MySQL Forums
Forum List  »  Optimizer & Parser

Re: 2 column between optimization
Posted by: Jay Pipes
Date: September 06, 2005 09:22PM

Well, it's doing a full table scan of 2M rows... The reason it is doing this is because more than ~35% of the values in the GeoFeatureLocationBoundingBox index fall between 1 and 2. In order to get the index to be used, you will need to supply more stringent criteria.

BTW, KimSeong Loh's comments made absolute sense when he wrote them. From your query in the first post, it looked like you were issuing an impossible query against an INT field. Since you did not supply the table schema, we wouldn't know if the field values *could* fall between 1 and 2...

Jay Pipes
Community Relations Manager, North America, MySQL Inc.

Got Cluster? http://www.mysql.com/cluster
Personal: http://jpipes.com

Options: ReplyQuote


Subject
Views
Written By
Posted
6276
September 02, 2005 12:39PM
2930
September 02, 2005 02:01PM
3188
September 02, 2005 02:25PM
2910
September 02, 2005 03:38PM
2770
September 06, 2005 09:17PM
2793
September 05, 2005 12:03PM
2825
September 06, 2005 09:18PM
2761
September 04, 2005 07:21PM
2770
September 06, 2005 09:14PM
Re: 2 column between optimization
2969
September 06, 2005 09:22PM
2706
September 06, 2005 11:17PM
2708
September 07, 2005 02:54AM
3084
September 07, 2005 02:48AM
2863
September 07, 2005 12:25PM
2664
September 07, 2005 12:54PM


Sorry, you can't reply to this topic. It has been closed.

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.