# Copyright Materialize, Inc. and contributors. All rights reserved.
#
# Use of this software is governed by the Business Source License
# included in the LICENSE file at the root of this repository.
#
# As of the Change Date specified in that file, in accordance with
# the Business Source License, use of this software will be governed
# by the Apache License, Version 2.0.

# Make sure that there are no functions with duplicate OIDs
query I
select oid from (select count(*) as cnt, oid from mz_catalog.mz_functions group by oid) where cnt>1
----

# regproc

query T
SELECT 1::regproc
----
1

query T
SELECT 1::int4::regproc
----
1

query T
SELECT 1::oid::regproc
----
1

query T
SELECT 1::oid::regproc::oid
----
1

query T
SELECT '1'::regproc
----
1

query T
SELECT '1'::pg_catalog.regproc
----
1

query T
SELECT '1'::regproc::text
----
1

query T
SELECT 'now'::regproc::text
----
now

# These overflows their stack in debug mode
# query T
# SELECT 'now'::regproc::text::regproc
# ----
# 1299
#
# query T
# SELECT 'now'::regproc::text::regproc::text
# ----
# now
#
# query T
# SELECT 'pg_catalog.now'::regproc::text::regproc::text
# ----
# now

query T
SELECT 'now'::regproc
----
1299

query T
SELECT 'now'::regproc::oid
----
1299

query T
SELECT NULL::regproc::text
----
NULL

query error db error: ERROR: more than one function named "max"
SELECT 'max'::regproc

query T
SELECT min(oid::int)::regproc::text FROM mz_objects WHERE name = 'max';
----
pg_catalog.max

query error db error: ERROR: function "dne" does not exist
SELECT 'dne'::regproc

query T
SELECT 'array_in'::regproc
----
750

query B
SELECT 750 = 'array_in'::regproc
----
true

statement ok
CREATE TABLE text_to_regproc (a text);

statement ok
INSERT INTO text_to_regproc VALUES (NULL), ('array_in');

query I
SELECT a::regproc FROM text_to_regproc ORDER BY a
----
750
NULL

# Regression for 9194
query I
select 'now'::regproc::oid::regproc
----
1299

# Check that we handle functions and types w/ same name
query T
SELECT '1178'::regproc::text;
----
pg_catalog.date

query T
SELECT '1082'::regtype::text;
----
date

query error db error: ERROR: more than one function named "date"
SELECT 'date'::regproc::text;

query T
SELECT 'date'::regtype::text;
----
date

statement ok
CREATE TYPE array_length AS LIST (ELEMENT TYPE = int4);

query T
SELECT 'array_length'::regproc::text;
----
array_length

query T
SELECT 'array_length'::regtype::text;
----
array_length

# Check that we handle functions and classes w/ same name
statement ok
CREATE TABLE quote_ident();

query T
SELECT 'quote_ident'::regclass::text;
----
quote_ident

query T
SELECT 'quote_ident'::regproc::text;
----
quote_ident

# ensure that all existing functions can be cast to their respective names (materialize#9199)
statement OK
select oid, oid::regproc::text from (select oid from mz_catalog.mz_functions)

# Regression for 18020
query B
SELECT returns_set FROM mz_functions WHERE name in ('generate_series', 'generate_subscripts', 'regexp_extract', 'jsonb_array_elements', 'jsonb_array_elements_text', 'jsonb_each', 'jsonb_each_text', 'jsonb_object_keys');
----
true
true
true
true
true
true
true
true
true
true
true
true
true

# ensure that catalog functions can be resolved if the active database is invalid

statement OK
SET database TO ''

query T
SELECT 'array_in'::regproc
----
750