Remove extra prefetch iterator setup for Bitmap Table Scan

1a0da347a7ac98db replaced Bitmap Table Scan's separate private and
shared bitmap iterators with a unified iterator. It accidentally set up
the prefetch iterator twice for non-parallel bitmap table scans. Remove
the extra set up call to tbm_begin_iterate().

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 928c94cab6a9ed9fb426165c73bc938bd28cb06d..e6067500e1132f93437ca38da9d9f9c59aeb4d36 100644 (file)
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -105,15 +105,6 @@ BitmapHeapNext(BitmapHeapScanState *node)
                                elog(ERROR, "unrecognized result from subplan");
 
                        node->tbm = tbm;
-
-#ifdef USE_PREFETCH
-                       if (node->prefetch_maximum > 0)
-                               node->prefetch_iterator =
-                                       tbm_begin_iterate(node->tbm, dsa,
-                                                                         pstate ?
-                                                                         pstate->prefetch_iterator :
-                                                                         InvalidDsaPointer);
-#endif                                                 /* USE_PREFETCH */
                }
                else if (BitmapShouldInitializeSharedState(pstate))
                {