When the INSERT statement fails with the error code specified in the DECLARE exit handler statement, control passes to the handler, and the procedure is exited.

当insert语句失败并且错误代码在DECLARE EXIT handler语句中指定，那么控制将传递到处理程序，而过程将退出。

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The INSERT error transfers control to the exit handler for that SQLSTATE code.

INSERT 错误将控制转移到 SQLSTATE 代码的退出处理程序。

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If it is set to Insert, then new child controls will be generated inside of the targeted control.

如果它被设置为了Insert，那么新的子控件就会在目标控件内生成。

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