Remove useless variable.

flatten_join_alias_vars_mutator counted attnums, but didn't
do anything with the count (no doubt it did at one time).

Noted by buildfarm member seawasp.

diff --git a/src/backend/optimizer/util/var.c b/src/backend/optimizer/util/var.c
index 2b44ef3e1769ce7b8df9e903997d4151aefc499c..6d11d187a0c4bf93334c3ce81eb911f7b7149289 100644 (file)
--- a/src/backend/optimizer/util/var.c
+++ b/src/backend/optimizer/util/var.c
@@ -774,16 +774,13 @@ flatten_join_alias_vars_mutator(Node *node,
            RowExpr    *rowexpr;
            List       *fields = NIL;
            List       *colnames = NIL;
-           AttrNumber  attnum;
            ListCell   *lv;
            ListCell   *ln;
 
-           attnum = 0;
            Assert(list_length(rte->joinaliasvars) == list_length(rte->eref->colnames));
            forboth(lv, rte->joinaliasvars, ln, rte->eref->colnames)
            {
                newvar = (Node *) lfirst(lv);
-               attnum++;
                /* Ignore dropped columns */
                if (newvar == NULL)
                    continue;