Comments on: MySQL – Should you put an index on a Boolean field to help query performance? http://www.prodromus.com/2010/06/14/mysql-should-you-put-an-index-on-a-boolean-field-to-help-query-performance A forerunner to the future... Fri, 16 Dec 2011 21:39:34 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Prodromus http://www.prodromus.com/2010/06/14/mysql-should-you-put-an-index-on-a-boolean-field-to-help-query-performance/comment-page-1#comment-321 Prodromus Tue, 11 Jan 2011 19:35:49 +0000 http://www.prodromus.com/?p=288#comment-321 Donald, I am sorry that you feel that way. Without a specific example, it is hard to provide a more detailed answers. My main point is that indexing a single boolean field is almost never useful. However, if you have multiple boolean fields, and your search will use a combination, then a covered index can significantly improve query performance. If you have a specific issue you are trying to resolve, send me an email and I will try to respond to you directly. Donald, I am sorry that you feel that way. Without a specific example, it is hard to provide a more detailed answers. My main point is that indexing a single boolean field is almost never useful. However, if you have multiple boolean fields, and your search will use a combination, then a covered index can significantly improve query performance.

If you have a specific issue you are trying to resolve, send me an email and I will try to respond to you directly.

]]> By: Donald Piret http://www.prodromus.com/2010/06/14/mysql-should-you-put-an-index-on-a-boolean-field-to-help-query-performance/comment-page-1#comment-296 Donald Piret Sat, 01 Jan 2011 14:29:43 +0000 http://www.prodromus.com/?p=288#comment-296 While this post is interesting, the fact that you're staying on the surface of things and not actually giving any real information slightly bothers me. It's great to tell us that we should understand how combined indexes can and cannot be used and tell us that the column of orders matter, but not giving any explanation on this or links to documentation where we can find this information makes this article fairly useless While this post is interesting, the fact that you’re staying on the surface of things and not actually giving any real information slightly bothers me.
It’s great to tell us that we should understand how combined indexes can and cannot be used and tell us that the column of orders matter, but not giving any explanation on this or links to documentation where we can find this information makes this article fairly useless

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