第二章 SQL命令参考-RELEASE SAVEPOINT

RELEASE SAVEPOINT
清除前面定的一个保存点
概要
RELEASE[SAVEPOINT]savepoint_name
描述
RELEASE SAVEPOINT销毁先前在当前事务中定义的保存点。

销毁保存点使其不可用作回滚点，但没有其他用户可见的行为。

它不会撤消在保存点建立后执行的命令的影响。 （要这样做，看

滚动保存到SAVEPOINT。）在不再需要时销毁保存点可能会允许系统

在交易结束之前回收一些资源。

RELEASE SAVEPOINT还会销毁在命名的保存点之后建立的所有保存点

成立。
parameter
savepoint_name

The name ofthe savepoint to destroy.
示例
To establish and later destroy asavepoint:

BEGIN; INSERT INTO table1 VALUES (3); SAVEPOINT my_savepoint; INSERT INTO table1 VALUES (4); RELEASE SAVEPOINT my_savepoint; COMMIT;   The above transaction will insert both 3 and 4.

 

兼容性
This command conforms to the SQLstandard. The standard specifies that the key word savepoint is mandatory, butGreenplum Database allows it to be omitted.
相关参考
BEGIN,
SAVEPOINT, ROLLBACK TO SAVEPOINT,
COMMIT