index 2e7c0ad6ba61403eed83f8166711f7ac23556e86..9756fb83c0c855481be992b41b59fa0d8a806836 100644 (file)
@@ -792,6 +792,14 @@ dependency_is_compatible_clause(Node *clause, Index relid, AttrNumber *attnum)
var = (varonleft) ? linitial(expr->args) : lsecond(expr->args);
+ /*
+ * We may ignore any RelabelType node above the operand. (There won't
+ * be more than one, since eval_const_expressions() has been applied
+ * already.)
+ */
+ if (IsA(var, RelabelType))
+ var = (Var *) ((RelabelType *) var)->arg;
+
/* We only support plain Vars for now */
if (!IsA(var, Var))
return false;