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# name: test/sql/function/list/lambdas/list_comprehension.test
# description: Test different examples that can be found when searching for python list comprehension examples
# group: [lambdas]
statement ok
SET lambda_syntax='DISABLE_SINGLE_ARROW'
query I
SELECT list_transform(list_filter([0, 1, 2, 3, 4, 5], lambda x: x % 2 = 0), lambda y: y * y)
----
[0, 4, 16]
query I
SELECT [x * x for x in [0, 1, 2, 3, 4, 5] if x%2=0]
----
[0, 4, 16]
query I
SELECT list_filter(list_filter([2, 4, 3, 1, 20, 10, 3, 30], lambda x: x % 2 == 0), lambda y: y % 5 == 0)
----
[20, 10, 30]
query I
SELECT [x for x in [x for x in [2, 4, 3, 1, 20, 10, 3, 30] if x % 2 == 0] if x % 5 == 0]
----
[20, 10, 30]
query I
SELECT list_filter(['apple', 'banana', 'cherry', 'kiwi', 'mango'], lambda fruit: contains(fruit, 'a'))
----
[apple, banana, mango]
query I
SELECT [fruit for fruit in ['apple', 'banana', 'cherry', 'kiwi', 'mango'] if contains(fruit, 'a')]
----
[apple, banana, mango]
statement ok
CREATE TABLE fruit_tbl AS SELECT ['apple', 'banana', 'cherry', 'kiwi', 'mango'] fruits
query I
SELECT [fruit for fruit in fruits if contains(fruit, 'a')] FROM fruit_tbl
----
[apple, banana, mango]
query I
SELECT list_transform([[1, NULL, 2], [3, NULL]], lambda a: list_filter(a, lambda x: x IS NOT NULL))
----
[[1, 2], [3]]
query I
SELECT [len(x) for x in ['goodbye', 'cruel', 'world']]
----
[7, 5, 5]
statement ok
CREATE TABLE word_tbl AS SELECT ['goodbye', 'cruel', 'world'] words
query I
SELECT [len(x) for x in words] FROM word_tbl
----
[7, 5, 5]
query I
WITH BASE AS (SELECT [4, 5, 6] AS l)
SELECT [x for x, i in l if i != 2] AS filtered FROM base;
----
[4, 6]
query I
SELECT [x + i for x, i in [10, 9, 8, 7, 6]]
----
[11, 11, 11, 11, 11]
query I
WITH BASE AS (SELECT [4, 5, 6] AS l)
SELECT [x + 5 for x in l] AS filtered FROM base;
----
[9, 10, 11]
statement error
SELECT [a for a, b, c in [1, 2, 3]];
----
This lambda function only supports up to two lambda parameters!
statement error
SELECT [a for a[1], b[2] in [1, 2, 3, 4]];
----
Parser Error: syntax error at or near "["
query I
SELECT [i FOR x, i IN [4, 5, 6] IF x > 5];
----
[3]
query I
SELECT [x FOR x IN [4, 5, 6] IF x > 5];
----
[6]
query I
SELECT [i FOR x, i IN [4, 5, 6] IF i % 2 = 0];
----
[2]
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