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'#--------------------FN_DYNVARS_011_01-------------------------#'
SET @global_collation_database = @@global.collation_database;
SET @session_collation_database = @@session.collation_database;
SET @session_collation_server = @@session.collation_server;
SET @@global.collation_database = latin1_danish_ci;
connect con1,localhost,root,,,,;
connection con1;
SELECT @@global.collation_database;
@@global.collation_database
latin1_danish_ci
SELECT @@session.collation_database;
@@session.collation_database
utf8mb4_uca1400_ai_ci
disconnect con1;
'#--------------------FN_DYNVARS_011_02-------------------------#'
connection default;
DROP TABLE IF EXISTS t1,t2;
'--check if setting collation_database update character_set_database--'
SET @@session.collation_database = utf8_spanish_ci;
SELECT @@collation_database, @@character_set_database;
@@collation_database @@character_set_database
utf8mb3_spanish_ci utf8mb3
'--check if collation_database effects database/tables charset/collation'
SET @@session.collation_server = utf8_roman_ci;
SET @@session.collation_database = latin2_croatian_ci;
CREATE DATABASE db1;
USE db1;
SHOW CREATE DATABASE db1;
Database Create Database
db1 CREATE DATABASE `db1` /*!40100 DEFAULT CHARACTER SET utf8mb3 COLLATE utf8mb3_roman_ci */
CREATE TABLE t1(a CHAR(20));
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` char(20) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_roman_ci
'---check if updating collation_database effects new table/column---'
SET @@session.collation_database = latin7_general_cs;
CREATE TABLE t2(a CHAR(10));
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` char(10) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_roman_ci
DROP TABLE t1,t2;
'--check value of collation and character set when current db is dropped'
DROP DATABASE db1;
SELECT @@collation_database,@@collation_server,@@character_set_database,@@character_set_server;
@@collation_database @@collation_server @@character_set_database @@character_set_server
utf8mb3_roman_ci utf8mb3_roman_ci utf8mb3 utf8mb3
USE test;
SELECT @@collation_database,@@collation_server,@@character_set_database,@@character_set_server;
@@collation_database @@collation_server @@character_set_database @@character_set_server
utf8mb4_uca1400_ai_ci utf8mb3_roman_ci utf8mb4 utf8mb3
'fill table with some test data';
CREATE TABLE t1(a CHAR(20))CHARACTER SET=latin1;
INSERT INTO t1 VALUES('Muffler'),('Mller'),('MX Systems');
'---check if collation_database effects results sort order---'
SET @@session.collation_database = latin1_swedish_ci;
SELECT * FROM t1 ORDER BY a;
a
Muffler
MX Systems
Mller
SET @@session.collation_database = latin1_german1_ci;
SELECT * FROM t1 ORDER BY a;
a
Muffler
MX Systems
Mller
'explicit Collate clause should effects results sort order';
SELECT * FROM t1 ORDER BY a COLLATE latin1_swedish_ci;
a
Muffler
MX Systems
Mller
SELECT * FROM t1 ORDER BY a COLLATE latin1_german1_ci;
a
Muffler
Mller
MX Systems
'----check if indexing is effected by collation_database---'
SET @@session.collation_database = latin1_swedish_ci;
ALTER TABLE t1 ADD PRIMARY KEY (a);
REPAIR TABLE t1;
Table Op Msg_type Msg_text
test.t1 repair status OK
SELECT * FROM t1 ORDER BY a;
a
Muffler
MX Systems
Mller
ALTER TABLE t1 DROP PRIMARY KEY;
SET @@session.collation_database = latin1_german1_ci;
ALTER TABLE t1 ADD PRIMARY KEY (a);
REPAIR TABLE t1;
Table Op Msg_type Msg_text
test.t1 repair status OK
SELECT * FROM t1 ORDER BY a;
a
Muffler
MX Systems
Mller
DROP TABLE t1;
SET @@global.collation_database = @global_collation_database;
SET @@session.collation_database = @session_collation_database;
SET @@session.collation_server = @session_collation_server;
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