Function query_or_expression_tree_walker

src/backend/nodes/nodeFuncs.c:3771–3784

* query_or_expression_tree_walker --- hybrid form * * This routine will invoke query_tree_walker if called on a Query node, * else will invoke the walker directly. This is a useful way of starting * the recursion when the walker's normal change of state is not appropriate * for the outermost Query node. */

 * for the outermost Query node.
 */
bool
query_or_expression_tree_walker(Node *node,
								bool (*walker) (),
								void *context,
								int flags)
{
	if (node && IsA(node, Query))
		return query_tree_walker((Query *) node,
								 walker,
								 context,
								 flags);
	else
		return walker(node, context);
}

/*
 * query_or_expression_tree_mutator --- hybrid form