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drop table if exists t1, t2; # # Bug #36676: multiupdate using LEFT JOIN updates only # first row or fails with an error: # ERROR 1022 (23000): Can't write; duplicate key in table '' # # # Multiupdate creates MyISAM temporary table without MEMORY table # CREATE TABLE t1 (ID INT); CREATE TABLE t2 (ID INT, s1 TEXT, s2 TEXT, s3 VARCHAR(10), s4 TEXT, s5 VARCHAR(10)); INSERT INTO t1 VALUES (1),(2); INSERT INTO t2 VALUES (1,'test', 'test', 'test', 'test', 'test'), (2,'test', 'test', 'test', 'test', 'test'); SELECT * FROM t1 LEFT JOIN t2 USING(ID); ID s1 s2 s3 s4 s5 1 test test test test test 2 test test test test test UPDATE t1 LEFT JOIN t2 USING(ID) SET s1 = 'changed'; UPDATE t1 JOIN t2 USING(ID) SET s2 = 'changed'; UPDATE t1 LEFT JOIN t2 USING(ID) SET s3 = 'changed'; UPDATE t1 LEFT JOIN t2 USING(ID) SET s4 = 'changed', s5 = 'changed'; SELECT * FROM t1 LEFT JOIN t2 USING(ID); ID s1 s2 s3 s4 s5 1 changed changed changed changed changed 2 changed changed changed changed changed DROP TABLE t1, t2; # # Multiupdate creates temporary MyISAM table from MEMORY table # CREATE TABLE t1 (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY); CREATE TABLE t2 (id INT, s1 CHAR(255)); INSERT INTO t1 VALUES (0), (0), (0), (0), (0), (0), (0), (0); INSERT INTO t1 (SELECT 0 FROM t1); INSERT INTO t1 (SELECT 0 FROM t1); INSERT INTO t1 (SELECT 0 FROM t1); INSERT INTO t2 (SELECT ID, 'a' FROM t1); UPDATE t1 LEFT JOIN t2 USING(id) SET s1 = 'b'; SELECT DISTINCT s1 FROM t1 LEFT JOIN t2 USING(id); s1 b DROP TABLE t1, t2; # End of 5.0 tests