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Fix old bug in _hash_first() for scan without keys: 

if 1st bucket chain is empty then need to continue scan in the rest buckets.
This commit is contained in:
Vadim B. Mikheev 1997-04-30 06:31:16 +00:00
parent 3055eeff93
commit fe91ceb62b
1 changed files with 8 additions and 2 deletions
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10
src/backend/access/hash/hashsearch.c
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@ -7,7 +7,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/hash/hashsearch.c,v 1.8 1996/11/21 06:06:52 vadim Exp $ * $Header: /cvsroot/pgsql/src/backend/access/hash/hashsearch.c,v 1.9 1997/04/30 06:31:16 vadim Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -221,7 +221,13 @@ _hash_first(IndexScanDesc scan, ScanDirection dir)
} else { } else {
ItemPointerSetInvalid(current); ItemPointerSetInvalid(current);
so->hashso_curbuf = InvalidBuffer; so->hashso_curbuf = InvalidBuffer;
return ((RetrieveIndexResult) NULL); /*
* If there is no scankeys, all tuples will satisfy
* the scan - so we continue in _hash_step to get
* tuples from all buckets. - vadim 04/29/97
*/
if ( scan->numberOfKeys >= 1 )
return ((RetrieveIndexResult) NULL);
} }
} }
if (ScanDirectionIsBackward(dir)) { if (ScanDirectionIsBackward(dir)) {