Re: where url = 'x' with url a TEXT field
Thanks.. the problem is I'm running MySQL 4.1.16 I might try FULLTEXT... On 9/27/06, Dan Buettner [EMAIL PROTECTED] wrote: You can create FULLTEXT indexes on text fields - but that may not be the best solution for your situation since you are querying for an exact match. In MySQL 5.0.3 and later, you can create VARCHAR columns of up to 65,535 character lengths: http://dev.mysql.com/doc/refman/5.0/en/char.html I seem to recall you were asking about storing URLs up to the practical limit, 2083 characters. I've never used a varchar column that long before; I'm not sure what the performance implications might be, or how effective a database index on a field that length would be. Still, worth a try. Could be that it will work smashingly. HTH, Dan On 9/27/06, Peter Van Dijck [EMAIL PROTECTED] wrote: Hi, since urls can be longer than 255 chars, I made the url field a TEXT field. The problem is, I can't make an index on it, so doing 'WHERE url='xxx'' becomes a very sloow query. Any ideas for solutions? Am I mistaken in the idea that I can't make an index on a TEXT field? Thanks! Peter -- Find 1s of videoblogs and podcasts at http://mefeedia.com my blog: http://poorbuthappy.com/ease/ my job: http://petervandijck.net -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- Find 1s of videoblogs and podcasts at http://mefeedia.com my blog: http://poorbuthappy.com/ease/ my job: http://petervandijck.net -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: where url = 'x' with url a TEXT field
Peter Van Dijck wrote: Thanks.. the problem is I'm running MySQL 4.1.16 I might try FULLTEXT... U can create normal indexes on text columns if u specify a prefix length. -- Chris Wagner CBTS GE Aircraft Engines [EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: where url = 'x' with url a TEXT field
I think you have to specify a key length when you use an index on a text field... mysql alter table t2 add index i2(t1(3)); That would create an index (called i2) on the first 3 characters of field t1 of table t2. I think that's right? Douglas Sims [EMAIL PROTECTED] On Sep 27, 2006, at 8:53 PM, Peter Van Dijck wrote: Hi, since urls can be longer than 255 chars, I made the url field a TEXT field. The problem is, I can't make an index on it, so doing 'WHERE url='xxx'' becomes a very sloow query. Any ideas for solutions? Am I mistaken in the idea that I can't make an index on a TEXT field? Thanks! Peter -- Find 1s of videoblogs and podcasts at http://mefeedia.com my blog: http://poorbuthappy.com/ease/ my job: http://petervandijck.net -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: where url = 'x' with url a TEXT field
You can create FULLTEXT indexes on text fields - but that may not be the best solution for your situation since you are querying for an exact match. In MySQL 5.0.3 and later, you can create VARCHAR columns of up to 65,535 character lengths: http://dev.mysql.com/doc/refman/5.0/en/char.html I seem to recall you were asking about storing URLs up to the practical limit, 2083 characters. I've never used a varchar column that long before; I'm not sure what the performance implications might be, or how effective a database index on a field that length would be. Still, worth a try. Could be that it will work smashingly. HTH, Dan On 9/27/06, Peter Van Dijck [EMAIL PROTECTED] wrote: Hi, since urls can be longer than 255 chars, I made the url field a TEXT field. The problem is, I can't make an index on it, so doing 'WHERE url='xxx'' becomes a very sloow query. Any ideas for solutions? Am I mistaken in the idea that I can't make an index on a TEXT field? Thanks! Peter -- Find 1s of videoblogs and podcasts at http://mefeedia.com my blog: http://poorbuthappy.com/ease/ my job: http://petervandijck.net -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
