第二，代码调试变得更容易，因为我们可以很容易地检查表达式返回的值。
Second, it makes it easier to debug the code, because we can easily inspect the values that the expressions return.
退出调试器的最佳选项始终是中止命令并返回到正常的REPL窗口。
The best option to exit the debugger is always to abort the command and return to the regular REPL window.
除了用于定义过程属性外，还允许定义调试模式和要返回的结果集数量。
The procedure view, in addition to defining the procedure attributes, allows you to define the debug mode and the number of result sets to be returned.
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