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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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11
src/update.c
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@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** to handle UPDATE statements.
**
** $Id: update.c,v 1.108 2005/06/12 21:35:53 drh Exp $
** $Id: update.c,v 1.109 2005/07/08 13:08:00 drh Exp $
*/
#include "sqliteInt.h"
@@ -273,7 +273,7 @@ void sqlite3Update(
/* Remember the index of every item to be updated.
*/
sqlite3VdbeAddOp(v, OP_Rowid, iCur, 0);
sqlite3VdbeAddOp(v, OP_ListWrite, 0, 0);
sqlite3VdbeAddOp(v, OP_FifoWrite, 0, 0);
/* End the database scan loop.
*/
@@ -295,8 +295,7 @@ void sqlite3Update(
/* The top of the update loop for when there are triggers.
*/
sqlite3VdbeAddOp(v, OP_ListRewind, 0, 0);
addr = sqlite3VdbeAddOp(v, OP_ListRead, 0, 0);
addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, 0);
if( !isView ){
sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
@@ -389,8 +388,7 @@ void sqlite3Update(
** So make the cursor point at the old record.
*/
if( !triggers_exist ){
sqlite3VdbeAddOp(v, OP_ListRewind, 0, 0);
addr = sqlite3VdbeAddOp(v, OP_ListRead, 0, 0);
addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, 0);
sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
}
sqlite3VdbeAddOp(v, OP_NotExists, iCur, addr);
@@ -468,7 +466,6 @@ void sqlite3Update(
*/
sqlite3VdbeAddOp(v, OP_Goto, 0, addr);
sqlite3VdbeChangeP2(v, addr, sqlite3VdbeCurrentAddr(v));
sqlite3VdbeAddOp(v, OP_ListReset, 0, 0);
/* Close all tables if there were no FOR EACH ROW triggers */
if( !triggers_exist ){