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Comment:Update the documentation comment in sqlite.h.in for sqlite3_preupdate_hook().
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SHA1: 7f8570208c06c056d426e9299d9930181a0464f8
User & Date: dan 2017-02-01 14:19:43
Context
2017-02-01
15:19
Fix the build by making the OPFLAG_ISNOOP macro available unconditionally. check-in: 510933cb user: drh tags: trunk
14:19
Update the documentation comment in sqlite.h.in for sqlite3_preupdate_hook(). check-in: 7f857020 user: dan tags: trunk
14:10
Changes so that the pre-update hook and the sessions module work with WITHOUT ROWID tables. check-in: 964bdc27 user: dan tags: trunk
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Changes to src/sqlite.h.in.

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** CAPI3REF: The pre-update hook.
**
** ^These interfaces are only available if SQLite is compiled using the
** [SQLITE_ENABLE_PREUPDATE_HOOK] compile-time option.
**
** ^The [sqlite3_preupdate_hook()] interface registers a callback function
** that is invoked prior to each [INSERT], [UPDATE], and [DELETE] operation
** on a [rowid table].
** ^At most one preupdate hook may be registered at a time on a single
** [database connection]; each call to [sqlite3_preupdate_hook()] overrides
** the previous setting.
** ^The preupdate hook is disabled by invoking [sqlite3_preupdate_hook()]
** with a NULL pointer as the second parameter.
** ^The third parameter to [sqlite3_preupdate_hook()] is passed through as
** the first parameter to callbacks.
**
** ^The preupdate hook only fires for changes to [rowid tables]; the preupdate
** hook is not invoked for changes to [virtual tables] or [WITHOUT ROWID]
** tables.
**
** ^The second parameter to the preupdate callback is a pointer to
** the [database connection] that registered the preupdate hook.
** ^The third parameter to the preupdate callback is one of the constants
** [SQLITE_INSERT], [SQLITE_DELETE], or [SQLITE_UPDATE] to identify the
** kind of update operation that is about to occur.
** ^(The fourth parameter to the preupdate callback is the name of the
** database within the database connection that is being modified.  This
** will be "main" for the main database or "temp" for TEMP tables or 
** the name given after the AS keyword in the [ATTACH] statement for attached
** databases.)^
** ^The fifth parameter to the preupdate callback is the name of the
** table that is being modified.


** ^The sixth parameter to the preupdate callback is the initial [rowid] of the
** row being changes for SQLITE_UPDATE and SQLITE_DELETE changes and is
** undefined for SQLITE_INSERT changes.
** ^The seventh parameter to the preupdate callback is the final [rowid] of
** the row being changed for SQLITE_UPDATE and SQLITE_INSERT changes and is
** undefined for SQLITE_DELETE changes.




**
** The [sqlite3_preupdate_old()], [sqlite3_preupdate_new()],
** [sqlite3_preupdate_count()], and [sqlite3_preupdate_depth()] interfaces
** provide additional information about a preupdate event. These routines
** may only be called from within a preupdate callback.  Invoking any of
** these routines from outside of a preupdate callback or with a
** [database connection] pointer that is different from the one supplied







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** CAPI3REF: The pre-update hook.
**
** ^These interfaces are only available if SQLite is compiled using the
** [SQLITE_ENABLE_PREUPDATE_HOOK] compile-time option.
**
** ^The [sqlite3_preupdate_hook()] interface registers a callback function
** that is invoked prior to each [INSERT], [UPDATE], and [DELETE] operation
** on a database table.
** ^At most one preupdate hook may be registered at a time on a single
** [database connection]; each call to [sqlite3_preupdate_hook()] overrides
** the previous setting.
** ^The preupdate hook is disabled by invoking [sqlite3_preupdate_hook()]
** with a NULL pointer as the second parameter.
** ^The third parameter to [sqlite3_preupdate_hook()] is passed through as
** the first parameter to callbacks.
**
** ^The preupdate hook only fires for changes to real database tables; the
** preupdate hook is not invoked for changes to [virtual tables] or to
** system tables like sqlite_master or sqlite_stat1.
**
** ^The second parameter to the preupdate callback is a pointer to
** the [database connection] that registered the preupdate hook.
** ^The third parameter to the preupdate callback is one of the constants
** [SQLITE_INSERT], [SQLITE_DELETE], or [SQLITE_UPDATE] to identify the
** kind of update operation that is about to occur.
** ^(The fourth parameter to the preupdate callback is the name of the
** database within the database connection that is being modified.  This
** will be "main" for the main database or "temp" for TEMP tables or 
** the name given after the AS keyword in the [ATTACH] statement for attached
** databases.)^
** ^The fifth parameter to the preupdate callback is the name of the
** table that is being modified.
**
** For an UPDATE or DELETE operation on a [rowid table], the sixth
** parameter passed to the preupdate callback is the initial [rowid] of the 


** row being modified or deleted. For an INSERT operation on a rowid table,
** or any operation on a WITHOUT ROWID table, the value of the sixth 
** parameter is undefined. For an INSERT or UPDATE on a rowid table the
** seventh parameter is the final rowid value of the row being inserted
** or updated. The value of the seventh parameter passed to the callback
** function is not defined for operations on WITHOUT ROWID tables, or for
** INSERT operations on rowid tables.
**
** The [sqlite3_preupdate_old()], [sqlite3_preupdate_new()],
** [sqlite3_preupdate_count()], and [sqlite3_preupdate_depth()] interfaces
** provide additional information about a preupdate event. These routines
** may only be called from within a preupdate callback.  Invoking any of
** these routines from outside of a preupdate callback or with a
** [database connection] pointer that is different from the one supplied