The query optimizer does not recalculate the profile for tables automatically.
查询优化器不会自动重新计算表的配置文件。
The query optimizer will try to reduce the number of messages sent to the data source.
查询优化器将尝试减少发送到数据源的消息的数量。
These views include columns containing statistical information that is useful to the query optimizer.
这些视图包括一些包含对查询优化器有用的统计信息的列。
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