From a26fb4fc95f1ab760b98f5b877c51565a2a2f5e7 Mon Sep 17 00:00:00 2001
From: teodor <teodor>
Date: Tue, 12 May 2009 10:04:13 +0000
Subject: [PATCH] Fix 8.3 support

---
 gevel.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/gevel.c b/gevel.c
index 2886c3d..d9d8397 100644
--- a/gevel.c
+++ b/gevel.c
@@ -710,11 +710,18 @@ Datum
 gin_count_estimate(PG_FUNCTION_ARGS) {
 	text    		*name=PG_GETARG_TEXT_P(0);
 	Relation 		index;
-	TIDBitmap		*bitmap = tbm_create(work_mem * 1024L);
 	IndexScanDesc	scan;
-	int64			count;
+	int64			count = 0;
 	char 			*relname=t2c(name);
 	ScanKeyData		key;
+#if PG_VERSION_NUM >= 80400
+	TIDBitmap		*bitmap = tbm_create(work_mem * 1024L);
+#else
+#define	MAXTIDS		1024
+	ItemPointerData	tids[MAXTIDS];
+	int32			returned_tids;
+	bool			more;
+#endif
 
 	index = gin_index_open(
 		 makeRangeVarFromNameList(stringToQualifiedNameList(relname, "gin_count_estimate")));
@@ -732,15 +739,23 @@ gin_count_estimate(PG_FUNCTION_ARGS) {
 
 	fmgr_info( F_TS_MATCH_VQ , &key.sk_func );
 
+#if PG_VERSION_NUM >= 80400
 	scan = index_beginscan_bitmap(index, SnapshotNow, 1, &key);
 
 	count = index_getbitmap(scan, bitmap);
 	tbm_free(bitmap);
+#else
+	scan = index_beginscan_multi(index, SnapshotNow, 1, &key);
+
+	do {
+		more = index_getmulti(scan, tids, MAXTIDS, &returned_tids);
+		count += returned_tids;
+	} while(more);
+#endif
 
 	index_endscan( scan );
 	gin_index_close(index);
 
-
 	PG_RETURN_INT64(count);
 }
 #else
-- 
2.46.1