1--echo # 2--echo # MDEV-7149 Constant condition propagation erroneously applied for LIKE 3--echo # 4 5CREATE TABLE t1 AS SELECT REPEAT('a', 10) AS c1 LIMIT 0; 6SHOW CREATE TABLE t1; 7INSERT INTO t1 VALUES ('a'),('a '); 8SELECT * FROM t1 WHERE CONCAT(c1)='a'; 9SELECT * FROM t1 WHERE CONCAT(c1) LIKE 'a '; 10SELECT * FROM t1 WHERE CONCAT(c1)='a' AND CONCAT(c1) LIKE 'a '; 11EXPLAIN EXTENDED SELECT * FROM t1 WHERE CONCAT(c1)='a' AND CONCAT(c1) LIKE 'a '; 12DROP TABLE t1; 13 14CREATE TABLE t1 AS SELECT REPEAT('a', 10) AS c1 LIMIT 0; 15SHOW CREATE TABLE t1; 16INSERT INTO t1 VALUES ('a'),('a '); 17SELECT * FROM t1 WHERE 'a'=CONCAT(c1); 18SELECT * FROM t1 WHERE 'a ' LIKE CONCAT(c1); 19SELECT * FROM t1 WHERE 'a'=CONCAT(c1) AND 'a ' LIKE CONCAT(c1); 20EXPLAIN EXTENDED SELECT * FROM t1 WHERE 'a'=CONCAT(c1) AND 'a ' LIKE CONCAT(c1); 21DROP TABLE t1; 22 23CREATE TABLE t1 AS SELECT REPEAT('a', 10) AS c1 LIMIT 0; 24SHOW CREATE TABLE t1; 25INSERT INTO t1 VALUES ('%'),('% '); 26SELECT * FROM t1 WHERE '% '=CONCAT(c1); 27SELECT * FROM t1 WHERE 'a' LIKE CONCAT(c1); 28SELECT * FROM t1 WHERE '% '=CONCAT(c1) AND 'a' LIKE CONCAT(c1); 29EXPLAIN EXTENDED SELECT * FROM t1 WHERE '% '=CONCAT(c1) AND 'a' LIKE CONCAT(c1); 30DROP TABLE t1; 31 32CREATE TABLE t1 AS SELECT REPEAT('a', 10) AS c1 LIMIT 0; 33SHOW CREATE TABLE t1; 34INSERT INTO t1 VALUES ('%'),('% '); 35SELECT * FROM t1 WHERE '%'=CONCAT(c1); 36SELECT * FROM t1 WHERE 'a' LIKE CONCAT(c1); 37SELECT * FROM t1 WHERE '%'=CONCAT(c1) AND 'a' LIKE CONCAT(c1); 38EXPLAIN EXTENDED SELECT * FROM t1 WHERE '%'=CONCAT(c1) AND 'a' LIKE CONCAT(c1); 39DROP TABLE t1; 40 41--echo # 42--echo # MDEV-8694 Wrong result for SELECT..WHERE a NOT LIKE 'a ' AND a='a' 43--echo # 44 45CREATE TABLE t1 AS SELECT SPACE(10) AS a LIMIT 0; 46SHOW CREATE TABLE t1; 47INSERT INTO t1 VALUES ('a'),('a '); 48SELECT a, LENGTH(a) FROM t1 WHERE a NOT LIKE 'a '; 49SELECT a, LENGTH(a) FROM t1 WHERE a NOT LIKE 'a ' AND a='a'; 50EXPLAIN EXTENDED SELECT a, LENGTH(a) FROM t1 WHERE a NOT LIKE 'a ' AND a='a'; 51DROP TABLE t1; 52 53--echo # 54--echo # End of MDEV-8694 55--echo # 56