该命令以交互式模式执行Bash shell，表示它本质上是一个您在显式终止它之前可以一直与之交互的shell。

This command executes the Bash shell in interactive mode, meaning that it is essentially a shell that you can interact with until you explicitly terminate it.

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当脚本终止并且确保没有出现关于数据库未显式分离的 DBI 错误消息时， END() 子例程就会执行。

The END() subroutine executes when the script terminates and ensures that a DBI error message about not explicitly disconnecting from the database doesn't occur.

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可以使用点范围(即开始键和终止键相同)显式地搜索一个已知的hash值。

You can explicitly search for a known hash value with point ranges, in other words ranges with identical start and stop keys.

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