Mark Williams <mark.willi...@jivesoftware.com> wrote: > If I re-write the query like this: > > explain SELECT messageID FROM Message WHERE modificationDate >= > 1302627793988 ORDER BY modificationDate LIMIT 1; > I also get a better plan. Yeah, but it's not necessarily the same value. Do you want the minimum messageID where modificationDate >= 1302627793988 or do you want the messageID of some row (possibly of many) with the minimum modificationDate where modificationDate >= 1302627793988? Since you're asking for a logically different value with that query, it's not surprising it uses a different plan. -Kevin
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