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************************************************************
* Creating table with char+binary types
************************************************************
CREATE TABLE t3(
c1 char(32),
b1 binary(32)
) ENGINE=NDB;
INSERT INTO t3 VALUES('aaaaaaaa', 'bbbbbbbb');
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
8 32
************************************************************
* Backing up table with char+binary types
************************************************************
************************************************************
* Restoring table with unchanged char+binary types (sanity check):
* char(32) --> char(32)
* binary(32) --> binary(32)
************************************************************
CREATE TABLE t3_myisam ENGINE=MYISAM AS SELECT * FROM t3;
DELETE FROM t3;
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
8 32
SELECT COUNT(*) FROM t3 NATURAL JOIN t3_myisam;
COUNT(*)
1
DROP TABLE t3_myisam;
************************************************************
* Restoring table with promoted char+binary types preserving padding:
* char(32) --> varchar(32)
* binary(32) --> varbinary(32)
************************************************************
ALTER TABLE t3 MODIFY c1 varchar(32), MODIFY b1 varbinary(32);
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
8 32
CREATE TABLE t3_myisam ENGINE=MYISAM AS SELECT * FROM t3;
DELETE FROM t3;
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
32 32
SELECT COUNT(*) FROM t3 NATURAL JOIN t3_myisam;
COUNT(*)
1
DROP TABLE t3_myisam;
************************************************************
* Restoring table with promoted char+binary types preserving padding:
* char(32) --> varchar(64)
* binary(32) --> varbinary(64)
************************************************************
ALTER TABLE t3 MODIFY c1 varchar(64), MODIFY b1 varbinary(64);
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
32 32
CREATE TABLE t3_myisam ENGINE=MYISAM AS SELECT * FROM t3;
DELETE FROM t3;
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
32 32
SELECT COUNT(*) FROM t3 NATURAL JOIN t3_myisam;
COUNT(*)
1
DROP TABLE t3_myisam;
************************************************************
* Restoring table with promoted char+binary types preserving padding:
* char(32) --> varchar(512)
* binary(32) --> varbinary(512)
************************************************************
ALTER TABLE t3 MODIFY c1 varchar(512), MODIFY b1 varbinary(512);
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
32 32
CREATE TABLE t3_myisam ENGINE=MYISAM AS SELECT * FROM t3;
DELETE FROM t3;
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
32 32
SELECT COUNT(*) FROM t3 NATURAL JOIN t3_myisam;
COUNT(*)
1
DROP TABLE t3_myisam;
************************************************************
* Restoring table with demoted char+binary types preserving padding:
* char(32) --> varchar(16)
* binary(32) --> varbinary(16)
************************************************************
ALTER TABLE t3 MODIFY c1 varchar(16), MODIFY b1 varbinary(16);
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
16 16
CREATE TABLE t3_myisam ENGINE=MYISAM AS SELECT * FROM t3;
DELETE FROM t3;
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
16 16
SELECT COUNT(*) FROM t3 NATURAL JOIN t3_myisam;
COUNT(*)
1
DROP TABLE t3_myisam;
************************************************************
* Restoring table with promoted char+binary types discarding padding:
* char(32) --> varchar(32)
* binary(32) --> varbinary(32)
************************************************************
DELETE FROM t3;
ALTER TABLE t3 MODIFY c1 varchar(32), MODIFY b1 varbinary(32);
INSERT INTO t3 VALUES('aaaaaaaa', 'bbbbbbbb');
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
8 8
CREATE TABLE t3_myisam ENGINE=MYISAM AS SELECT * FROM t3;
DELETE FROM t3;
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
8 8
SELECT COUNT(*) FROM t3 NATURAL JOIN t3_myisam;
COUNT(*)
1
DROP TABLE t3_myisam;
************************************************************
* Restoring table with promoted char+binary types discarding padding:
* char(32) --> varchar(64)
* binary(32) --> varbinary(64)
************************************************************
ALTER TABLE t3 MODIFY c1 varchar(64), MODIFY b1 varbinary(64);
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
8 8
CREATE TABLE t3_myisam ENGINE=MYISAM AS SELECT * FROM t3;
DELETE FROM t3;
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
8 8
SELECT COUNT(*) FROM t3 NATURAL JOIN t3_myisam;
COUNT(*)
1
DROP TABLE t3_myisam;
************************************************************
* Restoring table with promoted char+binary types discarding padding:
* char(32) --> varchar(512)
* binary(32) --> varbinary(512)
************************************************************
ALTER TABLE t3 MODIFY c1 varchar(512), MODIFY b1 varbinary(512);
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
8 8
CREATE TABLE t3_myisam ENGINE=MYISAM AS SELECT * FROM t3;
DELETE FROM t3;
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
8 8
SELECT COUNT(*) FROM t3 NATURAL JOIN t3_myisam;
COUNT(*)
1
DROP TABLE t3_myisam;
************************************************************
* Restoring table with demoted char+binary types discarding padding:
* char(32) --> varchar(16)
* binary(32) --> varbinary(16)
************************************************************
ALTER TABLE t3 MODIFY c1 varchar(16), MODIFY b1 varbinary(16);
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
8 8
CREATE TABLE t3_myisam ENGINE=MYISAM AS SELECT * FROM t3;
DELETE FROM t3;
SELECT length(c1), length(b1) FROM t3;
length(c1) length(b1)
8 8
SELECT COUNT(*) FROM t3 NATURAL JOIN t3_myisam;
COUNT(*)
1
DROP TABLE t3_myisam;
************************************************************
* Deleting table with char+binary types
************************************************************
DROP TABLE t3;