'#--------------------FN_DYNVARS_009_01-------------------------#'
SET @global_collation_server = @@global.collation_server;
SET @session_collation_server = @@session.collation_server;
SET @global_character_set_server = @@global.character_set_server;
SET @session_character_set_server = @@session.character_set_server;
SET NAMES utf8mb4;
SET @@global.character_set_server = utf8;
connect  con1,localhost,root,,,,;
connection con1;
SELECT @@global.character_set_server;
@@global.character_set_server
utf8mb3
SELECT @@session.character_set_server;
@@session.character_set_server
utf8mb3
disconnect con1;
'#--------------------FN_DYNVARS_009_02-------------------------#'
connection default;
'--global character_set_server should not effects current connection--'
select @@character_set_database,@@character_set_connection;
@@character_set_database	@@character_set_connection
utf8mb4	utf8mb4
select @@character_set_database=@@character_set_connection;
@@character_set_database=@@character_set_connection
1
SET @@global.character_set_server = utf8;
CREATE DATABASE db1;
USE db1;
SHOW CREATE DATABASE db1;
Database	Create Database
db1	CREATE DATABASE `db1` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_uca1400_ai_ci */
DROP DATABASE db1;
select @@character_set_database;
@@character_set_database
utf8mb4
'---session character_set_server should effects current connection---'
SET @@session.character_set_server = utf8;
CREATE DATABASE db1;
USE db1;
SHOW CREATE DATABASE db1;
Database	Create Database
db1	CREATE DATABASE `db1` /*!40100 DEFAULT CHARACTER SET utf8mb3 COLLATE utf8mb3_general_ci */
DROP DATABASE db1;
select @@character_set_database;
@@character_set_database
utf8mb3
'----test with new connection----'
connect  con1,localhost,root,,,,;
connection con1;
SELECT @@session.character_set_server;
@@session.character_set_server
utf8mb3
'----------character set not specified---------'
CREATE DATABASE db1;
USE db1;
SHOW CREATE DATABASE db1;
Database	Create Database
db1	CREATE DATABASE `db1` /*!40100 DEFAULT CHARACTER SET utf8mb3 COLLATE utf8mb3_general_ci */
DROP DATABASE db1;
SELECT @@character_set_database;
@@character_set_database
utf8mb3
'----------ascii character set specified----------'
CREATE DATABASE db1 character set ascii;
USE db1;
SHOW CREATE DATABASE db1;
Database	Create Database
db1	CREATE DATABASE `db1` /*!40100 DEFAULT CHARACTER SET ascii COLLATE ascii_general_ci */
DROP DATABASE db1;
select @@character_set_database;
@@character_set_database
utf8mb3
disconnect con1;
connection default;
SET @@global.collation_server = @global_collation_server;
SET @@session.collation_server = @session_collation_server;