framework/resources/Functional/joins/nulleqjoin/nullEqJoin_17.drill_5049

SELECT * 
FROM `t_alltype.parquet` t1 
WHERE EXISTS 
            ( 
                SELECT * 
                FROM `t_alltype.parquet` t2 
                WHERE t1.c4 = t2.c4 OR (t1.c4 IS NULL AND t2.c4 IS NULL)
);