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

"Milen Kulev" <makulev(at)gmx(dot)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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