diff options
Diffstat (limited to 'src/backend/optimizer/util/var.c')
| -rw-r--r-- | src/backend/optimizer/util/var.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/backend/optimizer/util/var.c b/src/backend/optimizer/util/var.c index 9bc90c25313..e59f0e13714 100644 --- a/src/backend/optimizer/util/var.c +++ b/src/backend/optimizer/util/var.c @@ -795,7 +795,7 @@ flatten_join_alias_vars_mutator(Node *node, newvar = (Node *) lfirst(lv); attnum++; /* Ignore dropped columns */ - if (IsA(newvar, Const)) + if (newvar == NULL) continue; newvar = copyObject(newvar); @@ -828,6 +828,7 @@ flatten_join_alias_vars_mutator(Node *node, /* Expand join alias reference */ Assert(var->varattno > 0); newvar = (Node *) list_nth(rte->joinaliasvars, var->varattno - 1); + Assert(newvar != NULL); newvar = copyObject(newvar); /* |