Perform updates in search order. Ticket #602. (CVS 1221)

FossilOrigin-Name: cf1cec74ae039cd7cbc8a1032d29f067dedb4210

1 files changed, 14 insertions, 4 deletions

diff --git a/src/vdbe.c b/src/vdbe.c
index 0b21787e0..0e3d8bc33 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -43,7 +43,7 @@
 ** in this file for details.  If in doubt, do not deviate from existing
 ** commenting and indentation practices when changing or adding code.
 **
-** $Id: vdbe.c,v 1.257 2004/02/08 18:07:35 drh Exp $
+** $Id: vdbe.c,v 1.258 2004/02/10 13:41:52 drh Exp $
 */
 #include "sqliteInt.h"
 #include "os.h"
@@ -3784,11 +3784,21 @@ case OP_ListWrite: {
 
 /* Opcode: ListRewind * * *
 **
-** Rewind the temporary buffer back to the beginning.  This is 
-** now a no-op.
+** Rewind the temporary buffer back to the beginning.
 */
 case OP_ListRewind: {
-  /* This is now a no-op */
+  /* What this opcode codes, really, is reverse the order of the
+  ** linked list of Keylist structures so that they are read out
+  ** in the same order that they were read in. */
+  Keylist *pRev, *pTop;
+  pRev = 0;
+  while( p->pList ){
+    pTop = p->pList;
+    p->pList = pTop->pNext;
+    pTop->pNext = pRev;
+    pRev = pTop;
+  }
+  p->pList = pRev;
   break;
 }