Re: Syntax for partitioning

From: Peter Eisentraut <peter_e(at)gmx(dot)net>
To: Itagaki Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Syntax for partitioning
Date: 2009-10-29 22:10:57
Message-ID: 1256854257.9673.1.camel@vanquo.pezone.net
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On tor, 2009-10-29 at 11:15 +0900, Itagaki Takahiro wrote:
> Range partitioning:
> CREATE TABLE table_name ( columns )
> PARTITION BY RANGE ( a_expr )
> (
> PARTITION name VALUES LESS THAN [(] const [)],
> PARTITION name VALUES LESS THAN [(] MAXVALUE [)] -- overflow partition
> );

Maybe this needs to mention the actual operator name instead of LESS
THAN, in case the operator is not named < or the user wants to use a
different one.

> Hash partitioning:
> CREATE TABLE table_name ( columns )
> PARTITION BY HASH ( a_expr )
> PARTITIONS num_partitions;
>
> CREATE TABLE table_name ( columns )
> PARTITION BY HASH ( a_expr )
> (
> PARTITION name,
> ...
> );

Unless someone comes up with a maintenance plan for stable hash
functions, we should probably not dare look into this yet.

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