:
+**
+** {F13202} If [prepared statement] S is ready to be
+** run, then [sqlite3_step(S)] advances that prepared statement
+** until to completion or until it is ready to return another
+** row of the result set or an interrupt or run-time error occurs.
+**
+** {F15304} When a call to [sqlite3_step(S)] causes the
+** [prepared statement] S to run to completion,
+** the function returns [SQLITE_DONE].
+**
+** {F15306} When a call to [sqlite3_step(S)] stops because it is ready
+** to return another row of the result set, it returns
+** [SQLITE_ROW].
+**
+** {F15308} If a call to [sqlite3_step(S)] encounters an
+** [sqlite3_interrupt|interrupt] or a run-time error,
+** it returns an appropraite error code that is not one of
+** [SQLITE_OK], [SQLITE_ROW], or [SQLITE_DONE].
+**
+** {F15310} If an [sqlite3_interrupt|interrupt] or run-time error
+** occurs during a call to [sqlite3_step(S)]
+** for a [prepared statement] S created using
+** legacy interfaces [sqlite3_prepare()] or
+** [sqlite3_prepare16()] then the function returns either
+** [SQLITE_ERROR], [SQLITE_BUSY], or [SQLITE_MISUSE].
*/
int sqlite3_step(sqlite3_stmt*);
**
** Return the number of values in the current row of the result set.
**
-** {F13771} After a call to [sqlite3_step()] that returns [SQLITE_ROW],
-** this routine
-** will return the same value as the [sqlite3_column_count()] function.
-** {F13772}
-** After [sqlite3_step()] has returned an [SQLITE_DONE], [SQLITE_BUSY], or
-** a [SQLITE_ERROR | error code], or before [sqlite3_step()] has been
-** called on the [sqlite3_stmt | prepared statement] for the first time,
-** this routine returns zero.
+** INVARIANTS:
+**
+** {F13771} After a call to [sqlite3_step(S)] that returns
+** [SQLITE_ROW], the [sqlite3_data_count(S)] routine
+** will return the same value as the
+** [sqlite3_column_count(S)] function.
+**
+** {F13772} After [sqlite3_step(S)] has returned any value other than
+** [SQLITE_ROW] or before [sqlite3_step(S)] has been
+** called on the [prepared statement] for
+** the first time since it was [sqlite3_prepare|prepared]
+** or [sqlite3_reset|reset], the [sqlite3_data_count(S)]
+** routine returns zero.
*/
int sqlite3_data_count(sqlite3_stmt *pStmt);
/*
** CAPI3REF: Fundamental Datatypes {F10265}
+** KEYWORDS: SQLITE_TEXT
**
** {F10266}Every value in SQLite has one of five fundamental datatypes:
**
/*
** CAPI3REF: Results Values From A Query {F13800}
**
+** These routines form the "result set query" interface.
+**
** These routines return information about
** a single column of the current result row of a query. In every
** case the first argument is a pointer to the
-** [sqlite3_stmt | SQL statement] that is being
+** [prepared statement] that is being
** evaluated (the [sqlite3_stmt*] that was returned from
** [sqlite3_prepare_v2()] or one of its variants) and
** the second argument is the index of the column for which information
** bytes in the string, not the number of characters.
**
** Strings returned by sqlite3_column_text() and sqlite3_column_text16(),
-** even zero-length strings, are always zero terminated. The return
+** even empty strings, are always zero terminated. The return
** value from sqlite3_column_blob() for a zero-length blob is an arbitrary
** pointer, possibly even a NULL pointer.
**
** The sqlite3_column_bytes16() routine is similar to sqlite3_column_bytes()
-** but leaves the result in UTF-16 instead of UTF-8.
+** but leaves the result in UTF-16 in native byte order instead of UTF-8.
** The zero terminator is not included in this count.
**
** These routines attempt to convert the value where appropriate. For
** is either the integer 0, the floating point number 0.0, or a NULL
** pointer. Subsequent calls to [sqlite3_errcode()] will return
** [SQLITE_NOMEM].
+**
+** INVARIANTS:
+**
+** {F13803} The [sqlite3_column_blob(S,N)] interface converts the
+** Nth column in the current row of the result set for
+** [prepared statement] S into a blob and then returns a
+** pointer to the converted value.
+**
+** {F13806} The [sqlite3_column_bytes(S,N)] interface returns the
+** number of bytes in the blob or string (exclusive of the
+** zero terminator on the string) that was returned by the
+** most recent call to [sqlite3_column_blob(S,N)] or
+** [sqlite3_column_text(S,N)].
+**
+** {F13809} The [sqlite3_column_bytes16(S,N)] interface returns the
+** number of bytes in the string (exclusive of the
+** zero terminator on the string) that was returned by the
+** most recent call to [sqlite3_column_text16(S,N)].
+**
+** {F13812} The [sqlite3_column_double(S,N)] interface converts the
+** Nth column in the current row of the result set for
+** [prepared statement] S into a floating point value and
+** returns a copy of that value.
+**
+** {F13815} The [sqlite3_column_int(S,N)] interface converts the
+** Nth column in the current row of the result set for
+** [prepared statement] S into a 64-bit signed integer and
+** returns the lower 32 bits of that integer.
+**
+** {F13818} The [sqlite3_column_int64(S,N)] interface converts the
+** Nth column in the current row of the result set for
+** [prepared statement] S into a 64-bit signed integer and
+** returns a copy of that integer.
+**
+** {F13821} The [sqlite3_column_text(S,N)] interface converts the
+** Nth column in the current row of the result set for
+** [prepared statement] S into a zero-terminated UTF-8
+** string and returns a pointer to that string.
+**
+** {F13824} The [sqlite3_column_text16(S,N)] interface converts the
+** Nth column in the current row of the result set for
+** [prepared statement] S into a zero-terminated 2-byte
+** aligned UTF-16 native byte order
+** string and returns a pointer to that string.
+**
+** {F13827} The [sqlite3_column_type(S,N)] interface returns
+** one of [SQLITE_NULL], [SQLITE_INTEGER], [SQLITE_FLOAT],
+** [SQLITE_TEXT], or [SQLITE_BLOB] as appropriate for
+** the Nth column in the current row of the result set for
+** [prepared statement] S.
+**
+** {F13830} The [sqlite3_column_value(S,N)] interface returns a
+** pointer to the [sqlite3_value] object that for the
+** Nth column in the current row of the result set for
+** [prepared statement] S.
*/
const void *sqlite3_column_blob(sqlite3_stmt*, int iCol);
int sqlite3_column_bytes(sqlite3_stmt*, int iCol);
** CAPI3REF: Destroy A Prepared Statement Object {F13300}
**
** The sqlite3_finalize() function is called to delete a
-** [sqlite3_stmt | compiled SQL statement]. If the statement was
+** [prepared statement]. If the statement was
** executed successfully, or not executed at all, then SQLITE_OK is returned.
** If execution of the statement failed then an
-** [SQLITE_ERROR | error code] or [SQLITE_IOERR_READ | extended error code]
+** [error code] or [extended error code]
** is returned.
**
** This routine can be called at any point during the execution of the
-** [sqlite3_stmt | virtual machine]. If the virtual machine has not
+** [prepared statement]. If the virtual machine has not
** completed execution when this routine is called, that is like
** encountering an error or an interrupt. (See [sqlite3_interrupt()].)
** Incomplete updates may be rolled back and transactions cancelled,
** depending on the circumstances, and the
-** [SQLITE_ERROR | result code] returned will be [SQLITE_ABORT].
+** [error code] returned will be [SQLITE_ABORT].
+**
+** INVARIANTS:
+**
+** {F11302} The [sqlite3_finalize(S)] interface destroys the
+** [prepared statement] S and releases all
+** memory and file resources held by that object.
+**
+** {F11304} If the most recent call to [sqlite3_step(S)] for the
+** [prepared statement] S returned an error,
+** then [sqlite3_finalize(S)] returns that same error.
*/
int sqlite3_finalize(sqlite3_stmt *pStmt);
** CAPI3REF: Reset A Prepared Statement Object {F13330}
**
** The sqlite3_reset() function is called to reset a
-** [sqlite3_stmt | compiled SQL statement] object.
+** [prepared statement] object.
** back to its initial state, ready to be re-executed.
** Any SQL statement variables that had values bound to them using
** the [sqlite3_bind_blob | sqlite3_bind_*() API] retain their values.
** Use [sqlite3_clear_bindings()] to reset the bindings.
+**
+** {F11332} The [sqlite3_reset(S)] interface resets the [prepared statement] S
+** back to the beginning of its program.
+**
+** {F11334} If the most recent call to [sqlite3_step(S)] for
+** [prepared statement] S returned [SQLITE_ROW] or [SQLITE_DONE],
+** or if [sqlite3_step(S)] has never before been called on S,
+** then [sqlite3_reset(S)] returns [SQLITE_OK].
+**
+** {F11336} If the most recent call to [sqlite3_step(S)] for
+** [prepared statement] S indicated an error, then
+** [sqlite3_reset(S)] returns an appropriate [error code].
+**
+** {F11338} The [sqlite3_reset(S)] interface does not change the values
+** of any [sqlite3_bind_blob|bindings] on [prepared statement] S.
*/
int sqlite3_reset(sqlite3_stmt *pStmt);
/*
** CAPI3REF: Create Or Redefine SQL Functions {F16100}
+** KEYWORDS: {function creation routines}
**
-** The following two functions are used to add SQL functions or aggregates
+** These two functions (collectively known as
+** "function creation routines") are used to add SQL functions or aggregates
** or to redefine the behavior of existing SQL functions or aggregates. The
** difference only between the two is that the second parameter, the
** name of the (scalar) function or aggregate, is encoded in UTF-8 for
** sqlite3_create_function() and UTF-16 for sqlite3_create_function16().
**
-** The first argument is the [sqlite3 | database handle] that holds the
-** SQL function or aggregate is to be added or redefined. If a single
-** program uses more than one database handle internally, then SQL
-** functions or aggregates must be added individually to each database
-** handle with which they will be used.
