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--
--   http://www.apache.org/licenses/LICENSE-2.0
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-- ConfigMatrix: parquet.enable.dictionary=false,true

statement
CREATE TABLE test_flatten(arr array<array<int>>) USING parquet

statement
INSERT INTO test_flatten VALUES (array(array(1, 2), array(3, 4))), (array(array(), array(1))), (array()), (NULL), (array(array(1, NULL), array(NULL)))

query spark_answer_only
SELECT flatten(arr) FROM test_flatten

-- literal arguments
query spark_answer_only
SELECT flatten(array(array(1, 2), array(3, 4)))
