DROP FUNCTION regression

[maxhawkins]

After enabling the experimental parser, this query compiles but it shouldn't:

CREATE FUNCTION f(x INT) RETURNS INT AS 'SELECT x' LANGUAGE sql;

DROP FUNCTION f;

-- name: F :one
SELECT f(1);

Tracking on issue #537

[maxhawkins]

Here's another one. This query compiles on older versions of sqlc but doesn't compile on HEAD:

CREATE FUNCTION f(x TIMESTAMPTZ) RETURNS void AS '' LANGUAGE sql;

DROP FUNCTION f(timestamp with time zone);

It doesn't recognize f(timestamp with time zone) is the same as f(timestamptz)

It seems the issue is one gets saved in the catalog as timestamptz and the other gets saved as pg_catalog.timestamptz.

Tracking on issue #538

[maxhawkins]

One more. This query returns a TABLE. It throws the error query.sql:1:1: relation "f" does not exist

CREATE FUNCTION f(x TIMESTAMPTZ) RETURNS TABLE (y INT) AS 'SELECT 1' LANGUAGE sql;

DROP FUNCTION f(TIMESTAMPTZ);

Tracking on issue #539

[maxhawkins]

I was able to track down each of these issues to different bugs, so I created separate issues and am closing this one.