检查输出以验证是否成功处理了所有的命令。
Examine the output to verify that all the commands were processed successfully.
通过成功处理程序和错误处理程序函数执行查询。
The query is executed with a success handler and an error handler function.
如果成功处理login，则将调用commit方法。
If the login processing is successful, then the commit method is called.
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