From c13d808d60f7d937563fc452a645c98955b79174 Mon Sep 17 00:00:00 2001
From: Tom Lane
Date: Mon, 20 May 2002 23:51:44 +0000
Subject: Restructure indexscan API (index_beginscan, index_getnext) per
 yesterday's proposal to pghackers.  Also remove unnecessary parameters to
 heap_beginscan, heap_rescan.  I modified pg_proc.h to reflect the new numbers
 of parameters for the AM interface routines, but did not force an initdb
 because nothing actually looks at those fields.

---
 src/backend/commands/async.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

(limited to 'src/backend/commands/async.c')

diff --git a/src/backend/commands/async.c b/src/backend/commands/async.c
index 5838883b46..ed503ea97b 100644
--- a/src/backend/commands/async.c
+++ b/src/backend/commands/async.c
@@ -204,8 +204,8 @@ Async_Listen(char *relname, int pid)
 	lRel = heap_openr(ListenerRelationName, AccessExclusiveLock);
 
 	/* Detect whether we are already listening on this relname */
-	scan = heap_beginscan(lRel, 0, SnapshotNow, 0, (ScanKey) NULL);
-	while (HeapTupleIsValid(tuple = heap_getnext(scan, 0)))
+	scan = heap_beginscan(lRel, SnapshotNow, 0, (ScanKey) NULL);
+	while ((tuple = heap_getnext(scan, ForwardScanDirection)) != NULL)
 	{
 		Form_pg_listener listener = (Form_pg_listener) GETSTRUCT(tuple);
 
@@ -305,8 +305,8 @@ Async_Unlisten(char *relname, int pid)
 
 	lRel = heap_openr(ListenerRelationName, AccessExclusiveLock);
 
-	scan = heap_beginscan(lRel, 0, SnapshotNow, 0, (ScanKey) NULL);
-	while (HeapTupleIsValid(tuple = heap_getnext(scan, 0)))
+	scan = heap_beginscan(lRel, SnapshotNow, 0, (ScanKey) NULL);
+	while ((tuple = heap_getnext(scan, ForwardScanDirection)) != NULL)
 	{
 		Form_pg_listener listener = (Form_pg_listener) GETSTRUCT(tuple);
 
@@ -369,9 +369,9 @@ Async_UnlistenAll(void)
 						   Anum_pg_listener_pid,
 						   F_INT4EQ,
 						   Int32GetDatum(MyProcPid));
-	scan = heap_beginscan(lRel, 0, SnapshotNow, 1, key);
+	scan = heap_beginscan(lRel, SnapshotNow, 1, key);
 
-	while (HeapTupleIsValid(lTuple = heap_getnext(scan, 0)))
+	while ((lTuple = heap_getnext(scan, ForwardScanDirection)) != NULL)
 		simple_heap_delete(lRel, &lTuple->t_self);
 
 	heap_endscan(scan);
@@ -472,9 +472,9 @@ AtCommit_Notify(void)
 
 	lRel = heap_openr(ListenerRelationName, AccessExclusiveLock);
 	tdesc = RelationGetDescr(lRel);
-	scan = heap_beginscan(lRel, 0, SnapshotNow, 0, (ScanKey) NULL);
+	scan = heap_beginscan(lRel, SnapshotNow, 0, (ScanKey) NULL);
 
-	while (HeapTupleIsValid(lTuple = heap_getnext(scan, 0)))
+	while ((lTuple = heap_getnext(scan, ForwardScanDirection)) != NULL)
 	{
 		Form_pg_listener listener = (Form_pg_listener) GETSTRUCT(lTuple);
 		char	   *relname = NameStr(listener->relname);
@@ -773,7 +773,7 @@ ProcessIncomingNotify(void)
 						   Anum_pg_listener_pid,
 						   F_INT4EQ,
 						   Int32GetDatum(MyProcPid));
-	scan = heap_beginscan(lRel, 0, SnapshotNow, 1, key);
+	scan = heap_beginscan(lRel, SnapshotNow, 1, key);
 
 	/* Prepare data for rewriting 0 into notification field */
 	nulls[0] = nulls[1] = nulls[2] = ' ';
@@ -782,7 +782,7 @@ ProcessIncomingNotify(void)
 	value[0] = value[1] = value[2] = (Datum) 0;
 	value[Anum_pg_listener_notify - 1] = Int32GetDatum(0);
 
-	while (HeapTupleIsValid(lTuple = heap_getnext(scan, 0)))
+	while ((lTuple = heap_getnext(scan, ForwardScanDirection)) != NULL)
 	{
 		Form_pg_listener listener = (Form_pg_listener) GETSTRUCT(lTuple);
 		char	   *relname = NameStr(listener->relname);
-- 
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