grammar: Fix some bogus parent references.

Author: anse1

expr.cc

@@ -55,7 +55,7 @@ shared_ptr<bool_expr> bool_expr::factory(prod *p)
 
 exists_predicate::exists_predicate(prod *p) : bool_expr(p)
 {
-  subquery = make_shared<query_spec>(p, scope);
+  subquery = make_shared<query_spec>(this, scope);
 }
 
 void exists_predicate::accept(prod_visitor *v)
@@ -71,9 +71,9 @@ void exists_predicate::out(std::ostream &out)
 
 distinct_pred::distinct_pred(prod *p) : bool_binop(p)
 {
-  lhs = make_shared<column_reference>(p);
+  lhs = make_shared<column_reference>(this);
  retry:
-  rhs = make_shared<column_reference>(p);
+  rhs = make_shared<column_reference>(this);
   if (lhs->type != rhs->type)
     { retries++; goto retry; }
 }

grammar.cc

@@ -37,7 +37,7 @@ table_subquery::table_subquery(prod *p, bool lateral)
   : table_ref(p), is_lateral(lateral) {
   ostringstream r;
   r << "subq_" << instances++;
-  query = make_shared<query_spec>(p, scope);
+  query = make_shared<query_spec>(this, scope);
   string alias = r.str();
   relation *aliased_rel = &query->select_list->derived_table;
   refs.push_back(make_shared<aliased_relation>(alias, aliased_rel));
@@ -121,7 +121,7 @@ from_clause::from_clause(prod *p) : prod(p) {
 
   while (d6() > 5) {
     // add a lateral subquery
-    reflist.push_back(make_shared<table_subquery>(p, true));
+    reflist.push_back(make_shared<table_subquery>(this, true));
     for (auto r : reflist.back()->refs)
       scope->refs.push_back(&*r);
   }