Enable backward sequential scan even after reaching EOF.

diff --git a/src/backend/access/heap/heapam.c b/src/backend/access/heap/heapam.c
index cc503c3..d51705f 100644 (file)
--- 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;
                }