Re: [GENERAL] Problems with non use of indexes

2012-03-02 Thread Tyler Durden
", "auth_user"."first_name", "auth_user"."last_name", "auth_user"."email", "auth_user"."password", "auth_user"."is_staff", "auth_user"."is_active", "auth_user"."

Re: [GENERAL] Problems with non use of indexes

2012-03-02 Thread Tyler Durden
On Fri, Mar 2, 2012 at 12:55 PM, Tomas Vondra wrote: > On 2 Březen 2012, 13:45, Tyler Durden wrote: > >> > > Yes, but if I remove *U0."user_id" = 1 *will use the index: > > Which PostgreSQL version is that? Post EXPLAIN ANALYZE output for all > thr

Re: [GENERAL] Problems with non use of indexes

2012-03-02 Thread Tyler Durden
Hi, On Fri, Mar 2, 2012 at 12:23 PM, Tomas Vondra wrote: > Hi, > > On 2 Březen 2012, 13:12, Tyler Durden wrote: > > Hi, > > I can't figure out why query planner doesn't use the proper index, anyone > > can help me? > > > > This query proper

[GENERAL] Problems with non use of indexes

2012-03-02 Thread Tyler Durden
Hi, I can't figure out why query planner doesn't use the proper index, anyone can help me? This query properly uses indexes: mydb=# EXPLAIN SELECT U0."object_id" FROM "activity_follow" U0 WHERE (U0."content_type_id" = 3 AND U0."user_id" = 1); QUERY PLAN --

[GENERAL] Dumping without Postgis functions

2009-10-12 Thread Tyler Durden
Hi, I'm trying to migrate a database from an old posgresql 8.1 server to a new one 8.3. I have the Postgis installed on that old database, that is not used. When I try to restore the database, several errors happens because of the various links to libs of Postgis on the disk . How do I dump the da

Re: [GENERAL] Seq Scan

2007-06-01 Thread Tyler Durden
Ok, Thank all for the clarification. ---(end of broadcast)--- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq

Re: [GENERAL] Seq Scan

2007-06-01 Thread Tyler Durden
Ok, my bad. But why this happens: # explain ANALYZE select id from table_name where id>20; QUERY PLAN

Re: [GENERAL] Seq Scan

2007-06-01 Thread Tyler Durden
Yes, either case happens the same. I'm come recently from MySQL and it works in a different way. I find strange that a simple SELECT COUNT(...) is so slow with only 700 000 records. Has been a nightmare optimizing this tables/queries. Sorry about this silly question, but I'm new to Posgresql. Th

[GENERAL] Seq Scan

2007-06-01 Thread Tyler Durden
Hi, I'm having some problems in performance in a simple select count(id) from I have 700 000 records in one table, and when I do: # explain select (id) from table_name; -[ RECORD 1 ] QUERY PLAN | Seq Scan on table_name (cost=0.0