+** The first parameter is the [database connection] to which the SQL
+** function is to be added. If a single
+** program uses more than one [database connection] internally, then SQL
+** functions must be added individually to each [database connection].
**
** The second parameter is the name of the SQL function to be created
** or redefined.
** arguments or differing perferred text encodings. SQLite will use
** the implementation most closely matches the way in which the
** SQL function is used.
+**
+** INVARIANTS:
+**
+** {F16103} The [sqlite3_create_function16()] interface behaves exactly
+** like [sqlite3_create_function()] in every way except that it
+** interprets the zFunctionName argument as
+** zero-terminated UTF-16 native byte order instead of as a
+** zero-terminated UTF-8.
+**
+** {F16106} A successful invocation of
+** the [sqlite3_create_function(D,X,N,E,...)] interface registers
+** or replaces callback functions in [database connection] D
+** used to implement the SQL function named X with N parameters
+** and having a perferred text encoding of E.
+**
+** {F16109} A successful call to [sqlite3_create_function(D,X,N,E,P,F,S,L)]
+** replaces the P, F, S, and L values from any prior calls with
+** the same D, X, N, and E values.
+**
+** {F16112} The [sqlite3_create_function(D,X,...)] interface fails with
+** a return code of [SQLITE_ERROR] if the SQL function name X is
+** longer than 255 bytes exclusive of the zero terminator.
+**
+** {F16118} Either F must be NULL and S and L are non-NULL or else F
+** is non-NULL and S and L are NULL, otherwise
+** [sqlite3_create_function(D,X,N,E,P,F,S,L)] returns [SQLITE_ERROR].
+**
+** {F16121} The [sqlite3_create_function(D,...)] interface fails with an
+** error code of [SQLITE_BUSY] if there exist [prepared statements]
+** associated with the [database connection] D.
+**
+** {F16124} The [sqlite3_create_function(D,X,N,...)] interface fails with an
+** error code of [SQLITE_ERROR] if parameter N (specifying the number
+** of arguments to the SQL function being registered) is less
+** than -1 or greater than 127.
+**
+** {F16127} When N is non-negative, the [sqlite3_create_function(D,X,N,...)]
+** interface causes callbacks to be invoked for the SQL function
+** named X when the number of arguments to the SQL function is
+** exactly N.
+**
+** {F16130} When N is -1, the [sqlite3_create_function(D,X,N,...)]
+** interface causes callbacks to be invoked for the SQL function
+** named X with any number of arguments.
+**
+** {F16133} When calls to [sqlite3_create_function(D,X,N,...)]
+** specify multiple implementations of the same function X
+** and when one implementation has N>=0 and the other has N=(-1)
+** the implementation with a non-zero N is preferred.
+**
+** {F16136} When calls to [sqlite3_create_function(D,X,N,E,...)]
+** specify multiple implementations of the same function X with
+** the same number of arguments N but with different
+** encodings E, then the implementation where E matches the
+** database encoding is preferred.
+**
+** {F16139} For an aggregate SQL function created using
+** [sqlite3_create_function(D,X,N,E,P,0,S,L)] the finializer
+** function L will always be invoked exactly once if the
+** step function S is called one or more times.
*/
int sqlite3_create_function(
- sqlite3 *,
+ sqlite3 *db,
const char *zFunctionName,
int nArg,
int eTextRep,
- void*,
+ void *pApp,
void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
void (*xStep)(sqlite3_context*,int,sqlite3_value**),
void (*xFinal)(sqlite3_context*)
);
int sqlite3_create_function16(
- sqlite3*,
+ sqlite3 *db,
const void *zFunctionName,
int nArg,
int eTextRep,
- void*,
+ void *pApp,
void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
void (*xStep)(sqlite3_context*,int,sqlite3_value**),
void (*xFinal)(sqlite3_context*)
** interface, then these routines should be called from the same thread
** that ran [sqlite3_column_value()].
**
+**
+** INVARIANTS:
+**
+** {F15103} The [sqlite3_value_blob(V)] interface converts the
+** [sqlite3_value] object V into a blob and then returns a
+** pointer to the converted value.
+**
+** {F15106} The [sqlite3_value_bytes(V)] interface returns the
+** number of bytes in the blob or string (exclusive of the
+** zero terminator on the string) that was returned by the
+** most recent call to [sqlite3_value_blob(V)] or
+** [sqlite3_value_text(V)].
+**
+** {F15109} The [sqlite3_value_bytes16(V)] interface returns the
+** number of bytes in the string (exclusive of the
+** zero terminator on the string) that was returned by the
+** most recent call to [sqlite3_value_text16(V)],
+** [sqlite3_value_text16be(V)], or [sqlite3_value_text16le(V)].
+**
+** {F15112} The [sqlite3_value_double(V)] interface converts the
+** [sqlite3_value] object V into a floating point value and
+** returns a copy of that value.
+**
+** {F15115} The [sqlite3_value_int(V)] interface converts the
+** [sqlite3_value] object V into a 64-bit signed integer and
+** returns the lower 32 bits of that integer.
+**
+** {F15118} The [sqlite3_value_int64(V)] interface converts the
+** [sqlite3_value] object V into a 64-bit signed integer and
+** returns a copy of that integer.
+**
+** {F15121} The [sqlite3_value_text(V)] interface converts the
+** [sqlite3_value] object V into a zero-terminated UTF-8
+** string and returns a pointer to that string.
+**
+** {F15124} The [sqlite3_value_text16(V)] interface converts the
+** [sqlite3_value] object V into a zero-terminated 2-byte
+** aligned UTF-16 native byte order
+** string and returns a pointer to that string.
+**
+** {F15127} The [sqlite3_value_text16be(V)] interface converts the
+** [sqlite3_value] object V into a zero-terminated 2-byte
+** aligned UTF-16 big-endian
+** string and returns a pointer to that string.
+**
+** {F15130} The [sqlite3_value_text16le(V)] interface converts the
+** [sqlite3_value] object V into a zero-terminated 2-byte
+** aligned UTF-16 little-endian
+** string and returns a pointer to that string.
+**
+** {F15133} The [sqlite3_value_type(V)] interface returns
+** one of [SQLITE_NULL], [SQLITE_INTEGER], [SQLITE_FLOAT],
+** [SQLITE_TEXT], or [SQLITE_BLOB] as appropriate for
+** the [sqlite3_value] object V.
+**
+** {F15136} The [sqlite3_value_numeric_type(V)] interface converts
+** the [sqlite3_value] object V into either an integer or
+** a floating point value if it can do so without loss of
+** information, and returns one of [SQLITE_NULL],
+** [SQLITE_INTEGER], [SQLITE_FLOAT], [SQLITE_TEXT], or
+** [SQLITE_BLOB] as appropriate for
+** the [sqlite3_value] object V after the conversion attempt.
*/
const void *sqlite3_value_blob(sqlite3_value*);
int sqlite3_value_bytes(sqlite3_value*);
**
** The implementation of aggregate SQL functions use this routine to allocate
** a structure for storing their state.
-** {F16211} The first time the sqlite3_aggregate_context() routine is
+** The first time the sqlite3_aggregate_context() routine is
** is called for a particular aggregate, SQLite allocates nBytes of memory
** zeros that memory, and returns a pointer to it.
-** {F16212} On second and subsequent calls to sqlite3_aggregate_context()
-** for the same aggregate function index, the same buffer is returned. {END}
+** On second and subsequent calls to sqlite3_aggregate_context()
+** for the same aggregate function index, the same buffer is returned.
** The implementation
** of the aggregate can use the returned buffer to accumulate data.
**
-** {F16213} SQLite automatically frees the allocated buffer when the aggregate
-** query concludes. {END}
+** SQLite automatically frees the allocated buffer when the aggregate
+** query concludes.
**
** The first parameter should be a copy of the
** [sqlite3_context | SQL function context] that is the first
**
** This routine must be called from the same thread in which
** the aggregate SQL function is running.
+**
+** INVARIANTS:
+**
+** {F16211} The first invocation of [sqlite3_aggregate_context(C,N)] for
+** a particular instance of an aggregate function (for a particular
+** context C) causes SQLite to allocation N bytes of memory,
+** zero that memory, and return a pointer to the allocationed
+** memory.
+**
+** {F16213} If a memory allocation error occurs during
+** [sqlite3_aggregate_context(C,N)] then the function returns 0.
+**
+** {F16215} Second and subsequent invocations of
+** [sqlite3_aggregate_context(C,N)] for the same context pointer C
+** ignore the N parameter and return a pointer to the same
+** block of memory returned by the first invocation.
+**
+** {F16217} The memory allocated by [sqlite3_aggregate_context(C,N)] is
+** automatically freed on the next call to [sqlite3_reset()]
+** or [sqlite3_finalize()] for the [prepared statement] containing
+** the aggregate function associated with context C.
