http://www.mysqlperformanceblog.com/2006/11/23/covering-index-and-prefix-indexes/ Everything about MySQL Performance Sat, 21 Nov 2009 05:23:57 -0800 http://wordpress.org/?v=2.8.4 hourly 1 http://www.mysqlperformanceblog.com/2006/11/23/covering-index-and-prefix-indexes/comment-page-1/#comment-339631 The MySQL Query Performance Improvement Process | Pablowe Sun, 03 Aug 2008 22:28:28 +0000 http://www.mysqlperformanceblog.com/2006/11/23/covering-index-and-prefix-indexes/#comment-339631 [...] can bog down the network if the unneeded columns are large, and eliminate the possibility of using covering indexes that could eliminate the need to read from disk when retrieving the result set. Additionally, a [...] [...] can bog down the network if the unneeded columns are large, and eliminate the possibility of using covering indexes that could eliminate the need to read from disk when retrieving the result set. Additionally, a [...]

]]> http://www.mysqlperformanceblog.com/2006/11/23/covering-index-and-prefix-indexes/comment-page-1/#comment-14586 peter Fri, 24 Nov 2006 08:42:19 +0000 http://www.mysqlperformanceblog.com/2006/11/23/covering-index-and-prefix-indexes/#comment-14586 Oh yes. Sorry that is what I meant. Fixed now Oh yes. Sorry that is what I meant. Fixed now

]]> http://www.mysqlperformanceblog.com/2006/11/23/covering-index-and-prefix-indexes/comment-page-1/#comment-14579 Maarten Fri, 24 Nov 2006 08:15:59 +0000 http://www.mysqlperformanceblog.com/2006/11/23/covering-index-and-prefix-indexes/#comment-14579 The query of you're last example reeds EXPLAIN SELECT j FROM t WHERE i=5 AND k LIKE "a%", but don't you mean EXPLAIN SELECT k FROM t WHERE i=5 AND j LIKE "a%" ? The query of you’re last example reeds EXPLAIN SELECT j FROM t WHERE i=5 AND k LIKE “a%”, but don’t you mean EXPLAIN SELECT k FROM t WHERE i=5 AND j LIKE “a%” ?

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