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.

diff --git a/src/backend/access/hash/hashsearch.c b/src/backend/access/hash/hashsearch.c
index 459fbc3a167984af787857026091706a3d777256..f1450e1c1ca79f2d33aa2fcb714a8aa65f06dd5a 100644 (file)
--- a/src/backend/access/hash/hashsearch.c
+++ b/src/backend/access/hash/hashsearch.c
@@ -7,7 +7,7 @@
  *
  *
  * 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 {
            ItemPointerSetInvalid(current);
            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)) {