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Add the "indirect flag" to the changeset blob format. Also the sqlite3session_indirect() API.

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FossilOrigin-Name: 1feaf2d35fd9ec777319717ae2c2929d66fe7baa
This commit is contained in:
dan
2011-03-23 16:03:11 +00:00
parent 1e7a2d4315
commit b4480e942f
8 changed files with 260 additions and 85 deletions
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43
ext/session/sqlite3session.h
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@ -90,6 +90,35 @@ void sqlite3session_delete(sqlite3_session *pSession);
*/
int sqlite3session_enable(sqlite3_session *pSession, int bEnable);
/*
** CAPI3REF: Set Or Clear the Indirect Change Flag
**
** Each change recorded by a session object is marked as either direct or
** indirect. A change is marked as indirect if either:
**
** <ul>
** <li> The session object "indirect" flag is set when the change is
** made, or
** <li> The change is made by an SQL trigger or foreign key action
** instead of directly as a result of a users SQL statement.
** </ul>
**
** If a single row is affected by more than one operation within a session,
** then the change is considered indirect if all operations meet the criteria
** for an indirect change above, or direct otherwise.
**
** This function is used to set, clear or query the session object indirect
** flag. If the second argument passed to this function is zero, then the
** indirect flag is cleared. If it is greater than zero, the indirect flag
** is set. Passing a value less than zero does not modify the current value
** of the indirect flag, and may be used to query the current state of the
** indirect flag for the specified session object.
**
** The return value indicates the final state of the indirect flag: 0 if
** it is clear, or 1 if it is set.
*/
int sqlite3session_indirect(sqlite3_session *pSession, int bIndirect);
/*
** CAPI3REF: Attach A Table To A Session Object
**
@ -292,10 +321,13 @@ int sqlite3changeset_next(sqlite3_changeset_iter *pIter);
** affected by the current change. The buffer remains valid until either
** sqlite3changeset_next() is called on the iterator or until the
** conflict-handler function returns. If pnCol is not NULL, then *pnCol is
** set to the number of columns in the table affected by the change. Finally,
** if pOp is not NULL, then *pOp is set to one of [SQLITE_INSERT],
** [SQLITE_DELETE] or [SQLITE_UPDATE], depending on the type of change that
** the iterator currently points to.
** set to the number of columns in the table affected by the change. If
** pbIncorrect is not NULL, then *pbIndirect is set to true (1) if the change
** is an indirect change, or false (0) otherwise. See the documentation for
** [sqlite3session_indirect()] for a description of direct and indirect
** changes. Finally, if pOp is not NULL, then *pOp is set to one of
** [SQLITE_INSERT], [SQLITE_DELETE] or [SQLITE_UPDATE], depending on the
** type of change that the iterator currently points to.
**
** If no error occurs, SQLITE_OK is returned. If an error does occur, an
** SQLite error code is returned. The values of the output variables may not
@ -305,7 +337,8 @@ int sqlite3changeset_op(
sqlite3_changeset_iter *pIter, /* Iterator object */
const char **pzTab, /* OUT: Pointer to table name */
int *pnCol, /* OUT: Number of columns in table */
int *pOp /* OUT: SQLITE_INSERT, DELETE or UPDATE */
int *pOp, /* OUT: SQLITE_INSERT, DELETE or UPDATE */
int *pbIndirect /* OUT: True for an 'indirect' change */
);
/*