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Replace OP_List with OP_Fifo. This is the first step toward allowing

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recursive delete triggers and later foreign keys with cascading deletes. (CVS 2538)

FossilOrigin-Name: 94c120bb782fed53142317d1755e70c858930486
This commit is contained in:
drh
2005-07-08 13:07:59 +00:00
parent 9f18e8a0c4
commit a01f79df49
10 changed files with 192 additions and 129 deletions
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12
src/delete.c
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@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.107 2005/06/24 03:53:06 drh Exp $
** $Id: delete.c,v 1.108 2005/07/08 13:08:00 drh Exp $
*/
#include "sqliteInt.h"
@@ -240,7 +240,7 @@ void sqlite3DeleteFrom(
/* Remember the rowid of every item to be deleted.
*/
sqlite3VdbeAddOp(v, OP_Rowid, iCur, 0);
sqlite3VdbeAddOp(v, OP_ListWrite, 0, 0);
sqlite3VdbeAddOp(v, OP_FifoWrite, 0, 0);
if( db->flags & SQLITE_CountRows ){
sqlite3VdbeAddOp(v, OP_AddImm, 1, 0);
}
@@ -260,14 +260,13 @@ void sqlite3DeleteFrom(
** database scan. We have to delete items after the scan is complete
** because deleting an item can change the scan order.
*/
sqlite3VdbeAddOp(v, OP_ListRewind, 0, 0);
end = sqlite3VdbeMakeLabel(v);
/* This is the beginning of the delete loop when there are
** row triggers.
*/
if( triggers_exist ){
addr = sqlite3VdbeAddOp(v, OP_ListRead, 0, end);
addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, end);
if( !isView ){
sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
sqlite3OpenTableForReading(v, iCur, pTab);
@@ -288,7 +287,7 @@ void sqlite3DeleteFrom(
if( !isView ){
/* Open cursors for the table we are deleting from and all its
** indices. If there are row triggers, this happens inside the
** OP_ListRead loop because the cursor have to all be closed
** OP_FifoRead loop because the cursor have to all be closed
** before the trigger fires. If there are no row triggers, the
** cursors are opened only once on the outside the loop.
*/
@@ -297,7 +296,7 @@ void sqlite3DeleteFrom(
/* This is the beginning of the delete loop when there are no
** row triggers */
if( !triggers_exist ){
addr = sqlite3VdbeAddOp(v, OP_ListRead, 0, end);
addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, end);
}
/* Delete the row */
@@ -322,7 +321,6 @@ void sqlite3DeleteFrom(
/* End of the delete loop */
sqlite3VdbeAddOp(v, OP_Goto, 0, addr);
sqlite3VdbeResolveLabel(v, end);
sqlite3VdbeAddOp(v, OP_ListReset, 0, 0);
/* Close the cursors after the loop if there are no row triggers */
if( !triggers_exist ){