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stop slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
reset master;
reset slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
start slave;
connection slave
SET @start_max_connections= @@global.max_connections;
SET @start_init_slave= @@global.init_slave;
SET @@global.init_slave = 'SET @@global.max_connections = @@global.max_connections + 1';
DROP TABLE IF EXISTS t1;
CREATE TEMPORARY TABLE t1 AS SELECT @@global.init_slave AS my_column;
DESCRIBE t1;
Field Type Null Key Default Extra
my_column longtext NO NULL
DROP TABLE t1;
SELECT @@global.init_slave = 'SET @@global.max_connections = @@global.max_connections + 1';
@@global.init_slave = 'SET @@global.max_connections = @@global.max_connections + 1'
1
Expect 1
SELECT @@global.max_connections= @start_max_connections;
@@global.max_connections= @start_max_connections
1
Expect 1
STOP SLAVE;
RESET MASTER;
RESET SLAVE;
START SLAVE;
SELECT @@global.max_connections = @start_max_connections + 1;
@@global.max_connections = @start_max_connections + 1
1
Expect 1
SET @@global.init_slave = "SET @a=5";
STOP SLAVE;
RESET MASTER;
RESET SLAVE;
START SLAVE;
SHOW VARIABLES LIKE 'init_slave';
Variable_name Value
init_slave SET @a=5
SELECT @a;
@a
NULL
Expect NULL
SET @@global.max_connections= @start_max_connections;
SET @@global.init_slave= @start_init_slave;
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