Re: Partitioning...

 BTW , I can not see the planner to prune/isolate the right table/partion ?
(constraint_exclusion=on, Version= 8.1.3 on RHEL4)

postgres=#  explain analyze  select count(id1) from part_all  where id1 =12 ;
                                                                   QUERY PLAN

---------------------------------------------------------------------------------------------------
 Aggregate  (cost=5951.74..5951.75 rows=1 width=4) (actual time=111.687..111.688 rows=1 loops=1)
   ->  Append  (cost=164.60..5463.19 rows=39084 width=49) (actual time=4.764..91.488 rows=13203 loops=1)
         ->  Bitmap Heap Scan on part_id1_0_10  (cost=164.60..3577.60 rows=25600 width=49) (actual time=0.123..0.123
rows=0 loops=1)
               Recheck Cond: (id1 = 12)
               ->  Bitmap Index Scan on idx_part_id1_0_10  (cost=0.00..164.60 rows=25600 width=0) (actual
time=0.119..0.119 rows=0 loops=1)
                     Index Cond: (id1 = 12)
         ->  Bitmap Heap Scan on part_id1_11_20  (cost=88.19..1494.74 rows=13484 width=49) (actual time=4.635..55.140
rows=13203 loops=1)
               Recheck Cond: (id1 = 12)
               ->  Bitmap Index Scan on idx_part_id1_11_20  (cost=0.00..88.19 rows=13484 width=0) (actual
time=4.067..4.067 rows=13205 loops=1)
                     Index Cond: (id1 = 12)
 Total runtime: 111.812 ms
(11 rows)

Time: 114.779 ms


Regards. Milen


-----Original Message-----
From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-owner@postgresql.org] On Behalf Of Tom Lane
Sent: Tuesday, June 13, 2006 12:18 AM
To: Milen Kulev
Cc: pgsql-general@postgresql.org
Subject: Re: [GENERAL] Partitioning...


"Milen Kulev" <makulev@gmx.net> writes:
> But When I issue:
>  insert into  part(id1, id2, filler)
>  select
>  round(  (random()*20)::bigint,0) as id1, <---!!! Note that both partitions should be populated!
>  round( (random()*20)::bigint,0) as id2,
>  'TTTTTTTTTTTESTTTTTZZZZZZZZZZZZZZZZZZZ'
>  from  generate_series(0,100000);

>  ERROR:  new row for relation "part_id1_0_10" violates check
> constraint "part_id1_0_10_id1_check"

Don't use random() in your test case.

            regards, tom lane

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