--disable_warnings DROP DATABASE IF EXISTS MCOL5755; --enable_warnings CREATE DATABASE MCOL5755; USE MCOL5755; CREATE TABLE t1 (t TEXT,c CHAR(10),b BLOB) ENGINE = columnstore; INSERT INTO t1 VALUES (NULL,NULL,NULL); INSERT INTO t1 VALUES ("","",""); INSERT INTO t1 VALUES ("hello","hello","hello"); INSERT INTO t1 VALUES ("HELLO","HELLO","HELLO"); INSERT INTO t1 VALUES ("HELLO MY","HELLO MY","HELLO MY"); INSERT INTO t1 VALUES ("a","a","a"); INSERT INTO t1 VALUES (1,1,1); --sorted_result SELECT b FROM t1 GROUP BY b; --sorted_result SELECT t FROM t1 GROUP BY t; DROP DATABASE MCOL5755;