Small performance improvement in comparetup_heap.

diff --git a/src/backend/utils/sort/tuplesort.c b/src/backend/utils/sort/tuplesort.c
index be80b246a2b99949e0b8bcbdd2919437663bc6e3..7998372d4beebd064267a319d684f6d657284a90 100644 (file)
--- a/src/backend/utils/sort/tuplesort.c
+++ b/src/backend/utils/sort/tuplesort.c
@@ -78,7 +78,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *       $Header: /cvsroot/pgsql/src/backend/utils/sort/tuplesort.c,v 1.6 2000/02/18 06:32:30 tgl Exp $
+ *       $Header: /cvsroot/pgsql/src/backend/utils/sort/tuplesort.c,v 1.7 2000/03/01 17:14:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1632,20 +1632,16 @@ comparetup_heap(Tuplesortstate *state, const void *a, const void *b)
        for (nkey = 0; nkey < state->nKeys; nkey++)
        {
                ScanKey         scanKey = state->scanKeys + nkey;
+               AttrNumber      attno = scanKey->sk_attno;
                Datum           lattr,
                                        rattr;
                bool            isnull1,
                                        isnull2;
                int                     result;
 
-               lattr = heap_getattr(ltup,
-                                                        scanKey->sk_attno,
-                                                        tupDesc,
-                                                        &isnull1);
-               rattr = heap_getattr(rtup,
-                                                        scanKey->sk_attno,
-                                                        tupDesc,
-                                                        &isnull2);
+               lattr = heap_getattr(ltup, attno, tupDesc, &isnull1);
+               rattr = heap_getattr(rtup, attno, tupDesc, &isnull2);
+
                if (isnull1)
                {
                        if (!isnull2)