其實是事務隔離的事
show variables
like
'%iso%'
;
+
---------------+-----------------+
| Variable_name | Value |
+
---------------+-----------------+
| tx_isolation |
REPEATABLE
-
READ
|
+
---------------+-----------------+
1 row
in
set
(0.00 sec)
-- 執行如下命令
set
global
TRANSACTION
ISOLATION
LEVEL
READ
COMMITTED
;
Query OK, 0
rows
affected (0.00 sec)
show
global
variables
like
'%iso%'
;
+
---------------+----------------+
| Variable_name | Value |
+
---------------+----------------+
| tx_isolation |
READ
-
COMMITTED
|
+
---------------+----------------+