-- Licensed to the Apache Software Foundation (ASF) under one
-- or more contributor license agreements.  See the NOTICE file
-- distributed with this work for additional information
-- regarding copyright ownership.  The ASF licenses this file
-- to you under the Apache License, Version 2.0 (the
-- "License"); you may not use this file except in compliance
-- with the License.  You may obtain a copy of the License at
--
--   http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing,
-- software distributed under the License is distributed on an
-- "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-- KIND, either express or implied.  See the License for the
-- specific language governing permissions and limitations
-- under the License.

statement
CREATE TABLE test_case_when(i int, s string) USING parquet

statement
INSERT INTO test_case_when VALUES (1, 'a'), (2, 'b'), (3, 'c'), (NULL, 'd'), (1, NULL), (NULL, NULL)

query
SELECT CASE WHEN i = 1 THEN 'one' WHEN i = 2 THEN 'two' ELSE 'other' END FROM test_case_when

query
SELECT CASE i WHEN 1 THEN 'one' WHEN 2 THEN 'two' END FROM test_case_when

query
SELECT CASE WHEN s IS NULL THEN 'null_val' ELSE s END FROM test_case_when

-- literal arguments
query
SELECT CASE WHEN i = 1 THEN s WHEN i = 2 THEN 'fixed' ELSE s END FROM test_case_when
