| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | gustavo halperin <ggh(dot)develop(at)gmail(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Dynamic Partial Index |
| Date: | 2006-08-17 18:18:07 |
| Message-ID: | 1155838687.26280.6.camel@dogma.v10.wvs |
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| Thread: | |
| Lists: | pgsql-general |
On Thu, 2006-08-17 at 20:50 +0300, gustavo halperin wrote:
> I'm interesting in a partial index for a rows that aren't older than 6
> mounts, something like the sentence below:
> --------------------------------------------------------------------------------------------------------------------------------------------------
> /CREATE INDEX name_for_the_index ON table (the_column_of_type_date)
>
> WHERE ( the_column_of_type_date > (current_date - interval '6
> month')::date );/
> --------------------------------------------------------------------------------------------------------------------------------------------------
> But this is not posible, I receive the next error:
> --------------------------------------------------------------------------------------------------------------------------------------------------
> ERROR: functions in index predicate must be marked IMMUTABLE
> --------------------------------------------------------------------------------------------------------------------------------------------------
> So, what is the best solution for my problem?
Create an index on the table, and then periodically move records into a
separate archive table.
Regards,
Jeff Davis
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