Re: Why does this query filesort?
Filesort only means it need to do a sorting, the sorting could be done in memory instead of file if the sort_buffer is big enough.
I guess sorting 4 rows is not going to take too much time if it is in memory.
The sequential read plus sorting will probably saves you more execution time (disk read) than doing a random read based on the index.
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July 27, 2006 12:05PM
Re: Why does this query filesort?
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August 01, 2006 11:14PM
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