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Archiving old records with another index ?

11:02 pm on Feb 16, 2010 (gmt 0)

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I have something in my mind for better performance, but i don't know if we can implement it with mysql.

For example I've a forum with hundreds of thousands of posts and I want to mark entries that is less than 1 year old as "hot". And when I send a SELECT query I want mysql to search first in "hot" indexes, if not found than search non-hot indexes.

So with that the posts more than 1 year old ones will be searched faster. they are already the most selected ones.

It's like archiving old posts with an another index.

But I don't want to change sql queries, just want to modify the table, database or indexes.

Is it possible?
10:13 pm on Mar 23, 2010 (gmt 0)

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Unfortunately, this wouldn't be possible. However, just having a properly indexed DATE column would allow you to run two queries, first a search of the last year and then only running a search on older records if the first search failed to turn up enough records.
11:21 pm on Mar 23, 2010 (gmt 0)

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