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Add comments and prototype for experimental sqlite_last_statement_changes() API function. Also, allow function to be called from tcl. (CVS 1273)

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FossilOrigin-Name: ca99920b0dbf773962b47766d690154fd1276513
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rdc
2004-02-25 22:51:06 +00:00
parent 268380ca9e
commit f146a77677
7 changed files with 91 additions and 28 deletions
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28
src/sqlite.h.in
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@@ -12,7 +12,7 @@
** This header file defines the interface that the SQLite library
** presents to client programs.
**
** @(#) $Id: sqlite.h.in,v 1.58 2004/02/25 13:47:33 drh Exp $
** @(#) $Id: sqlite.h.in,v 1.59 2004/02/25 22:51:06 rdc Exp $
*/
#ifndef _SQLITE_H_
#define _SQLITE_H_
@@ -204,6 +204,32 @@ int sqlite_last_insert_rowid(sqlite*);
*/
int sqlite_changes(sqlite*);
/*
** This function returns the number of database rows that were changed
** by the last INSERT, UPDATE, or DELETE statment executed by sqlite_exec(),
** or by the last VM to run to completion. The change count is not updated
** by SQL statements other than INSERT, UPDATE or DELETE.
**
** Changes are counted, even if they are later undone by a ROLLBACK or
** ABORT. Changes associated with trigger programs that execute as a
** result of the INSERT, UPDATE, or DELETE statement are not counted.
**
** If a callback invokes sqlite_exec() recursively, then the changes
** in the inner, recursive call are counted together with the changes
** in the outer call.
**
** 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
** 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.
**
******* THIS IS AN EXPERIMENTAL API AND IS SUBJECT TO CHANGE ******
*/
int sqlite_last_statement_changes(sqlite*);
/* If the parameter to this routine is one of the return value constants
** defined above, then this routine returns a constant text string which
** descripts (in English) the meaning of the return value.