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'#--------------------FN_DYNVARS_048_01-------------------------#'
SET @start_value= @@global.innodb_table_locks;
SELECT @start_value;
@start_value
1
SET @@global.innodb_table_locks = OFF;
'connect (con1,localhost,root,,,,)'
connect con1,localhost,root,,,,;
'connection con1'
connection con1;
SELECT @@global.innodb_table_locks;
@@global.innodb_table_locks
0
SELECT @@session.innodb_table_locks;
@@session.innodb_table_locks
0
disconnect con1;
'#--------------------FN_DYNVARS_048_02-------------------------#'
'----check when innodb_table_locks = ON and autocommit = OFF---'
'connect (con2,localhost,root,,,,)'
connect con2,localhost,root,,,,;
'connection default'
connection default;
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a INT) ENGINE=INNODB;
SET @@autocommit = OFF;
SET @@innodb_table_locks = ON;
BEGIN;
INSERT INTO t1 VALUES(1);
SELECT * FROM t1 FOR UPDATE;
a
1
'CONNECTION con2'
connection con2;
SET @@innodb_table_locks = ON;
SET @@autocommit = OFF;
LOCK TABLES t1 WRITE;
'CONNECTION default'
connection default;
COMMIT;
'CONNECTION con2'
connection con2;
UNLOCK tables;
DROP TABLE t1;
disconnect con2;
connection default;
SET @@global.innodb_table_locks= @start_value;
SELECT @@global.innodb_table_locks;
@@global.innodb_table_locks
1
|
