1# Test case for MDEV-6838. 2# Due to incorrect key_length computation, this usecase failed with the error 3# Using too big key for internal temp table. 4 5CREATE TABLE t1 (i INT, state VARCHAR(997)) ENGINE=MyISAM; 6INSERT INTO t1 VALUES (2,'Louisiana'),(9,'Maine'); 7 8CREATE TABLE t2 (state VARCHAR(997), j INT) ENGINE=MyISAM; 9INSERT INTO t2 VALUES ('Louisiana',9),('Alaska',5); 10INSERT INTO t2 SELECT t2.* FROM t2 JOIN t2 AS t3 JOIN t2 AS t4 JOIN t2 AS t5 JOIN t2 AS t6; 11 12SET @@max_heap_table_size= 16384; 13set @@optimizer_switch='derived_merge=OFF'; 14set @@optimizer_switch='extended_keys=ON'; 15 16SELECT * FROM t1 AS t1_1 LEFT JOIN ( t1 AS t1_2 INNER JOIN (SELECT * FROM t2) v2 ON t1_2.i = j ) ON t1_1.state = v2.state LIMIT 1; 17 18DROP TABLE t1, t2; 19