> > What causes this behaviour? is there any workaround? Suggestions? > > > > How many rows are there in the table, and can you post the > 'explain analyze' for both queries after doing a 'vacuum verbose analyze > [tablename]'?
There are about 2500 rows in that table. 1st query explain analyze: Seq Scan on PRIORITY_STATISTICS (cost=0.00..491.44 rows=127 width=12) (actual time=98.58..98.58 rows=0 loops=1) Total runtime: 98.74 msec 2nd query explain analyze: NOTICE: QUERY PLAN: Index Scan using PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id on PRIORITY_STATISTICS (cost=0.00..394.06 rows=102 width=12) (actual time=20.93..20.93 rows=0 loops=1) Total runtime: 21.59 msec Any help? Rigmor > > Cheers > > Matt > > > > --- > Incoming mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.515 / Virus Database: 313 - Release Date: 01.09.2003 > --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.515 / Virus Database: 313 - Release Date: 01.09.2003 ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
