3.4.4 SET TRANSACTION Syntax

SET SESSION TRANSACTION ISOLATION LEVEL level

level:
REPEATABLE READ
| READ COMMITTED
| READ UNCOMMITTED
| SERIALIZABLE

SET @@SESSION.TX_ISOLATION = 'level_str'

level_str: REPEATABLE-READ
| READ-COMMITTED
| READ-UNCOMMITTED
| SERIALIZABLE

注:因为隔离级别不加session关键字语义不同,暂不支持

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