Function convert_testexpr

src/backend/optimizer/plan/subselect.c:899–909

* convert_testexpr: convert the testexpr given by the parser into * actually executable form. This entails replacing PARAM_SUBLINK Params * with Params or Vars representing the results of the sub-select. The * nodes to be substituted are passed in as the List result from * generate_subquery_params or generate_subquery_vars. */

 * generate_subquery_params or generate_subquery_vars.
 */
Node *
convert_testexpr(PlannerInfo *root,
				 Node *testexpr,
				 List *subst_nodes)
{
	convert_testexpr_context context;

	context.root = root;
	context.subst_nodes = subst_nodes;
	return convert_testexpr_mutator(testexpr, &context);
}

static Node *
convert_testexpr_mutator(Node *node,