From 3dec14197bba4013e8688dfeea452388a9846587 Mon Sep 17 00:00:00 2001
From: Hiroshi Inoue <inoue@tpf.co.jp>
Date: Wed, 9 Feb 2000 03:49:47 +0000
Subject: [PATCH] Enable backward sequential scan even after reaching EOF.
---
src/backend/access/heap/heapam.c | 22 +---------------------
1 file changed, 1 insertion(+), 21 deletions(-)
diff --git a/src/backend/access/heap/heapam.c b/src/backend/access/heap/heapam.c
index cc503c32511..d51705fa472 100644
--- a/src/backend/access/heap/heapam.c
+++ b/src/backend/access/heap/heapam.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.65 2000/01/26 05:55:56 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.66 2000/02/09 03:49:47 inoue Exp $
*
*
* INTERFACE ROUTINES
@@ -848,11 +848,6 @@ heap_getnext(HeapScanDesc scandesc, int backw)
if (scan->rs_ptup.t_data == scan->rs_ctup.t_data &&
BufferIsInvalid(scan->rs_pbuf))
{
- if (BufferIsValid(scan->rs_nbuf))
- ReleaseBuffer(scan->rs_nbuf);
- scan->rs_ntup.t_datamcxt = NULL;
- scan->rs_ntup.t_data = NULL;
- scan->rs_nbuf = UnknownBuffer;
return NULL;
}
@@ -910,11 +905,6 @@ heap_getnext(HeapScanDesc scandesc, int backw)
scan->rs_ptup.t_datamcxt = NULL;
scan->rs_ptup.t_data = NULL;
scan->rs_pbuf = InvalidBuffer;
- if (BufferIsValid(scan->rs_nbuf))
- ReleaseBuffer(scan->rs_nbuf);
- scan->rs_ntup.t_datamcxt = NULL;
- scan->rs_ntup.t_data = NULL;
- scan->rs_nbuf = InvalidBuffer;
return NULL;
}
@@ -934,11 +924,6 @@ heap_getnext(HeapScanDesc scandesc, int backw)
if (scan->rs_ctup.t_data == scan->rs_ntup.t_data &&
BufferIsInvalid(scan->rs_nbuf))
{
- if (BufferIsValid(scan->rs_pbuf))
- ReleaseBuffer(scan->rs_pbuf);
- scan->rs_ptup.t_datamcxt = NULL;
- scan->rs_ptup.t_data = NULL;
- scan->rs_pbuf = UnknownBuffer;
HEAPDEBUG_3; /* heap_getnext returns NULL at end */
return NULL;
}
@@ -998,11 +983,6 @@ heap_getnext(HeapScanDesc scandesc, int backw)
scan->rs_ntup.t_datamcxt = NULL;
scan->rs_ntup.t_data = NULL;
scan->rs_nbuf = InvalidBuffer;
- if (BufferIsValid(scan->rs_pbuf))
- ReleaseBuffer(scan->rs_pbuf);
- scan->rs_ptup.t_datamcxt = NULL;
- scan->rs_ptup.t_data = NULL;
- scan->rs_pbuf = InvalidBuffer;
HEAPDEBUG_6; /* heap_getnext returning EOS */
return NULL;
}
--
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