# 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.

# Selecting from scalar functions in FROM clauses

query I
SELECT length FROM length('str');
----
3

query I
SELECT * FROM length('str');
----
3

query T
SELECT * FROM repeat('x', 2);
----
xx

query T
SELECT repeat FROM repeat('x', 2);
----
xx

query T
SELECT * FROM concat('a','b','c');
----
abc

query T
SELECT concat FROM concat('a','b','c');
----
abc

# Passes through decorrelation
query I
SELECT lat_len FROM length('abc'), LATERAL (SELECT length AS lat_len) lat;
----
3

# Aliases

query I colnames
SELECT * FROM length('str');
----
length
3

query I colnames
SELECT * FROM length('str') AS x;
----
x
3

query I colnames
SELECT * FROM length('str') AS x(a);
----
a
3

# Ordinality
query II colnames
SELECT * FROM length('str') WITH ORDINALITY;
----
length ordinality
3
1


# Aliases + ordinality
query II colnames
SELECT * FROM length('str') AS x WITH ORDINALITY;
----
x ordinality
3
1

query II colnames
SELECT * FROM length('str') AS x(a) WITH ORDINALITY;
----
a ordinality
3
1

# Nested recursion.
query I
SELECT length FROM length('str' || (select length FROM length('str')));
----
4

# Cross-joined
query T
SELECT concat_ws(' ', l, a, b) FROM length('str') AS l, (values ('a', 'b'), ('c', 'd')) v(a,b);
----
3 a b
3 c d

# Test functions that exist as catalog-only
query I
SELECT mod FROM mod(3,4);
----
3

query I
SELECT * FROM mod(3,4);
----
3

# Nested recursion.
query I
SELECT mod FROM mod((SELECT mod FROM mod(3,4)),4);
----
3

# Passes through decorrelation
query I
SELECT lat_mod FROM mod(3,4), LATERAL (SELECT mod AS lat_mod) lat;
----
3

# Aliases
query I colnames
SELECT x FROM mod(3,4) AS x;
----
x
3

query I colnames
SELECT a FROM mod(3,4) AS x(a);
----
a
3

# Ordinality
query II colnames
SELECT * FROM mod(3,4) WITH ORDINALITY;
----
mod ordinality
3
1


# Aliases + ordinality
query II colnames
SELECT * FROM mod(3,4) AS x WITH ORDINALITY;
----
x ordinality
3
1

query II colnames
SELECT * FROM mod(3,4) AS x(a) WITH ORDINALITY;
----
a ordinality
3
1

# Aggregates
query error db error: ERROR: aggregate functions are not supported in functions in FROM
SELECT * FROM sum(4)

query error db error: ERROR: aggregate functions are not supported in functions in FROM
SELECT * FROM (VALUES (1), (3)) AS t(a), LATERAL(SELECT * FROM sum(a));

# Aggregates that exist as catalog only
query error db error: ERROR: aggregate functions are not supported in functions in FROM
SELECT * FROM avg(4)

query error db error: ERROR: aggregate functions are not supported in functions in FROM
SELECT * FROM (VALUES (1), (3)) AS t(a), LATERAL(SELECT * FROM avg(a));