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Re: Group-wise Maximum performance
Posted by: Jon Richards
Date: May 03, 2005 02:34PM

Well it seemed to speed up a little, but not that much.
I'm using a BIGINT because the value equates to a java 64 bit long. Is there something more approporate I should use? the number is basically ms since 1970.

explain with indexes of time and name:

"id","select_type","table","type","possible_keys","key","key_len","ref","rows","Extra"
1,"PRIMARY","s1","ALL","","",(null),"",7571,"Using where"
2,"DEPENDENT SUBQUERY","s2","ref","PRIMARY,Index_3","Index_3",255,"storm.s1.name",211,"Using index"

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