Since the update STATISTICS are not run automatically, the System Catalog tables would not be updated and would still be retaining the old statistical data.
由于没有自动运行UPDATESTATISTICS，所以systemcatalog表没有更新，仍然保留旧的统计数据。
Since the update STATISTICS are not run automatically, the System Catalog tables would not be updated and would still be retaining the old statistical data.
由于没有自动运行UPDATESTATISTICS，所以systemcatalog表没有更新，仍然保留旧的统计数据。
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