*/
void *sqlite3_aggregate_context(sqlite3_context*, int nBytes);
/*
** CAPI3REF: User Data For Functions {F16240}
**
-** {F16241} The sqlite3_user_data() interface returns a copy of
+** The sqlite3_user_data() interface returns a copy of
** the pointer that was the pUserData parameter (the 5th parameter)
** of the the [sqlite3_create_function()]
** and [sqlite3_create_function16()] routines that originally
** registered the application defined function. {END}
**
-** {U16243} This routine must be called from the same thread in which
+** This routine must be called from the same thread in which
** the application-defined function is running.
+**
+** INVARIANTS:
+**
+** {F16243} The [sqlite3_user_data(C)] interface returns a copy of the
+** P pointer from the [sqlite3_create_function(D,X,N,E,P,F,S,L)]
+** or [sqlite3_create_function16(D,X,N,E,P,F,S,L)] call that
+** registered the SQL function associated with
+** [sqlite3_context] C.
*/
void *sqlite3_user_data(sqlite3_context*);
** invocations of the same function so that the original pattern string
** does not need to be recompiled on each invocation.
**
-** {F16271}
** The sqlite3_get_auxdata() interface returns a pointer to the meta-data
** associated by the sqlite3_set_auxdata() function with the Nth argument
** value to the application-defined function.
-** {F16272} If no meta-data has been ever been set for the Nth
+** If no meta-data has been ever been set for the Nth
** argument of the function, or if the cooresponding function parameter
** has changed since the meta-data was set, then sqlite3_get_auxdata()
** returns a NULL pointer.
**
-** {F16275} The sqlite3_set_auxdata() interface saves the meta-data
+** The sqlite3_set_auxdata() interface saves the meta-data
** pointed to by its 3rd parameter as the meta-data for the N-th
-** argument of the application-defined function. {END} Subsequent
+** argument of the application-defined function. Subsequent
** calls to sqlite3_get_auxdata() might return this data, if it has
** not been destroyed.
-** {F16277} If it is not NULL, SQLite will invoke the destructor
+** If it is not NULL, SQLite will invoke the destructor
** function given by the 4th parameter to sqlite3_set_auxdata() on
** the meta-data when the corresponding function parameter changes
-** or when the SQL statement completes, whichever comes first. {END}
+** or when the SQL statement completes, whichever comes first.
+**
+** SQLite is free to call the destructor and drop meta-data on
+** any parameter of any function at any time. The only guarantee
+** is that the destructor will be called before the metadata is
+** dropped.
**
** In practice, meta-data is preserved between function calls for
** expressions that are constant at compile time. This includes literal
**
** These routines must be called from the same thread in which
** the SQL function is running.
+**
+** INVARIANTS:
+**
+** {F16272} The [sqlite3_get_auxdata(C,N)] interface returns a pointer
+** to metadata associated with the Nth parameter of the SQL function
+** whose context is C, or NULL if there is no metadata associated
+** with that parameter.
+**
+** {F16274} The [sqlite3_set_auxdata(C,N,P,D)] interface assigns a metadata
+** pointer P to the Nth parameter of the SQL function with context
+** C.
+**
+** {F16276} SQLite will invoke the destructor D with a single argument
+** which is the metadata pointer P following a call to
+** [sqlite3_set_auxdata(C,N,P,D)] when SQLite ceases to hold
+** the metadata.
+**
+** {F16277} SQLite ceases to hold metadata for an SQL function parameter
+** when the value of that parameter changes.
+**
+** {F16278} When [sqlite3_set_auxdata(C,N,P,D)] is invoked, the destructor
+** is called for any prior metadata associated with the same function
+** context C and parameter N.
+**
+** {F16279} SQLite will call destructors for any metadata it is holding
+** in a particular [prepared statement] S when either
+** [sqlite3_reset(S)] or [sqlite3_finalize(S)] is called.
*/
void *sqlite3_get_auxdata(sqlite3_context*, int N);
void sqlite3_set_auxdata(sqlite3_context*, int N, void*, void (*)(void*));
** [sqlite3_bind_blob | sqlite3_bind_* documentation] for
** additional information.
**
-** {F16402} The sqlite3_result_blob() interface sets the result from
+** The sqlite3_result_blob() interface sets the result from
** an application defined function to be the BLOB whose content is pointed
** to by the second parameter and which is N bytes long where N is the
** third parameter.
-** {F16403} The sqlite3_result_zeroblob() inerfaces set the result of
+** The sqlite3_result_zeroblob() inerfaces set the result of
** the application defined function to be a BLOB containing all zero
** bytes and N bytes in size, where N is the value of the 2nd parameter.
**
-** {F16407} The sqlite3_result_double() interface sets the result from
+** The sqlite3_result_double() interface sets the result from
** an application defined function to be a floating point value specified
** by its 2nd argument.
**
-** {F16409} The sqlite3_result_error() and sqlite3_result_error16() functions
+** The sqlite3_result_error() and sqlite3_result_error16() functions
** cause the implemented SQL function to throw an exception.
-** {F16411} SQLite uses the string pointed to by the
+** SQLite uses the string pointed to by the
** 2nd parameter of sqlite3_result_error() or sqlite3_result_error16()
-** as the text of an error message. {F16412} SQLite interprets the error
-** message string from sqlite3_result_error() as UTF8. {F16413} SQLite
+** as the text of an error message. SQLite interprets the error
+** message string from sqlite3_result_error() as UTF8. SQLite
** interprets the string from sqlite3_result_error16() as UTF16 in native
-** byte order. {F16414} If the third parameter to sqlite3_result_error()
+** byte order. If the third parameter to sqlite3_result_error()
** or sqlite3_result_error16() is negative then SQLite takes as the error
** message all text up through the first zero character.
-** {F16415} If the third parameter to sqlite3_result_error() or
+** If the third parameter to sqlite3_result_error() or
** sqlite3_result_error16() is non-negative then SQLite takes that many
** bytes (not characters) from the 2nd parameter as the error message.
-** {F16417} The sqlite3_result_error() and sqlite3_result_error16()
+** The sqlite3_result_error() and sqlite3_result_error16()
** routines make a copy private copy of the error message text before
-** they return. {END} Hence, the calling function can deallocate or
+** they return. Hence, the calling function can deallocate or
** modify the text after they return without harm.
+** The sqlite3_result_error_code() function changes the error code
+** returned by SQLite as a result of an error in a function. By default,
+** the error code is SQLITE_ERROR.
**
-** {F16421} The sqlite3_result_toobig() interface causes SQLite
+** The sqlite3_result_toobig() interface causes SQLite
** to throw an error indicating that a string or BLOB is to long
-** to represent. {F16422} The sqlite3_result_nomem() interface
+** to represent. The sqlite3_result_nomem() interface
** causes SQLite to throw an exception indicating that the a
** memory allocation failed.
**
-** {F16431} The sqlite3_result_int() interface sets the return value
+** The sqlite3_result_int() interface sets the return value
** of the application-defined function to be the 32-bit signed integer
** value given in the 2nd argument.
-** {F16432} The sqlite3_result_int64() interface sets the return value
+** The sqlite3_result_int64() interface sets the return value
** of the application-defined function to be the 64-bit signed integer
** value given in the 2nd argument.
**
-** {F16437} The sqlite3_result_null() interface sets the return value
+** The sqlite3_result_null() interface sets the return value
** of the application-defined function to be NULL.
**
-** {F16441} The sqlite3_result_text(), sqlite3_result_text16(),
+** The sqlite3_result_text(), sqlite3_result_text16(),
** sqlite3_result_text16le(), and sqlite3_result_text16be() interfaces
** set the return value of the application-defined function to be
** a text string which is represented as UTF-8, UTF-16 native byte order,
** UTF-16 little endian, or UTF-16 big endian, respectively.
-** {F16442} SQLite takes the text result from the application from
+** SQLite takes the text result from the application from
** the 2nd parameter of the sqlite3_result_text* interfaces.
-** {F16444} If the 3rd parameter to the sqlite3_result_text* interfaces
+** If the 3rd parameter to the sqlite3_result_text* interfaces
** is negative, then SQLite takes result text from the 2nd parameter
** through the first zero character.
-** {F16447} If the 3rd parameter to the sqlite3_result_text* interfaces
+** If the 3rd parameter to the sqlite3_result_text* interfaces
** is non-negative, then as many bytes (not characters) of the text
** pointed to by the 2nd parameter are taken as the application-defined
** function result.
-** {F16451} If the 4th parameter to the sqlite3_result_text* interfaces
+** If the 4th parameter to the sqlite3_result_text* interfaces
** or sqlite3_result_blob is a non-NULL pointer, then SQLite calls that
** function as the destructor on the text or blob result when it has
** finished using that result.
-** {F16453} If the 4th parameter to the sqlite3_result_text* interfaces
+** If the 4th parameter to the sqlite3_result_text* interfaces
** or sqlite3_result_blob is the special constant SQLITE_STATIC, then
** SQLite assumes that the text or blob result is constant space and
** does not copy the space or call a destructor when it has
** finished using that result.
-** {F16454} If the 4th parameter to the sqlite3_result_text* interfaces
+** If the 4th parameter to the sqlite3_result_text* interfaces
** or sqlite3_result_blob is the special constant SQLITE_TRANSIENT
** then SQLite makes a copy of the result into space obtained from
** from [sqlite3_malloc()] before it returns.
**
-** {F16461} The sqlite3_result_value() interface sets the result of
+** The sqlite3_result_value() interface sets the result of
** the application-defined function to be a copy the [sqlite3_value]
-** object specified by the 2nd parameter. {F16463} The
+** object specified by the 2nd parameter. The
** sqlite3_result_value() interface makes a copy of the [sqlite3_value]
** so that [sqlite3_value] specified in the parameter may change or
** be deallocated after sqlite3_result_value() returns without harm.
**
-** {U16491} These routines are called from within the different thread
+** If these routines are called from within the different thread
** than the one containing the application-defined function that recieved
** the [sqlite3_context] pointer, the results are undefined.
+**
+** INVARIANTS:
+**
+** {F16403} The default return value from any SQL function is NULL.
