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Re: 2 column between optimization
Posted by: Brad Culberson ()
Date: September 02, 2005 02:25PM

+------------+
| version() |
+------------+
| 4.1.13a-nt |
+------------+

CREATE TABLE `geo_feature` (
`latitude` float default NULL,
`longitude` float default NULL,
`feature` varchar(50) default NULL,
KEY `GeoFeatureLocationBoundingBox` (`latitude`,`longitude`),
KEY `GeoFeatureLatitude` (`latitude`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8


| Table | Non_unique | Key_name | Seq_in_index | Column_name
| Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment |
+-------------+------------+-------------------------------------------+--------------+---------------------------------
--+-----------+-------------+----------+--------+------+------------+---------+
| geo_feature | 1 | GeoFeatureLocationBoundingBox | 1 | latitude
| A | 239523 | NULL | NULL | YES | BTREE | |
| geo_feature | 1 | GeoFeatureLocationBoundingBox | 2 | longitude
| A | 2155714 | NULL | NULL | YES | BTREE | |
| geo_feature | 1 | GeoFeatureLatitude | 1 | latitude
| A | 239523 | NULL | NULL | YES | BTREE | |


For this optimization, We need to pull all the data in a certain bounding area by lat/lon thus the following query:

Select * from geo_feature where latitude BETWEEN .06494 and 0.7384 and longitude between -1.234 and -1.1212;

also tried:

Select * from geo_feature where latitude > .06494 and latitude < 0.7384 and longitude > -1.234 and longitude < -1.1212;

Thanks,
Brad

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Subject Views Written By Posted
2 column between optimization 5100 Brad Culberson 09/02/2005 12:39PM
Re: 2 column between optimization 2399 Felix Geerinckx 09/02/2005 02:01PM
Re: 2 column between optimization 2431 Brad Culberson 09/02/2005 02:25PM
Re: 2 column between optimization 2290 Felix Geerinckx 09/02/2005 03:38PM
Re: 2 column between optimization 2220 Brad Culberson 09/06/2005 09:17PM
Re: 2 column between optimization 2262 Jay Pipes 09/05/2005 12:03PM
Re: 2 column between optimization 2222 Brad Culberson 09/06/2005 09:18PM
Re: 2 column between optimization 2213 KimSeong Loh 09/04/2005 07:21PM
Re: 2 column between optimization 2187 Brad Culberson 09/06/2005 09:14PM
Re: 2 column between optimization 2367 Jay Pipes 09/06/2005 09:22PM
Re: 2 column between optimization 2137 Brad Culberson 09/06/2005 11:17PM
Re: 2 column between optimization 2129 KimSeong Loh 09/07/2005 02:54AM
Re: 2 column between optimization 2454 Jay Pipes 09/07/2005 02:48AM
Re: 2 column between optimization 2308 Brad Culberson 09/07/2005 12:25PM
Re: 2 column between optimization 2147 Jay Pipes 09/07/2005 12:54PM


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