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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Listing 12 shows a handler that will exit the procedure when SQL warnings and the not found conditions are encountered.

清单12展示了一个处理程序，它将在遇到SQL警告和not found条件时退出过程。

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Since a procedure in a high-level language has a single entry and a single exit point, it is common for a CFG to have a unique entry and exit node as well.

因为在高级语言中一个过程有一个单一入口点和一个单一出口点，所以一个CFG通常也有唯一的入口结点和出口结点。

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