+**
+** {F16406} The [sqlite3_result_blob(C,V,N,D)] interface changes the
+** return value of function C to be a blob that is N bytes
+** in length and with content pointed to by V.
+**
+** {F16409} The [sqlite3_result_double(C,V)] interface changes the
+** return value of function C to be the floating point value V.
+**
+** {F16412} The [sqlite3_result_error(C,V,N)] interface changes the return
+** value of function C to be an exception with error code
+** [SQLITE_ERROR] and a UTF8 error message copied from V up to the
+** first zero byte or until N bytes are read if N is positive.
+**
+** {F16415} The [sqlite3_result_error16(C,V,N)] interface changes the return
+** value of function C to be an exception with error code
+** [SQLITE_ERROR] and a UTF16 native byte order error message
+** copied from V up to the first zero terminator or until N bytes
+** are read if N is positive.
+**
+** {F16418} The [sqlite3_result_error_toobig(C)] interface changes the return
+** value of the function C to be an exception with error code
+** [SQLITE_TOOBIG] and an appropriate error message.
+**
+** {F16421} The [sqlite3_result_error_nomem(C)] interface changes the return
+** value of the function C to be an exception with error code
+** [SQLITE_NOMEM] and an appropriate error message.
+**
+** {F16424} The [sqlite3_result_error_code(C,E)] interface changes the return
+** value of the function C to be an exception with error code E.
+** The error message text is unchanged.
+**
+** {F16427} The [sqlite3_result_int(C,V)] interface changes the
+** return value of function C to be the 32-bit integer value V.
+**
+** {F16430} The [sqlite3_result_int64(C,V)] interface changes the
+** return value of function C to be the 64-bit integer value V.
+**
+** {F16433} The [sqlite3_result_null(C)] interface changes the
+** return value of function C to be NULL.
+**
+** {F16436} The [sqlite3_result_text(C,V,N,D)] interface changes the
+** return value of function C to be the UTF8 string
+** V up through the first zero or until N bytes are read if N
+** is positive.
+**
+** {F16439} The [sqlite3_result_text16(C,V,N,D)] interface changes the
+** return value of function C to be the UTF16 native byte order
+** string V up through the first zero or until N bytes are read if N
+** is positive.
+**
+** {F16442} The [sqlite3_result_text16be(C,V,N,D)] interface changes the
+** return value of function C to be the UTF16 big-endian
+** string V up through the first zero or until N bytes are read if N
+** is positive.
+**
+** {F16445} The [sqlite3_result_text16le(C,V,N,D)] interface changes the
+** return value of function C to be the UTF16 little-endian
+** string V up through the first zero or until N bytes are read if N
+** is positive.
+**
+** {F16448} The [sqlite3_result_value(C,V)] interface changes the
+** return value of function C to be [sqlite3_value] object V.
+**
+** {F16451} The [sqlite3_result_zeroblob(C,N)] interface changes the
+** return value of function C to be an N-byte blob of all zeros.
+**
+** {F16454} The [sqlite3_result_error()] and [sqlite3_result_error16()]
+** interfaces make a copy of their error message strings before
+** returning.
+**
+** {F16457} If the D destructor parameter to [sqlite3_result_blob(C,V,N,D)],
+** [sqlite3_result_text(C,V,N,D)], [sqlite3_result_text16(C,V,N,D)],
+** [sqlite3_result_text16be(C,V,N,D)], or
+** [sqlite3_result_text16le(C,V,N,D)] is the constant [SQLITE_STATIC]
+** then no destructor is ever called on the pointer V and SQLite
+** assumes that V is immutable.
+**
+** {F16460} If the D destructor parameter to [sqlite3_result_blob(C,V,N,D)],
+** [sqlite3_result_text(C,V,N,D)], [sqlite3_result_text16(C,V,N,D)],
+** [sqlite3_result_text16be(C,V,N,D)], or
+** [sqlite3_result_text16le(C,V,N,D)] is the constant
+** [SQLITE_TRANSIENT] then the interfaces makes a copy of the
+** content of V and retains the copy.
+**
+** {F16463} If the D destructor parameter to [sqlite3_result_blob(C,V,N,D)],
+** [sqlite3_result_text(C,V,N,D)], [sqlite3_result_text16(C,V,N,D)],
+** [sqlite3_result_text16be(C,V,N,D)], or
+** [sqlite3_result_text16le(C,V,N,D)] is some value other than
+** the constants [SQLITE_STATIC] and [SQLITE_TRANSIENT] then
+** SQLite will invoke the destructor D with V as its only argument
+** when it has finished with the V value.
*/
void sqlite3_result_blob(sqlite3_context*, const void*, int, void(*)(void*));
void sqlite3_result_double(sqlite3_context*, double);
void sqlite3_result_error16(sqlite3_context*, const void*, int);
void sqlite3_result_error_toobig(sqlite3_context*);
void sqlite3_result_error_nomem(sqlite3_context*);
+void sqlite3_result_error_code(sqlite3_context*, int);
void sqlite3_result_int(sqlite3_context*, int);
void sqlite3_result_int64(sqlite3_context*, sqlite3_int64);
void sqlite3_result_null(sqlite3_context*);
/*
** CAPI3REF: Define New Collating Sequences {F16600}
**
-** {F16601}
** These functions are used to add new collation sequences to the
** [sqlite3*] handle specified as the first argument.
**
-** {F16602}
** The name of the new collation sequence is specified as a UTF-8 string
** for sqlite3_create_collation() and sqlite3_create_collation_v2()
-** and a UTF-16 string for sqlite3_create_collation16(). {F16603} In all cases
+** and a UTF-16 string for sqlite3_create_collation16(). In all cases
** the name is passed as the second function argument.
**
-** {F16604}
** The third argument may be one of the constants [SQLITE_UTF8],
** [SQLITE_UTF16LE] or [SQLITE_UTF16BE], indicating that the user-supplied
** routine expects to be passed pointers to strings encoded using UTF-8,
-** UTF-16 little-endian or UTF-16 big-endian respectively. {F16605} The
+** UTF-16 little-endian or UTF-16 big-endian respectively. The
** third argument might also be [SQLITE_UTF16_ALIGNED] to indicate that
** the routine expects pointers to 16-bit word aligned strings
** of UTF16 in the native byte order of the host computer.
**
-** {F16607}
** A pointer to the user supplied routine must be passed as the fifth
-** argument. {F16609} If it is NULL, this is the same as deleting the collation
+** argument. If it is NULL, this is the same as deleting the collation
** sequence (so that SQLite cannot call it anymore).
-** {F16611} Each time the application
+** Each time the application
** supplied function is invoked, it is passed a copy of the void* passed as
** the fourth argument to sqlite3_create_collation() or
** sqlite3_create_collation16() as its first parameter.
**
-** {F16612}
** The remaining arguments to the application-supplied routine are two strings,
-** each represented by a [length, data] pair and encoded in the encoding
+** each represented by a (length, data) pair and encoded in the encoding
** that was passed as the third argument when the collation sequence was
** registered. {END} The application defined collation routine should
** return negative, zero or positive if
** the first string is less than, equal to, or greater than the second
** string. i.e. (STRING1 - STRING2).
**
-** {F16615}
** The sqlite3_create_collation_v2() works like sqlite3_create_collation()
** excapt that it takes an extra argument which is a destructor for
-** the collation. {F16617} The destructor is called when the collation is
+** the collation. The destructor is called when the collation is
** destroyed and is passed a copy of the fourth parameter void* pointer
** of the sqlite3_create_collation_v2().
-** {F16618} Collations are destroyed when
+** Collations are destroyed when
** they are overridden by later calls to the collation creation functions
** or when the [sqlite3*] database handle is closed using [sqlite3_close()].
+**
+** INVARIANTS:
+**
+** {F16603} A successful call to the
+** [sqlite3_create_collation_v2(B,X,E,P,F,D)] interface
+** registers function F as the comparison function used to
+** implement collation X on [database connection] B for
+** databases having encoding E.
+**
+** {F16604} SQLite understands the X parameter to
+** [sqlite3_create_collation_v2(B,X,E,P,F,D)] as a zero-terminated
+** UTF-8 string in which case is ignored for ASCII characters and
+** is significant for non-ASCII characters.
+**
+** {F16606} Successive calls to [sqlite3_create_collation_v2(B,X,E,P,F,D)]
+** with the same values for B, X, and E, override prior values
+** of P, F, and D.
+**
+** {F16609} The destructor D in [sqlite3_create_collation_v2(B,X,E,P,F,D)]
+** is not NULL then it is called with argument P when the
+** collating function is dropped by SQLite.
+**
+** {F16612} A collating function is dropped when it is overloaded.
+**
+** {F16615} A collating function is dropped when the database connection
+** is closed using [sqlite3_close()].
+**
+** {F16618} The pointer P in [sqlite3_create_collation_v2(B,X,E,P,F,D)]
+** is passed through as the first parameter to the comparison
+** function F for all subsequent invocations of F.
+**
+** {F16621} A call to [sqlite3_create_collation(B,X,E,P,F)] is exactly
+** the same as a call to [sqlite3_create_collation_v2()] with
+** the same parameters and a NULL destructor.
+**
+** {F16624} Following a [sqlite3_create_collation_v2(B,X,E,P,F,D)],
+** SQLite uses the comparison function F for all text comparison
+** operations on [database connection] B on text values that
+** use the collating sequence name X.
+**
+** {F16627} The [sqlite3_create_collation16(B,X,E,P,F)] works the same
+** as [sqlite3_create_collation(B,X,E,P,F)] except that the
+** collation name X is understood as UTF-16 in native byte order
+** instead of UTF-8.
