set hive.fetch.task.conversion=more;

DESCRIBE FUNCTION locate;
DESCRIBE FUNCTION EXTENDED locate;

EXPLAIN
SELECT locate('abc', 'abcd'),
       locate('ccc', 'abcabc'),
       locate('23', 123),
       locate(23, 123),
       locate('abc', 'abcabc', 2),
       locate('abc', 'abcabc', '2'),
       locate(1, TRUE),
       locate(1, FALSE),
       locate(CAST('2' AS TINYINT), '12345'),
       locate('34', CAST('12345' AS SMALLINT)),
       locate('456', CAST('123456789012' AS BIGINT)),
       locate('.25', CAST(1.25 AS FLOAT)),
       locate('.0', CAST(16.0 AS DOUBLE)),
       locate(null, 'abc'),
       locate('abc', null),
       locate('abc', 'abcd', null),
       locate('abc', 'abcd', 'invalid number')
FROM src tablesample (1 rows);

SELECT locate('abc', 'abcd'),
       locate('ccc', 'abcabc'),
       locate('23', 123),
       locate(23, 123),
       locate('abc', 'abcabc', 2),
       locate('abc', 'abcabc', '2'),
       locate(1, TRUE),
       locate(1, FALSE),
       locate(CAST('2' AS TINYINT), '12345'),
       locate('34', CAST('12345' AS SMALLINT)),
       locate('456', CAST('123456789012' AS BIGINT)),
       locate('.25', CAST(1.25 AS FLOAT)),
       locate('.0', CAST(16.0 AS DOUBLE)),
       locate(null, 'abc'),
       locate('abc', null),
       locate('abc', 'abcd', null),
       locate('abc', 'abcd', 'invalid number')
FROM src tablesample (1 rows);