Fix 8.3 support

diff --git a/gevel.c b/gevel.c
index 2886c3d..d9d8397 100644 (file)
--- 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