+**
+** {F16630} When multiple comparison functions are available for the same
+** collating sequence, SQLite chooses the one whose text encoding
+** requires the least amount of conversion from the default
+** text encoding of the database.
*/
int sqlite3_create_collation(
sqlite3*,
/*
** CAPI3REF: Collation Needed Callbacks {F16700}
**
-** {F16701}
** To avoid having to register all collation sequences before a database
** can be used, a single callback function may be registered with the
** database handle to be called whenever an undefined collation sequence is
** required.
**
-** {F16702}
** If the function is registered using the sqlite3_collation_needed() API,
** then it is passed the names of undefined collation sequences as strings
** encoded in UTF-8. {F16703} If sqlite3_collation_needed16() is used, the names
-** are passed as UTF-16 in machine native byte order. {F16704} A call to either
+** are passed as UTF-16 in machine native byte order. A call to either
** function replaces any existing callback.
**
-** {F16705} When the callback is invoked, the first argument passed is a copy
+** When the callback is invoked, the first argument passed is a copy
** of the second argument to sqlite3_collation_needed() or
-** sqlite3_collation_needed16(). {F16706} The second argument is the database
-** handle. {F16707} The third argument is one of [SQLITE_UTF8],
+** sqlite3_collation_needed16(). The second argument is the database
+** handle. The third argument is one of [SQLITE_UTF8],
** [SQLITE_UTF16BE], or [SQLITE_UTF16LE], indicating the most
** desirable form of the collation sequence function required.
-** {F16708} The fourth parameter is the name of the
-** required collation sequence. {END}
+** The fourth parameter is the name of the
+** required collation sequence.
**
** The callback function should register the desired collation using
** [sqlite3_create_collation()], [sqlite3_create_collation16()], or
** [sqlite3_create_collation_v2()].
+**
+** INVARIANTS:
+**
+** {F16702} A successful call to [sqlite3_collation_needed(D,P,F)]
+** or [sqlite3_collation_needed16(D,P,F)] causes
+** the [database connection] D to invoke callback F with first
+** parameter P whenever it needs a comparison function for a
+** collating sequence that it does not know about.
+**
+** {F16704} Each successful call to [sqlite3_collation_needed()] or
+** [sqlite3_collation_needed16()] overrides the callback registered
+** on the same [database connection] by prior calls to either
+** interface.
+**
+** {F16706} The name of the requested collating function passed in the
+** 4th parameter to the callback is in UTF-8 if the callback
+** was registered using [sqlite3_collation_needed()] and
+** is in UTF-16 native byte order if the callback was
+** registered using [sqlite3_collation_needed16()].
+**
+**
*/
int sqlite3_collation_needed(
sqlite3*,
/*
** CAPI3REF: Suspend Execution For A Short Time {F10530}
**
-** {F10531} The sqlite3_sleep() function
+** The sqlite3_sleep() function
** causes the current thread to suspend execution
** for at least a number of milliseconds specified in its parameter.
**
-** {F10532} If the operating system does not support sleep requests with
+** If the operating system does not support sleep requests with
** millisecond time resolution, then the time will be rounded up to
-** the nearest second. {F10533} The number of milliseconds of sleep actually
+** the nearest second. The number of milliseconds of sleep actually
** requested from the operating system is returned.
**
-** {F10534} SQLite implements this interface by calling the xSleep()
-** method of the default [sqlite3_vfs] object. {END}
+** SQLite implements this interface by calling the xSleep()
+** method of the default [sqlite3_vfs] object.
+**
+** INVARIANTS:
+**
+** {F10533} The [sqlite3_sleep(M)] interface invokes the xSleep
+** method of the default [sqlite3_vfs|VFS] in order to
+** suspend execution of the current thread for at least
+** M milliseconds.
+**
+** {F10536} The [sqlite3_sleep(M)] interface returns the number of
+** milliseconds of sleep actually requested of the operating
+** system, which might be larger than the parameter M.
*/
int sqlite3_sleep(int);
/*
** CAPI3REF: Test To See If The Database Is In Auto-Commit Mode {F12930}
**
-** {F12931} The sqlite3_get_autocommit() interfaces returns non-zero or
+** The sqlite3_get_autocommit() interfaces returns non-zero or
** zero if the given database connection is or is not in autocommit mode,
-** respectively. {F12932} Autocommit mode is on
-** by default. {F12933} Autocommit mode is disabled by a BEGIN statement.
-** {F12934} Autocommit mode is reenabled by a COMMIT or ROLLBACK. {END}
+** respectively. Autocommit mode is on
+** by default. Autocommit mode is disabled by a [BEGIN] statement.
+** Autocommit mode is reenabled by a [COMMIT] or [ROLLBACK].
**
** If certain kinds of errors occur on a statement within a multi-statement
** transactions (errors including [SQLITE_FULL], [SQLITE_IOERR],
** [SQLITE_NOMEM], [SQLITE_BUSY], and [SQLITE_INTERRUPT]) then the
-** transaction might be rolled back automatically. {F12935} The only way to
+** transaction might be rolled back automatically. The only way to
** find out if SQLite automatically rolled back the transaction after
-** an error is to use this function. {END}
+** an error is to use this function.
+**
+** INVARIANTS:
+**
+** {F12931} The [sqlite3_get_autocommit(D)] interface returns non-zero or
+** zero if the [database connection] D is or is not in autocommit
+** mode, respectively.
**
+** {F12932} Autocommit mode is on by default.
+**
+** {F12933} Autocommit mode is disabled by a successful [BEGIN] statement.
+**
+** {F12934} Autocommit mode is enabled by a successful [COMMIT] or [ROLLBACK]
+** statement.
+**
+**
+** LIMITATIONS:
+***
** {U12936} If another thread changes the autocommit status of the database
-** connection while this routine is running, then the return value
-** is undefined. {END}
+** connection while this routine is running, then the return value
+** is undefined.
*/
int sqlite3_get_autocommit(sqlite3*);
/*
** CAPI3REF: Find The Database Handle Of A Prepared Statement {F13120}
**
-** {F13121} The sqlite3_db_handle interface
+** The sqlite3_db_handle interface
** returns the [sqlite3*] database handle to which a
-** [sqlite3_stmt | prepared statement] belongs.
-** {F13122} the database handle returned by sqlite3_db_handle
+** [prepared statement] belongs.
+** The database handle returned by sqlite3_db_handle
** is the same database handle that was
** the first argument to the [sqlite3_prepare_v2()] or its variants
** that was used to create the statement in the first place.
+**
+** INVARIANTS:
+**
+** {F13123} The [sqlite3_db_handle(S)] interface returns a pointer
+** to the [database connection] associated with
+** [prepared statement] S.
*/
sqlite3 *sqlite3_db_handle(sqlite3_stmt*);
/*
** CAPI3REF: Commit And Rollback Notification Callbacks {F12950}
**
-** {F12951} The sqlite3_commit_hook() interface registers a callback
+** The sqlite3_commit_hook() interface registers a callback
** function to be invoked whenever a transaction is committed.
-** {F12952} Any callback set by a previous call to sqlite3_commit_hook()
+** Any callback set by a previous call to sqlite3_commit_hook()
** for the same database connection is overridden.
-** {F12953} The sqlite3_rollback_hook() interface registers a callback
+** The sqlite3_rollback_hook() interface registers a callback
** function to be invoked whenever a transaction is committed.
-** {F12954} Any callback set by a previous call to sqlite3_commit_hook()
+** Any callback set by a previous call to sqlite3_commit_hook()
** for the same database connection is overridden.
-** {F12956} The pArg argument is passed through
-** to the callback. {F12957} If the callback on a commit hook function
+** The pArg argument is passed through
+** to the callback. If the callback on a commit hook function
** returns non-zero, then the commit is converted into a rollback.
**
-** {F12958} If another function was previously registered, its
+** If another function was previously registered, its
** pArg value is returned. Otherwise NULL is returned.
**
-** {F12959} Registering a NULL function disables the callback.
+** Registering a NULL function disables the callback.
**
-** {F12961} For the purposes of this API, a transaction is said to have been
+** For the purposes of this API, a transaction is said to have been
** rolled back if an explicit "ROLLBACK" statement is executed, or
** an error or constraint causes an implicit rollback to occur.
-** {F12962} The rollback callback is not invoked if a transaction is
+** The rollback callback is not invoked if a transaction is
** automatically rolled back because the database connection is closed.
-** {F12964} The rollback callback is not invoked if a transaction is
+** The rollback callback is not invoked if a transaction is
** rolled back because a commit callback returned non-zero.
-** <todo> Check on this </todo> {END}
+** <todo> Check on this </todo>
**
** These are experimental interfaces and are subject to change.
+**
+** INVARIANTS:
+**
+** {F12951} The [sqlite3_commit_hook(D,F,P)] interface registers the
+** callback function F to be invoked with argument P whenever
+** a transaction commits on [database connection] D.
+**
+** {F12952} The [sqlite3_commit_hook(D,F,P)] interface returns the P
+** argument from the previous call with the same
+** [database connection ] D , or NULL on the first call
+** for a particular [database connection] D.
+**
+** {F12953} Each call to [sqlite3_commit_hook()] overwrites the callback
+** registered by prior calls.
+**
+** {F12954} If the F argument to [sqlite3_commit_hook(D,F,P)] is NULL
+** then the commit hook callback is cancelled and no callback
+** is invoked when a transaction commits.
+**
+** {F12955} If the commit callback returns non-zero then the commit is
+** converted into a rollback.
