SET @transaction_isolation= @@global.transaction_isolation; SET GLOBAL TRANSACTION ISOLATION LEVEL READ UNCOMMITTED; INSERT INTO cache_policies VALUES("cache_policy", "innodb_only", "innodb_only", "innodb_only", "innodb_only"); INSERT INTO config_options VALUES("separator", "|"); INSERT INTO containers VALUES ("desc_t1", "test", "t1", "c1", "c2,c21", "c3", "c4", "c5", "it1"); USE test; DROP TABLE IF EXISTS t1; DROP TABLE IF EXISTS t2; CREATE TABLE t1 (c1 VARCHAR(32), c2 VARCHAR(1024), c21 VARCHAR(1024), c3 INT, c4 BIGINT UNSIGNED, c5 INT) ENGINE = INNODB; CREATE UNIQUE INDEX it1 ON t1 (c1); CREATE TABLE t2 (c1 VARCHAR(32), c11 VARCHAR(32), c2 VARCHAR(255), c21 VARCHAR(255), c3 INT, c4 BIGINT UNSIGNED, c5 INT, primary key(c1), CONSTRAINT ft2 FOREIGN KEY (c11) REFERENCES t1(c1)) ENGINE = INNODB; INSERT INTO t1 VALUES ('Dd', 'Hessen', 'M', 0, 0, 0); INSERT INTO t1 VALUES ('Bb', 'Brandenburg', 'M', 0, 0, 0); INSERT INTO t1 VALUES ('Cc', 'Lausitz', 'S', 0, 0 ,0); INSERT INTO t1 VALUES ('Hh', 'Schleswig-Holstein', 'S', 0, 0, 0); INSERT INTO t2 VALUES ('D','Dd', 'Darmstadt', 'City', 0, 0, 0); INSERT INTO t2 VALUES ('B','Bb', 'Berlin', 'Mitte', 0, 0, 0); INSERT INTO t2 VALUES ('C','Cc', 'Cottbus', 'West', 0, 0 ,0); INSERT INTO t2 VALUES ('H','Hh', 'Hamburg', 'Norderstedt', 0, 0, 0); INSTALL PLUGIN daemon_memcached SONAME 'libmemcached.so'; SELECT c1,c2,c21 FROM t1; c1 c2 c21 Bb Brandenburg M Cc Lausitz S Dd Hessen M Hh Schleswig-Holstein S Here are the memcached results with D,B,H,C: Hessen|M Brandenburg|M Schleswig-Holstein|S Lausitz|S SELECT t1.c1,t1.c2,t1.c21,t2.c2,t2.c21 FROM t1,t2 WHERE t2.c11=t1.c1; c1 c2 c21 c2 c21 Bb Brandenburg M Berlin Mitte Cc Lausitz S Cottbus West Dd Hessen M Darmstadt City Hh Schleswig-Holstein S Hamburg Norderstedt Here are the memcached results after set: Hessen|O SELECT t1.c1,t1.c2,t1.c21,t2.c2,t2.c21 FROM t1,t2 WHERE t2.c11=t1.c1; c1 c2 c21 c2 c21 Bb Brandenburg M Berlin Mitte Cc Lausitz S Cottbus West Dd Hessen M Darmstadt City Hh Schleswig-Holstein S Hamburg Norderstedt Here are the memcached results after add: Mecklenburg|V SELECT t1.c1,t1.c2,t1.c21,t2.c2,t2.c21 FROM t1,t2 WHERE t2.c11=t1.c1; c1 c2 c21 c2 c21 Bb Brandenburg M Berlin Mitte Cc Lausitz S Cottbus West Dd Hessen M Darmstadt City Hh Schleswig-Holstein S Hamburg Norderstedt Here are the memcached results after replace: Mecklenburg-Vorpommern|V SELECT t1.c1,t1.c2,t1.c21,t2.c2,t2.c21 FROM t1,t2 WHERE t2.c11=t1.c1; c1 c2 c21 c2 c21 Bb Brandenburg M Berlin Mitte Cc Lausitz S Cottbus West Dd Hessen M Darmstadt City Hh Schleswig-Holstein S Hamburg Norderstedt Here are the memcached results after delete: SELECT t1.c1,t1.c2,t1.c21,t2.c2,t2.c21 FROM t1,t2 WHERE t2.c11=t1.c1; c1 c2 c21 c2 c21 Bb Brandenburg M Berlin Mitte Cc Lausitz S Cottbus West Dd Hessen M Darmstadt City Hh Schleswig-Holstein S Hamburg Norderstedt INSERT INTO t2 VALUES ('E','Ff', 'Essen','Ost', 0, 0, 0); ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `ft2` FOREIGN KEY (`c11`) REFERENCES `t1` (`c1`)) Here are the memcached results after add Frankfurt|Airport: Mecklenburg-Vorpommern|A INSERT INTO t2 VALUES ('E','Ff', 'Essen','Ost', 0, 0, 0); SELECT t1.c1,t1.c2,t1.c21,t2.c2,t2.c21 FROM t1,t2 WHERE t2.c11=t1.c1; c1 c2 c21 c2 c21 Bb Brandenburg M Berlin Mitte Cc Lausitz S Cottbus West Dd Hessen M Darmstadt City Ff Mecklenburg-Vorpommern A Essen Ost Hh Schleswig-Holstein S Hamburg Norderstedt DROP TABLE test.t2; DROP TABLE test.t1; UNINSTALL PLUGIN daemon_memcached; DROP DATABASE innodb_memcache; SET @@global.transaction_isolation= @transaction_isolation;