database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-26 01:22:12 +03:00
Code Activity

> > Prevent sorting if result is already sorted

Browse Source 
> >
> > was implemented by Jan Wieck.
> > His work is for ascending order cases.
> >
> > Here is a patch to prevent sorting also in descending
> > order cases.
> > Because I had already changed _bt_first() to position
> > backward correctly before v6.5,this patch would work.
> >
Hiroshi Inoue
Inoue@tpf.co.jp
This commit is contained in:
Bruce Momjian
1999-08-09 06:20:27 +00:00
parent 5efe31214a
commit 158fd5f1c4
9 changed files with 78 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/backend/nodes/copyfuncs.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.89 1999/07/27 03:51:07 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.90 1999/08/09 06:20:23 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -238,6 +238,7 @@ _copyIndexScan(IndexScan *from)
newnode->indxid = listCopy(from->indxid);
Node_Copy(from, newnode, indxqual);
Node_Copy(from, newnode, indxqualorig);
newnode->indxorderdir = from->indxorderdir;
return newnode;
}

5
src/backend/nodes/equalfuncs.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.45 1999/07/29 02:45:36 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.46 1999/08/09 06:20:24 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -437,6 +437,9 @@ _equalIndexScan(IndexScan *a, IndexScan *b)
if (a->scan.scanrelid != b->scan.scanrelid)
return false;
if (a->indxorderdir != b->indxorderdir)
return false;
if (!equali(a->indxid, b->indxid))
return false;
return true;

3
src/backend/nodes/outfuncs.c
View File

@ -5,7 +5,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: outfuncs.c,v 1.91 1999/07/24 23:21:07 tgl Exp $
* $Id: outfuncs.c,v 1.92 1999/08/09 06:20:24 momjian Exp $
*
* NOTES
* Every (plan) node in POSTGRES has an associated "out" routine which
@ -445,6 +445,7 @@ _outIndexScan(StringInfo str, IndexScan *node)
appendStringInfo(str, " :indxqualorig ");
_outNode(str, node->indxqualorig);
appendStringInfo(str, " :indxorderdir %d ", node->indxorderdir);
}
/*

7
src/backend/nodes/readfuncs.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.70 1999/07/24 23:21:08 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.71 1999/08/09 06:20:24 momjian Exp $
*
* NOTES
* Most of the read functions for plan nodes are tested. (In fact, they
@ -532,6 +532,11 @@ _readIndexScan()
token = lsptok(NULL, &length); /* eat :indxqualorig */
local_node->indxqualorig = nodeRead(true); /* now read it */
token = lsptok(NULL, &length); /* eat :indxorderdir */
token = lsptok(NULL, &length); /* get indxorderdir */
local_node->indxorderdir = atoi(token);
return local_node;
}