+**
+** {F12961} The [sqlite3_rollback_hook(D,F,P)] interface registers the
+** callback function F to be invoked with argument P whenever
+** a transaction rolls back on [database connection] D.
+**
+** {F12962} The [sqlite3_rollback_hook(D,F,P)] interface returns the P
+** argument from the previous call with the same
+** [database connection ] D , or NULL on the first call
+** for a particular [database connection] D.
+**
+** {F12963} Each call to [sqlite3_rollback_hook()] overwrites the callback
+** registered by prior calls.
+**
+** {F12964} If the F argument to [sqlite3_rollback_hook(D,F,P)] is NULL
+** then the rollback hook callback is cancelled and no callback
+** is invoked when a transaction rolls back.
*/
void *sqlite3_commit_hook(sqlite3*, int(*)(void*), void*);
void *sqlite3_rollback_hook(sqlite3*, void(*)(void *), void*);
/*
** CAPI3REF: Data Change Notification Callbacks {F12970}
**
-** {F12971} The sqlite3_update_hook() interface
+** The sqlite3_update_hook() interface
** registers a callback function with the database connection identified by the
** first argument to be invoked whenever a row is updated, inserted or deleted.
-** {F12972} Any callback set by a previous call to this function for the same
+** Any callback set by a previous call to this function for the same
** database connection is overridden.
**
-** {F12974} The second argument is a pointer to the function to invoke when a
+** The second argument is a pointer to the function to invoke when a
** row is updated, inserted or deleted.
-** {F12976} The first argument to the callback is
+** The first argument to the callback is
** a copy of the third argument to sqlite3_update_hook().
-** {F12977} The second callback
+** The second callback
** argument is one of [SQLITE_INSERT], [SQLITE_DELETE] or [SQLITE_UPDATE],
** depending on the operation that caused the callback to be invoked.
-** {F12978} The third and
+** The third and
** fourth arguments to the callback contain pointers to the database and
** table name containing the affected row.
-** {F12979} The final callback parameter is
+** The final callback parameter is
** the rowid of the row.
-** {F12981} In the case of an update, this is the rowid after
+** In the case of an update, this is the rowid after
** the update takes place.
**
-** {F12983} The update hook is not invoked when internal system tables are
+** The update hook is not invoked when internal system tables are
** modified (i.e. sqlite_master and sqlite_sequence).
**
-** {F12984} If another function was previously registered, its pArg value
-** is returned. {F12985} Otherwise NULL is returned.
+** If another function was previously registered, its pArg value
+** is returned. Otherwise NULL is returned.
+**
+** INVARIANTS:
+**
+** {F12971} The [sqlite3_update_hook(D,F,P)] interface causes callback
+** function F to be invoked with first parameter P whenever
+** a table row is modified, inserted, or deleted on
+** [database connection] D.
+**
+** {F12973} The [sqlite3_update_hook(D,F,P)] interface returns the value
+** of P for the previous call on the same [database connection] D,
+** or NULL for the first call.
+**
+** {F12975} If the update hook callback F in [sqlite3_update_hook(D,F,P)]
+** is NULL then the no update callbacks are made.
+**
+** {F12977} Each call to [sqlite3_update_hook(D,F,P)] overrides prior calls
+** to the same interface on the same [database connection] D.
+**
+** {F12979} The update hook callback is not invoked when internal system
+** tables such as sqlite_master and sqlite_sequence are modified.
+**
+** {F12981} The second parameter to the update callback
+** is one of [SQLITE_INSERT], [SQLITE_DELETE] or [SQLITE_UPDATE],
+** depending on the operation that caused the callback to be invoked.
+**
+** {F12983} The third and fourth arguments to the callback contain pointers
+** to zero-terminated UTF-8 strings which are the names of the
+** database and table that is being updated.
+
+** {F12985} The final callback parameter is the rowid of the row after
+** the change occurs.
*/
void *sqlite3_update_hook(
sqlite3*,
/*
** CAPI3REF: Enable Or Disable Shared Pager Cache {F10330}
**
-** {F10331}
** This routine enables or disables the sharing of the database cache
** and schema data structures between connections to the same database.
-** {F10332}
** Sharing is enabled if the argument is true and disabled if the argument
** is false.
**
-** {F10333} Cache sharing is enabled and disabled
+** Cache sharing is enabled and disabled
** for an entire process. {END} This is a change as of SQLite version 3.5.0.
** In prior versions of SQLite, sharing was
** enabled or disabled for each thread separately.
**
-** {F10334}
** The cache sharing mode set by this interface effects all subsequent
** calls to [sqlite3_open()], [sqlite3_open_v2()], and [sqlite3_open16()].
-** {F10335} Existing database connections continue use the sharing mode
-** that was in effect at the time they were opened. {END}
+** Existing database connections continue use the sharing mode
+** that was in effect at the time they were opened.
**
-** Virtual tables cannot be used with a shared cache. {F10336} When shared
+** Virtual tables cannot be used with a shared cache. When shared
** cache is enabled, the [sqlite3_create_module()] API used to register
-** virtual tables will always return an error. {END}
+** virtual tables will always return an error.
**
-** {F10337} This routine returns [SQLITE_OK] if shared cache was
-** enabled or disabled successfully. {F10338} An [SQLITE_ERROR | error code]
-** is returned otherwise. {END}
+** This routine returns [SQLITE_OK] if shared cache was
+** enabled or disabled successfully. An [error code]
+** is returned otherwise.
**
-** {F10339} Shared cache is disabled by default. {END} But this might change in
+** Shared cache is disabled by default. But this might change in
** future releases of SQLite. Applications that care about shared
** cache setting should set it explicitly.
+**
+** INVARIANTS:
+**
+** {F10331} A successful invocation of [sqlite3_enable_shared_cache(B)]
+** will enable or disable shared cache mode for any subsequently
+** created [database connection] in the same process.
+**
+** {F10336} When shared cache is enabled, the [sqlite3_create_module()]
+** interface will always return an error.
+**
+** {F10337} The [sqlite3_enable_shared_cache(B)] interface returns
+** [SQLITE_OK] if shared cache was enabled or disabled successfully.
+**
+** {F10339} Shared cache is disabled by default.
*/
int sqlite3_enable_shared_cache(int);
/*
** CAPI3REF: Attempt To Free Heap Memory {F17340}
**
-** {F17341} The sqlite3_release_memory() interface attempts to
+** The sqlite3_release_memory() interface attempts to
** free N bytes of heap memory by deallocating non-essential memory
** allocations held by the database labrary. {END} Memory used
** to cache database pages to improve performance is an example of
-** non-essential memory. {F16342} sqlite3_release_memory() returns
+** non-essential memory. Sqlite3_release_memory() returns
** the number of bytes actually freed, which might be more or less
** than the amount requested.
+**
+** INVARIANTS:
+**
+** {F17341} The [sqlite3_release_memory(N)] interface attempts to
+** free N bytes of heap memory by deallocating non-essential
+** memory allocations held by the database labrary.
+**
+** {F16342} The [sqlite3_release_memory(N)] returns the number
+** of bytes actually freed, which might be more or less
+** than the amount requested.
*/
int sqlite3_release_memory(int);
/*
** CAPI3REF: Impose A Limit On Heap Size {F17350}
**
-** {F16351} The sqlite3_soft_heap_limit() interface
+** The sqlite3_soft_heap_limit() interface
** places a "soft" limit on the amount of heap memory that may be allocated
-** by SQLite. {F16352} If an internal allocation is requested
+** by SQLite. If an internal allocation is requested
** that would exceed the soft heap limit, [sqlite3_release_memory()] is
** invoked one or more times to free up some space before the allocation
-** is made. {END}
+** is made.
**
-** {F16353} The limit is called "soft", because if
+** The limit is called "soft", because if
** [sqlite3_release_memory()] cannot
** free sufficient memory to prevent the limit from being exceeded,
** the memory is allocated anyway and the current operation proceeds.
**
-** {F16354}
** A negative or zero value for N means that there is no soft heap limit and
** [sqlite3_release_memory()] will only be called when memory is exhausted.
-** {F16355} The default value for the soft heap limit is zero.
+** The default value for the soft heap limit is zero.
**
** SQLite makes a best effort to honor the soft heap limit.
-** {F16356} But if the soft heap limit cannot honored, execution will
-** continue without error or notification. {END} This is why the limit is
+** But if the soft heap limit cannot honored, execution will
+** continue without error or notification. This is why the limit is
** called a "soft" limit. It is advisory only.
**
** Prior to SQLite version 3.5.0, this routine only constrained the memory
** allocated by a single thread - the same thread in which this routine
** runs. Beginning with SQLite version 3.5.0, the soft heap limit is
-** applied to all threads. {F16357} The value specified for the soft heap limit
-** is an upper bound on the total memory allocation for all threads. {END} In
+** applied to all threads. The value specified for the soft heap limit
+** is an upper bound on the total memory allocation for all threads. In
** version 3.5.0 there is no mechanism for limiting the heap usage for
** individual threads.
+**
+** INVARIANTS:
+**
+** {F16351} The [sqlite3_soft_heap_limit(N)] interface places a soft limit
+** of N bytes on the amount of heap memory that may be allocated
+** using [sqlite3_malloc()] or [sqlite3_realloc()] at any point
+** in time.
+**
+** {F16352} If a call to [sqlite3_malloc()] or [sqlite3_realloc()] would
+** cause the total amount of allocated memory to exceed the
+** soft heap limit, then [sqlite3_release_memory()] is invoked
+** in an attempt to reduce the memory usage prior to proceeding
+** with the memory allocation attempt.
