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* Dynamic queries for Partitions
@ 2016-11-23 14:54 Metatrader EA <metatraderea@gmail.com>
0 siblings, 1 reply; 2+ messages in thread
From: Metatrader EA @ 2016-11-23 14:54 UTC (permalink / raw)
To: pgsql-sql
Hi,
When I run one query on one partitioned table.
Select * from customer where opendate = (date_trunc('month',
current_date)+'11 days'::interval)::date ;
This query will do that postgres will check all my partitions.
How can I do ?
Step 1 generate one sql that will be like "Select * from customer where
opendate = '2016-11-01' ;
Step 2 :: Then run code from step1.
Any advice?
//Bill
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: Dynamic queries for Partitions
@ 2016-11-24 09:22 Jan Ostrochovsky <jan.ostrochovsky@mobiletech.sk>
parent: Metatrader EA <metatraderea@gmail.com>
0 siblings, 0 replies; 2+ messages in thread
From: Jan Ostrochovsky @ 2016-11-24 09:22 UTC (permalink / raw)
To: Metatrader EA <metatraderea@gmail.com>; +Cc: pgsql-sql
Hello Bill,
if I understand correctly, you need to have constraint exclusion turned on and be careful about types - types in WHERE condition should be the same as those with CHECK constraint in partitioned table. Then you won't need 2 steps, but just one - one SELECT from master table fits all. Details are in the PostgreSQL documentation (Partitioning).
Jano
> From: "Metatrader EA" <metatraderea@gmail.com>
> To: "pgsql-sql" <pgsql-sql@postgresql.org>
> Sent: Wednesday, 23 November, 2016 15:54:03
> Subject: [SQL] Dynamic queries for Partitions
> Hi,
> When I run one query on one partitioned table.
> Select * from customer where opendate = (date_trunc('month', current_date)+'11
> days'::interval)::date ;
> This query will do that postgres will check all my partitions.
> How can I do ?
> Step 1 generate one sql that will be like "Select * from customer where opendate
> = '2016-11-01' ;
> Step 2 :: Then run code from step1.
> Any advice?
> //Bill
^ permalink raw reply [nested|flat] 2+ messages in thread
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