sql: don't type-check subqueries in routine argument defaults about cockroach HOT 3 CLOSED

create procedure p(x int default (select 100 from values (null))) language sql as $$ select x; $$;

marcus=# CREATE PROCEDURE p(i INT DEFAULT (SELECT 1 FROM (VALUES (NULL)) AS v)) AS $$
marcus$# SELECT i;
marcus$# $$ LANGUAGE SQL;
ERROR:  0A000: cannot use subquery in DEFAULT expression
LINE 1: CREATE PROCEDURE p(i INT DEFAULT (SELECT 1 FROM (VALUES (NUL...
                                         ^
LOCATION:  transformSubLink, parse_expr.c:1813