+**
+** {F16353} Calls to [sqlite3_malloc()] or [sqlite3_realloc()] that trigger
+** attempts to reduce memory usage through the soft heap limit
+** mechanism continue even if the attempt to reduce memory
+** usage is unsuccessful.
+**
+** {F16354} A negative or zero value for N in a call to
+** [sqlite3_soft_heap_limit(N)] means that there is no soft
+** heap limit and [sqlite3_release_memory()] will only be
+** called when memory is completely exhausted.
+**
+** {F16355} The default value for the soft heap limit is zero.
+**
+** {F16358} Each call to [sqlite3_soft_heap_limit(N)] overrides the
+** values set by all prior calls.
*/
void sqlite3_soft_heap_limit(int);
**
** {F12661} This function disables all previously registered
** automatic extensions. {END} This
-** routine undoes the effect of all prior [sqlite3_automatic_extension()]
+** routine undoes the effect of all prior [sqlite3_auto_extension()]
** calls.
**
** {F12662} This call disabled automatic extensions in all threads. {END}
typedef struct sqlite3_module sqlite3_module;
/*
+** CAPI3REF: Virtual Table Object {F18000}
+** KEYWORDS: sqlite3_module
+**
** A module is a class of virtual tables. Each module is defined
** by an instance of the following structure. This structure consists
** mostly of methods for the module.
};
/*
+** CAPI3REF: Virtual Table Indexing Information {F18100}
+** KEYWORDS: sqlite3_index_info
+**
** The sqlite3_index_info structure and its substructures is used to
** pass information into and receive the reply from the xBestIndex
** method of an sqlite3_module. The fields under **Inputs** are the
#define SQLITE_INDEX_CONSTRAINT_MATCH 64
/*
+** CAPI3REF: Register A Virtual Table Implementation {F18200}
+**
** This routine is used to register a new module name with an SQLite
** connection. Module names must be registered before creating new
** virtual tables on the module, or before using preexisting virtual
);
/*
+** CAPI3REF: Register A Virtual Table Implementation {F18210}
+**
** This routine is identical to the sqlite3_create_module() method above,
** except that it allows a destructor function to be specified. It is
** even more experimental than the rest of the virtual tables API.
);
/*
+** CAPI3REF: Virtual Table Instance Object {F18010}
+** KEYWORDS: sqlite3_vtab
+**
** Every module implementation uses a subclass of the following structure
** to describe a particular instance of the module. Each subclass will
** be tailored to the specific needs of the module implementation. The
/* Virtual table implementations will typically add additional fields */
};
-/* Every module implementation uses a subclass of the following structure
+/*
+** CAPI3REF: Virtual Table Cursor Object {F18020}
+** KEYWORDS: sqlite3_vtab_cursor
+**
+** Every module implementation uses a subclass of the following structure
** to describe cursors that point into the virtual table and are used
** to loop through the virtual table. Cursors are created using the
** xOpen method of the module. Each module implementation will define
};
/*
+** CAPI3REF: Declare The Schema Of A Virtual Table {F18280}
+**
** The xCreate and xConnect methods of a module use the following API
** to declare the format (the names and datatypes of the columns) of
** the virtual tables they implement.
int sqlite3_declare_vtab(sqlite3*, const char *zCreateTable);
/*
+** CAPI3REF: Overload A Function For A Virtual Table {F18300}
+**
** Virtual tables can provide alternative implementations of functions
** using the xFindFunction method. But global versions of those functions
** must exist in order to be overloaded.
/*
** CAPI3REF: A Handle To An Open BLOB {F17800}
**
-** An instance of the following opaque structure is used to
-** represent an blob-handle. A blob-handle is created by
+** An instance of this object represents an open BLOB on which
+** incremental I/O can be preformed.
+** Objects of this type are created by
** [sqlite3_blob_open()] and destroyed by [sqlite3_blob_close()].
** The [sqlite3_blob_read()] and [sqlite3_blob_write()] interfaces
** can be used to read or write small subsections of the blob.
/*
** CAPI3REF: Open A BLOB For Incremental I/O {F17810}
**
-** {F17811} This interfaces opens a handle to the blob located
+** This interfaces opens a handle to the blob located
** in row iRow,, column zColumn, table zTable in database zDb;
** in other words, the same blob that would be selected by:
**
** SELECT zColumn FROM zDb.zTable WHERE rowid = iRow;
** </pre> {END}
**
-** {F17812} If the flags parameter is non-zero, the blob is opened for
+** If the flags parameter is non-zero, the blob is opened for
** read and write access. If it is zero, the blob is opened for read
-** access. {END}
+** access.
**
-** {F17813} On success, [SQLITE_OK] is returned and the new
+** On success, [SQLITE_OK] is returned and the new
** [sqlite3_blob | blob handle] is written to *ppBlob.
-** {F17814} Otherwise an error code is returned and
+** Otherwise an error code is returned and
** any value written to *ppBlob should not be used by the caller.
-** {F17815} This function sets the database-handle error code and message
+** This function sets the database-handle error code and message
** accessible via [sqlite3_errcode()] and [sqlite3_errmsg()].
-** <todo>We should go through and mark all interfaces that behave this
-** way with a similar statement</todo>
+**
+** INVARIANTS:
+**
+** {F17813} A successful invocation of the [sqlite3_blob_open(D,B,T,C,R,F,P)]
+** interface opens an [sqlite3_blob] object P on the blob
+** in column C of table T in database B on [database connection] D.
+**
+** {F17814} A successful invocation of [sqlite3_blob_open(D,...)] starts
+** a new transaction on [database connection] D if that connection
+** is not already in a transaction.
+**
+** {F17816} The [sqlite3_blob_open(D,B,T,C,R,F,P)] interface opens the blob
+** for read and write access if and only if the F parameter
+** is non-zero.
+**
+** {F17819} The [sqlite3_blob_open()] interface returns [SQLITE_OK] on
+** success and an appropriate [error code] on failure.
+**
+** {F17821} If an error occurs during evaluation of [sqlite3_blob_open(D,...)]
+** then subsequent calls to [sqlite3_errcode(D)],
+** [sqlite3_errmsg(D)], and [sqlite3_errmsg16(D)] will return
+** information approprate for that error.
*/
int sqlite3_blob_open(
sqlite3*,
**
** Close an open [sqlite3_blob | blob handle].
**
-** {F17831} Closing a BLOB shall cause the current transaction to commit
+** Closing a BLOB shall cause the current transaction to commit
** if there are no other BLOBs, no pending prepared statements, and the
** database connection is in autocommit mode.
-** {F17832} If any writes were made to the BLOB, they might be held in cache
+** If any writes were made to the BLOB, they might be held in cache
** until the close operation if they will fit. {END}
** Closing the BLOB often forces the changes
** out to disk and so if any I/O errors occur, they will likely occur
** at the time when the BLOB is closed. {F17833} Any errors that occur during
** closing are reported as a non-zero return value.
**
-** {F17839} The BLOB is closed unconditionally. Even if this routine returns
+** The BLOB is closed unconditionally. Even if this routine returns
** an error code, the BLOB is still closed.
+**
+** INVARIANTS:
+**
+** {F17833} The [sqlite3_blob_close(P)] interface closes an
+** [sqlite3_blob] object P previously opened using
+** [sqlite3_blob_open()].
+**
+** {F17836} Closing an [sqlite3_blob] object using
+** [sqlite3_blob_close()] shall cause the current transaction to
+** commit if there are no other open [sqlite3_blob] objects
+** or [prepared statements] on the same [database connection] and
+** the [database connection] is in
+** [sqlite3_get_autocommit | autocommit mode].
+**
+** {F17839} The [sqlite3_blob_close(P)] interfaces closes the
+** [sqlite3_blob] object P unconditionally, even if
+** [sqlite3_blob_close(P)] returns something other than [SQLITE_OK].
+**
*/
int sqlite3_blob_close(sqlite3_blob *);
/*
-** CAPI3REF: Return The Size Of An Open BLOB {F17805}
+** CAPI3REF: Return The Size Of An Open BLOB {F17840}
+**
+** Return the size in bytes of the blob accessible via the open
+** [sqlite3_blob] object in its only argument.
**
-** {F16806} Return the size in bytes of the blob accessible via the open
-** [sqlite3_blob | blob-handle] passed as an argument.
+** INVARIANTS:
+**
+** {F17843} The [sqlite3_blob_bytes(P)] interface returns the size
+** in bytes of the BLOB that the [sqlite3_blob] object P
+** refers to.
*/
int sqlite3_blob_bytes(sqlite3_blob *);
**
** This function is used to read data from an open
** [sqlite3_blob | blob-handle] into a caller supplied buffer.
-** {F17851} n bytes of data are copied into buffer
-** z from the open blob, starting at offset iOffset.
+** N bytes of data are copied into buffer
+** Z from the open blob, starting at offset iOffset.
**
-** {F17852} If offset iOffset is less than n bytes from the end of the blob,
-** [SQLITE_ERROR] is returned and no data is read. {F17853} If n is
+** If offset iOffset is less than N bytes from the end of the blob,
+** [SQLITE_ERROR] is returned and no data is read. If N or iOffset is
** less than zero [SQLITE_ERROR] is returned and no data is read.
**
-** {F17854} On success, SQLITE_OK is returned. Otherwise, an
-** [SQLITE_ERROR | SQLite error code] or an
-** [SQLITE_IOERR_READ | extended error code] is returned.
+** On success, SQLITE_OK is returned. Otherwise, an
+** [error code] or an [extended error code] is returned.
+**
+** INVARIANTS:
+**
+** {F17853} The [sqlite3_blob_read(P,Z,N,X)] interface reads N bytes
+** beginning at offset X from
+** the blob that [sqlite3_blob] object P refers to
+** and writes those N bytes into buffer Z.
