逻辑日志记录保存了sql语句对数据库数据进行的修改。

Logical log records keep changes that SQL statements made to the database data.

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如果您决定删除索引，那么首先要保存它的CREATE index语句，以便在需要时轻松地重新创建它。

If you do decide to drop an index, you should first save its create index statement so that you can easily recreate it if necessary.

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输入如清单2所示的语句并保存它。

Enter the statement as shown in Listing 2 and save it.

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