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",
"c11", "c2,c21", "c3", "c4", "c5", "it1");
CREATE USER mysqltest1@localhost;
connect  mysqltest1,localhost,mysqltest1,,;
connection mysqltest1;
USE test;
DROP TABLE IF EXISTS t1;
CREATE TABLE t1        (c1  VARCHAR(32),
c11 VARCHAR(32),
c2  VARCHAR(1024),
c21 VARCHAR(1024),
c3 INT, c4 BIGINT UNSIGNED, c5 INT, primary key(c1))
ENGINE = INNODB;
DROP TABLE IF EXISTS t2;
CREATE TABLE t2        (c1 VARCHAR(32),
c2 VARCHAR(255),
c21 VARCHAR(255),
c3 INT, c4 BIGINT UNSIGNED, c5 INT, primary key(c1))
ENGINE = INNODB;
INSERT INTO t1 VALUES ('D','Dd', 'Darmstadt', 'City', 0, 0, 0);
INSERT INTO t1 VALUES ('B','Bb', 'Berlin', 'Mitte', 0, 0, 0);
INSERT INTO t1 VALUES ('C','Cc', 'Cottbus', 'West', 0, 0 ,0);
INSERT INTO t1 VALUES ('H','Hh', 'Hamburg', 'Norderstedt', 0, 0, 0);
INSERT INTO t2 VALUES ('Dd', 'Darmstadt', 'City', 0, 0, 0);
INSERT INTO t2 VALUES ('Bb', 'Berlin', 'Mitte', 0, 0, 0);
INSERT INTO t2 VALUES ('Cc', 'Cottbus', 'West', 0, 0 ,0);
INSERT INTO t2 VALUES ('Hh', 'Hamburg', 'Norderstedt', 0, 0, 0);
CREATE UNIQUE INDEX it1 ON t1(c11);
connection default;
INSTALL PLUGIN daemon_memcached SONAME 'libmemcached.so';
connection mysqltest1;
USE test;
SELECT c1,c11,c2,c21 FROM t1;
c1	c11	c2	c21
B	Bb	Berlin	Mitte
C	Cc	Cottbus	West
D	Dd	Darmstadt	City
H	Hh	Hamburg	Norderstedt
Here are the memcached results with D,B,H,C:
Darmstadt|City
Berlin|Mitte
Hamburg|Norderstedt
Cottbus|West
SELECT c1,c11,c2,c21 FROM t1;
c1	c11	c2	c21
B	Bb	Berlin	Mitte
C	Cc	Cottbus	West
D	Dd	Darmstadt	City
H	Hh	Hamburg	Norderstedt
Here are the memcached results after set:
SELECT c1,c11,c2,c21 FROM t1;
c1	c11	c2	c21
B	Bb	Berlin	Mitte
C	Cc	Cottbus	West
D	Dd	Darmstadt	City
H	Hh	Hamburg	Norderstedt
Here are the memcached results after add:
SELECT c1,c11,c2,c21 FROM t1;
c1	c11	c2	c21
B	Bb	Berlin	Mitte
C	Cc	Cottbus	West
D	Dd	Darmstadt	City
H	Hh	Hamburg	Norderstedt
Here are the memcached results after replace:
SELECT c1,c11,c2,c21 FROM t1;
c1	c11	c2	c21
B	Bb	Berlin	Mitte
C	Cc	Cottbus	West
D	Dd	Darmstadt	City
H	Hh	Hamburg	Norderstedt
Here are the memcached results after delete:
SELECT c1,c11,c2,c21 FROM t1;
c1	c11	c2	c21
B	Bb	Berlin	Mitte
C	Cc	Cottbus	West
D	Dd	Darmstadt	City
H	Hh	Hamburg	Norderstedt
Here are the memcached results after add Frankfurt|Airport:
SELECT c1,c11,c2,c21 FROM t1;
c1	c11	c2	c21
B	Bb	Berlin	Mitte
C	Cc	Cottbus	West
D	Dd	Darmstadt	City
H	Hh	Hamburg	Norderstedt
Here are the memcached results after replace Frankfurt a.M|Sachsenhausen.:
SELECT c1,c11,c2,c21 FROM t1;
c1	c11	c2	c21
B	Bb	Berlin	Mitte
C	Cc	Cottbus	West
D	Dd	Darmstadt	City
H	Hh	Hamburg	Norderstedt
connection default;
UNINSTALL PLUGIN daemon_memcached;
ALTER TABLE test.t1 DROP PRIMARY KEY;
INSTALL PLUGIN daemon_memcached SONAME 'libmemcached.so';
connection mysqltest1;
Here are the memcached results after set:
SELECT c1,c11,c2,c21 FROM t1;
c1	c11	c2	c21
B	Bb	Berlin	Mitte
C	Cc	Cottbus	West
D	Dd	Darmstadt	City
H	Hh	Hamburg	Norderstedt
connection default;
UNINSTALL PLUGIN daemon_memcached;
ALTER TABLE test.t1 ADD CONSTRAINT PRIMARY KEY (c11);
INSTALL PLUGIN daemon_memcached SONAME 'libmemcached.so';
SHOW CREATE TABLE test.t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `c1` varchar(32) NOT NULL,
  `c11` varchar(32) NOT NULL,
  `c2` varchar(1024) DEFAULT NULL,
  `c21` varchar(1024) DEFAULT NULL,
  `c3` int(11) DEFAULT NULL,
  `c4` bigint(20) unsigned DEFAULT NULL,
  `c5` int(11) DEFAULT NULL,
  PRIMARY KEY (`c11`),
  UNIQUE KEY `it1` (`c11`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
connection mysqltest1;
Here are the memcached results after set:
Hamburg|Norderstedt
SELECT c1,c11,c2,c21 FROM t1;
c1	c11	c2	c21
B	Bb	Berlin	Mitte
C	Cc	Cottbus	West
D	Dd	Darmstadt	City
H	Hh	Hamburg	Norderstedt
connection default;
UNINSTALL PLUGIN daemon_memcached;
ALTER TABLE test.t1 DROP COLUMN c1;
INSTALL PLUGIN daemon_memcached SONAME 'libmemcached.so';
connection mysqltest1;
Here are the memcached results after add:
Essen|Ost
Frankfurt|Sachsenhause
Hamburg|Norderstedt
SELECT c11,c2,c21 FROM t1;
c11	c2	c21
Bb	Berlin	Mitte
Cc	Cottbus	West
Dd	Darmstadt	City
Ee	Essen	Ost
Ff	Frankfurt	Sachsenhause
Hh	Hamburg	Norderstedt
DROP TABLE t1;
DROP TABLE t2;
connection default;
disconnect mysqltest1;
UNINSTALL PLUGIN daemon_memcached;
DROP DATABASE innodb_memcache;
DROP USER mysqltest1@localhost;
SET @@global.transaction_isolation= @transaction_isolation;