Re: [GENERAL] What query optimisations are included in Postgresql?

2013-11-29 Thread Albe Laurenz
N wrote: Are there documents specifying the query optimisations in Postgresql like the SQLite (http://www.sqlite.org/optoverview.html)? From the web, I can say, there are index and join optimisation, but are there anything others like Subquery flattening? There is subquery flattening:

Re: [GENERAL] What query optimisations are included in Postgresql?

2013-11-29 Thread John R Pierce
On 11/28/2013 9:46 AM, N wrote: Are there documents specifying the query optimisations in Postgresql like the SQLite (http://www.sqlite.org/optoverview.html)? From the web, I can say, there are index and join optimisation, but are there anything others like Subquery flattening? There's

[GENERAL] What query optimisations are included in Postgresql?

2013-11-28 Thread N
Are there documents specifying the query optimisations in Postgresql like the SQLite (http://www.sqlite.org/optoverview.html)? From the web, I can say, there are index and join optimisation, but are there anything others like Subquery flattening? thanks. Bentley. -- Sent via pgsql-general

Re: [GENERAL] What query optimisations are included in Postgresql?

2013-11-28 Thread Adrian Klaver
On 11/28/2013 09:46 AM, N wrote: Are there documents specifying the query optimisations in Postgresql like the SQLite (http://www.sqlite.org/optoverview.html)? http://www.postgresql.org/docs/9.3/interactive/overview.html http://www.postgresql.org/docs/9.3/interactive/performance-tips.html

Re: [GENERAL] What query optimisations are included in Postgresql?

2013-11-28 Thread N
Thanks, but still not same. For example, is there subquery flattening , is there any other query re-write ? is there website or books have such detail ? On Thu, Nov 28, 2013 at 5:54 PM, Adrian Klaver adrian.kla...@gmail.com wrote: On 11/28/2013 09:46 AM, N wrote: Are there documents

Re: [GENERAL] What query optimisations are included in Postgresql?

2013-11-28 Thread Adrian Klaver
On 11/28/2013 10:27 AM, N wrote: Thanks, but still not same. For example, is there subquery flattening , is there any other query re-write ? is there website or books have such detail ?