Fix uninitialized variable from commit a4d75c86b.

The path for *exprs != NIL would misbehave, and likely crash,
since pull_varattnos expects its last argument to be valid
at call.

Found by Coverity --- we have no coverage of this path in
the regression tests.

diff --git a/src/backend/statistics/extended_stats.c b/src/backend/statistics/extended_stats.c
index 4674168ff806ef47e5e42f90d92529e1fc46fe44..4bbd85f401ece3eb829072a0bf4484cb6dd8f3ce 100644 (file)
--- a/src/backend/statistics/extended_stats.c
+++ b/src/backend/statistics/extended_stats.c
@@ -1609,7 +1609,7 @@ statext_is_compatible_clause(PlannerInfo *root, Node *clause, Index relid,
 
    if (pg_class_aclcheck(rte->relid, userid, ACL_SELECT) != ACLCHECK_OK)
    {
-       Bitmapset  *clause_attnums;
+       Bitmapset  *clause_attnums = NULL;
 
        /* Don't have table privilege, must check individual columns */
        if (*exprs != NIL)