+**
+** {F17856} In [sqlite3_blob_read(P,Z,N,X)] if the size of the blob
+** is less than N+X bytes, then the function returns [SQLITE_ERROR]
+** and nothing is read from the blob.
+**
+** {F17859} In [sqlite3_blob_read(P,Z,N,X)] if X or N is less than zero
+** then the function returns [SQLITE_ERROR]
+** and nothing is read from the blob.
+**
+** {F17862} The [sqlite3_blob_read(P,Z,N,X)] interface returns [SQLITE_OK]
+** if N bytes where successfully read into buffer Z.
+**
+** {F17865} If the requested read could not be completed,
+** the [sqlite3_blob_read(P,Z,N,X)] interface returns an
+** appropriate [error code] or [extended error code].
+**
+** {F17868} If an error occurs during evaluation of [sqlite3_blob_read(D,...)]
+** then subsequent calls to [sqlite3_errcode(D)],
+** [sqlite3_errmsg(D)], and [sqlite3_errmsg16(D)] will return
+** information approprate for that error.
*/
-int sqlite3_blob_read(sqlite3_blob *, void *z, int n, int iOffset);
+int sqlite3_blob_read(sqlite3_blob *, void *Z, int N, int iOffset);
/*
** CAPI3REF: Write Data Into A BLOB Incrementally {F17870}
**
** This function is used to write data into an open
** [sqlite3_blob | blob-handle] from a user supplied buffer.
-** {F17871} n bytes of data are copied from the buffer
+** n bytes of data are copied from the buffer
** pointed to by z into the open blob, starting at offset iOffset.
**
-** {F17872} If the [sqlite3_blob | blob-handle] passed as the first argument
+** If the [sqlite3_blob | blob-handle] passed as the first argument
** was not opened for writing (the flags parameter to [sqlite3_blob_open()]
*** was zero), this function returns [SQLITE_READONLY].
**
-** {F17873} This function may only modify the contents of the blob; it is
+** This function may only modify the contents of the blob; it is
** not possible to increase the size of a blob using this API.
-** {F17874} If offset iOffset is less than n bytes from the end of the blob,
-** [SQLITE_ERROR] is returned and no data is written. {F17875} If n is
+** If offset iOffset is less than n bytes from the end of the blob,
+** [SQLITE_ERROR] is returned and no data is written. If n is
** less than zero [SQLITE_ERROR] is returned and no data is written.
**
-** {F17876} On success, SQLITE_OK is returned. Otherwise, an
-** [SQLITE_ERROR | SQLite error code] or an
-** [SQLITE_IOERR_READ | extended error code] is returned.
+** On success, SQLITE_OK is returned. Otherwise, an
+** [error code] or an [extended error code] is returned.
+**
+** INVARIANTS:
+**
+** {F17873} The [sqlite3_blob_write(P,Z,N,X)] interface writes N bytes
+** from buffer Z into
+** the blob that [sqlite3_blob] object P refers to
+** beginning at an offset of X into the blob.
+**
+** {F17875} The [sqlite3_blob_write(P,Z,N,X)] interface returns
+** [SQLITE_READONLY] if the [sqlite3_blob] object P was
+** [sqlite3_blob_open | opened] for reading only.
+**
+** {F17876} In [sqlite3_blob_write(P,Z,N,X)] if the size of the blob
+** is less than N+X bytes, then the function returns [SQLITE_ERROR]
+** and nothing is written into the blob.
+**
+** {F17879} In [sqlite3_blob_write(P,Z,N,X)] if X or N is less than zero
+** then the function returns [SQLITE_ERROR]
+** and nothing is written into the blob.
+**
+** {F17882} The [sqlite3_blob_write(P,Z,N,X)] interface returns [SQLITE_OK]
+** if N bytes where successfully written into blob.
+**
+** {F17885} If the requested write could not be completed,
+** the [sqlite3_blob_write(P,Z,N,X)] interface returns an
+** appropriate [error code] or [extended error code].
+**
+** {F17888} If an error occurs during evaluation of [sqlite3_blob_write(D,...)]
+** then subsequent calls to [sqlite3_errcode(D)],
+** [sqlite3_errmsg(D)], and [sqlite3_errmsg16(D)] will return
+** information approprate for that error.
*/
int sqlite3_blob_write(sqlite3_blob *, const void *z, int n, int iOffset);
**
** A virtual filesystem (VFS) is an [sqlite3_vfs] object
** that SQLite uses to interact
-** with the underlying operating system. Most builds come with a
+** with the underlying operating system. Most SQLite builds come with a
** single default VFS that is appropriate for the host computer.
** New VFSes can be registered and existing VFSes can be unregistered.
** The following interfaces are provided.
**
-** {F11201} The sqlite3_vfs_find() interface returns a pointer to
-** a VFS given its name. {F11202} Names are case sensitive.
-** {F11203} Names are zero-terminated UTF-8 strings.
-** {F11204} If there is no match, a NULL
-** pointer is returned. {F11205} If zVfsName is NULL then the default
-** VFS is returned. {END}
-**
-** {F11210} New VFSes are registered with sqlite3_vfs_register().
-** {F11211} Each new VFS becomes the default VFS if the makeDflt flag is set.
-** {F11212} The same VFS can be registered multiple times without injury.
-** {F11213} To make an existing VFS into the default VFS, register it again
-** with the makeDflt flag set. {U11214} If two different VFSes with the
-** same name are registered, the behavior is undefined. {U11215} If a
+** The sqlite3_vfs_find() interface returns a pointer to
+** a VFS given its name. Names are case sensitive.
+** Names are zero-terminated UTF-8 strings.
+** If there is no match, a NULL
+** pointer is returned. If zVfsName is NULL then the default
+** VFS is returned.
+**
+** New VFSes are registered with sqlite3_vfs_register().
+** Each new VFS becomes the default VFS if the makeDflt flag is set.
+** The same VFS can be registered multiple times without injury.
+** To make an existing VFS into the default VFS, register it again
+** with the makeDflt flag set. If two different VFSes with the
+** same name are registered, the behavior is undefined. If a
** VFS is registered with a name that is NULL or an empty string,
** then the behavior is undefined.
**
-** {F11220} Unregister a VFS with the sqlite3_vfs_unregister() interface.
-** {F11221} If the default VFS is unregistered, another VFS is chosen as
+** Unregister a VFS with the sqlite3_vfs_unregister() interface.
+** If the default VFS is unregistered, another VFS is chosen as
** the default. The choice for the new VFS is arbitrary.
+**
+** INVARIANTS:
+**
+** {F11203} The [sqlite3_vfs_find(N)] interface returns a pointer to the
+** registered [sqlite3_vfs] object whose name exactly matches
+** the zero-terminated UTF-8 string N, or it returns NULL if
+** there is no match.
+**
+** {F11206} If the N parameter to [sqlite3_vfs_find(N)] is NULL then
+** the function returns a pointer to the default [sqlite3_vfs]
+** object if there is one, or NULL if there is no default
+** [sqlite3_vfs] object.
+**
+** {F11209} The [sqlite3_vfs_register(P,F)] interface registers the
+** well-formed [sqlite3_vfs] object P using the name given
+** by the zName field of the object.
+**
+** {F11212} Using the [sqlite3_vfs_register(P,F)] interface to register
+** the same [sqlite3_vfs] object multiple times is a harmless no-op.
+**
+** {F11215} The [sqlite3_vfs_register(P,F)] interface makes the
+** the [sqlite3_vfs] object P the default [sqlite3_vfs] object
+** if F is non-zero.
+**
+** {F11218} The [sqlite3_vfs_unregister(P)] interface unregisters the
+** [sqlite3_vfs] object P so that it is no longer returned by
+** subsequent calls to [sqlite3_vfs_find()].
*/
sqlite3_vfs *sqlite3_vfs_find(const char *zVfsName);
int sqlite3_vfs_register(sqlite3_vfs*, int makeDflt);
int sqlite3_file_control(sqlite3*, const char *zDbName, int op, void*);
/*
+** CAPI3REF: Testing Interface {F11400}
+**
+** The sqlite3_test_control() interface is used to read out internal
+** state of SQLite and to inject faults into SQLite for testing
+** purposes. The first parameter a operation code that determines
+** the number, meaning, and operation of all subsequent parameters.
+**
+** This interface is not for use by applications. It exists solely
+** for verifying the correct operation of the SQLite library. Depending
+** on how the SQLite library is compiled, this interface might not exist.
+**
+** The details of the operation codes, their meanings, the parameters
+** they take, and what they do are all subject to change without notice.
+** Unlike most of the SQLite API, this function is not guaranteed to
+** operate consistently from one release to the next.
+*/
+int sqlite3_test_control(int op, ...);
+
+/*
+** CAPI3REF: Testing Interface Operation Codes {F11410}
+**
+** These constants are the valid operation code parameters used
+** as the first argument to [sqlite3_test_control()].
+**
+** These parameters and their meansing are subject to change
+** without notice. These values are for testing purposes only.
+** Applications should not use any of these parameters or the
+** [sqlite3_test_control()] interface.
+*/
+#define SQLITE_TESTCTRL_FAULT_CONFIG 1
+#define SQLITE_TESTCTRL_FAULT_FAILURES 2
+#define SQLITE_TESTCTRL_FAULT_BENIGN_FAILURES 3
+#define SQLITE_TESTCTRL_FAULT_PENDING 4
+
+
+
+
+
+/*
** Undo the hack that converts floating point types to integer for
** builds on processors without floating point support.
*/
projects / fms.git / blobdiff