Make [VACUUM] ANALYZE safe on zero-column tables.

diff --git a/src/backend/commands/analyze.c b/src/backend/commands/analyze.c
index 578dc2c62b0838eff1b15eed0b92e2498bc7d073..29f2362ed0bbcc628cb195e55bf29e520cd77025 100644 (file)
--- a/src/backend/commands/analyze.c
+++ b/src/backend/commands/analyze.c
@@ -269,7 +269,8 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt)
        else
        {
                attr_cnt = onerel->rd_att->natts;
-               vacattrstats = (VacAttrStats **) palloc(attr_cnt *
+               /* +1 here is just to avoid palloc(0) with zero-column table */
+               vacattrstats = (VacAttrStats **) palloc((attr_cnt + 1) *
                                                                                                sizeof(VacAttrStats *));
                tcnt = 0;
                for (i = 1; i <= attr_cnt; i++)