Re: [HACKERS] How to create virtual indexes on postgres

2015-02-26 Thread Jim Nasby
On 2/26/15 6:17 AM, Sreerama Manoj wrote: But, it runs with Postgres 9.1 version...But I use 9.4..I think I cant use that. Or as an alternative Is there any provision in postgres to know use(Increase in Performance) of an index before creating that index. No. It might not be too hard to port

[HACKERS] How to create virtual indexes on postgres

2015-02-26 Thread Sreerama Manoj
Hi, I use Postgres 9.4 database.Now,I am optimizing the queries by using the results of explain and explain analyze,Sometimes I am creating Indexes to optimize them. But, I was not successful sometimes as even I create Index to optimize them, the planner is not using them . So my question

Re: [HACKERS] How to create virtual indexes on postgres

2015-02-26 Thread Michael Paquier
On Thu, Feb 26, 2015 at 6:20 PM, Sreerama Manoj manoj.sreerama...@gmail.com wrote: So my question was can we know whether the planner will use the index before actually creating a real Index..or can we create virtual or Hypothetical Index those can only be known to the planner and not the user

Re: [HACKERS] How to create virtual indexes on postgres

2015-02-26 Thread Sreerama Manoj
But, it runs with Postgres 9.1 version...But I use 9.4..I think I cant use that. Or as an alternative Is there any provision in postgres to know use(Increase in Performance) of an index before creating that index. On Thu, Feb 26, 2015 at 5:37 PM, Michael Paquier michael.paqu...@gmail.com wrote: