Re: Partitioning on a Substring of Varchar Column in Mysql

2012-09-22 Thread Adarsh Sharma
olve this issue. Thanks for your link also , it is very helpfull. Thanks > See tips in > http://mysql.rjweb.org/doc.php/ricksrots > > > > -Original Message- > > From: Adarsh Sharma [mailto:eddy.ada...@gmail.com] > > Sent: Friday, September 21, 2012 5:09 AM > > To: my

RE: Partitioning on a Substring of Varchar Column in Mysql

2012-09-21 Thread Rick James
PARTITION, yet they have not determined that there will be any benefit. See tips in http://mysql.rjweb.org/doc.php/ricksrots > -Original Message- > From: Adarsh Sharma [mailto:eddy.ada...@gmail.com] > Sent: Friday, September 21, 2012 5:09 AM > To: mysql@lists.mysql.com > Sub

Re: Partitioning on a Substring of Varchar Column in Mysql

2012-09-21 Thread Adarsh Sharma
Just update the string needed function substring(id,9,6). On Fri, Sep 21, 2012 at 5:18 PM, Adarsh Sharma wrote: > Hi all, > > I created a partition on a timstamp column ( dt_dtamp ) in mysql-5.1.58 > testing table.But as all of us know that partitioned column need to be > primary key. > I have al

RE: Partitioning

2010-02-23 Thread Jerry Schwartz
From: vegiv...@gmail.com [mailto:vegiv...@gmail.com] On Behalf Of Johan De Meersman Sent: Tuesday, February 23, 2010 5:52 AM To: Jerry Schwartz Cc: MY SQL Mailing list Subject: Re: Partitioning that's very much gonna depend on what your selects look like. For example, a low-cardin

RE: Partitioning

2010-02-23 Thread Jerry Schwartz
>-Original Message- >From: John Daisley [mailto:mg_s...@hotmail.com] >Sent: Tuesday, February 23, 2010 6:07 AM >To: jschwa...@the-infoshop.com ; mysql@lists.mysql.com >Subject: RE: Partitioning > >Hi Jerry, > >I guess modification of the table is needed! What are

RE: Partitioning

2010-02-23 Thread John Daisley
Hi Jerry, I guess modification of the table is needed! What are you trying to achieve by partitioning? If the primary key is rarely used then maybe adding another column with a numeric value based on `prod_id` and adding that column to the primary key would work and at least let you do some ha

Re: Partitioning

2010-02-23 Thread Johan De Meersman
that's very much gonna depend on what your selects look like. For example, a low-cardinality but often-where'd field makes an interesting candidate, as such a partitioning will take the size of your table scans down. If you know that you'll mostly access just last month's data, partition on year+mo

Re: Partitioning in mysql

2007-12-05 Thread Norbert Tretkowski
Am Mittwoch, den 05.12.2007, 17:59 +0530 schrieb Krishna Prajapati: > Suggest me some link for partitioining. http://dev.mysql.com/tech-resources/articles/mysql_5.1_partitions.html http://dev.mysql.com/doc/refman/5.1/en/partitioning.html Norbert -- MySQL General Mailing List For list a