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Fixes:

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'select distinct on' causes backend to crash

submitted by: Chris Dunlop    chris@onthe.net.au
This commit is contained in:
Marc G. Fournier
1996-07-19 06:27:59 +00:00
parent 9bffaade96
commit 6562fa851e
1 changed files with 4 additions and 4 deletions
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8
src/backend/executor/nodeUnique.c
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@ -7,7 +7,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/nodeUnique.c,v 1.1.1.1 1996/07/09 06:21:27 scrappy Exp $ * $Header: /cvsroot/pgsql/src/backend/executor/nodeUnique.c,v 1.2 1996/07/19 06:27:59 scrappy Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -124,7 +124,7 @@ ExecUnique(Unique *node)
if (uniqueAttr) { if (uniqueAttr) {
tupDesc = ExecGetResultType(uniquestate); tupDesc = ExecGetResultType(uniquestate);
typoutput = typtoout((Oid)tupDesc->attrs[uniqueAttrNum]->atttypid); typoutput = typtoout((Oid)tupDesc->attrs[uniqueAttrNum-1]->atttypid);
} }
/* ---------------- /* ----------------
@ -174,8 +174,8 @@ ExecUnique(Unique *node)
if (isNull1 == isNull2) { if (isNull1 == isNull2) {
if (isNull1) /* both are null, they are equal */ if (isNull1) /* both are null, they are equal */
continue; continue;
val1 = fmgr(typoutput, attr1, gettypelem(tupDesc->attrs[uniqueAttrNum]->atttypid)); val1 = fmgr(typoutput, attr1, gettypelem(tupDesc->attrs[uniqueAttrNum-1]->atttypid));
val2 = fmgr(typoutput, attr2, gettypelem(tupDesc->attrs[uniqueAttrNum]->atttypid)); val2 = fmgr(typoutput, attr2, gettypelem(tupDesc->attrs[uniqueAttrNum-1]->atttypid));
/* now, val1 and val2 are ascii representations so we can /* now, val1 and val2 are ascii representations so we can
use strcmp for comparison */ use strcmp for comparison */
if (strcmp(val1,val2) == 0) /* they are equal */ if (strcmp(val1,val2) == 0) /* they are equal */