Function set_opfuncid

src/backend/nodes/nodeFuncs.c:1741–1746

* set_opfuncid * Set the opfuncid (procedure OID) in an OpExpr node, * if it hasn't been set already. * * Because of struct equivalence, this can also be used for * DistinctExpr and NullIfExpr nodes. */

 * DistinctExpr and NullIfExpr nodes.
 */
void
set_opfuncid(OpExpr *opexpr)
{
	if (opexpr->opfuncid == InvalidOid)
		opexpr->opfuncid = get_opcode(opexpr->opno);
}

/*
 * set_sa_opfuncid