Re: Dynamic Partial Index

Jeff Davis wrote:
> On Fri, 2006-08-18 at 00:19 +0300, gustavo halperin wrote:
>
>>> Create an index on the table, and then periodically move records into a
>>> separate archive table.
>>>
>>> Regards,
>>>     Jeff Dave
>>>
>> Thanks, but I have a question. If the table is a BIIIIIIG table, use
>> your solution is still a good idea ?? What about to create a partial
>> INDEX for the really current date (and not using the function
>> current_date) and periodically dropped and created it with the current
>> day again and again ??
>>
>>
>
> If you continue to drop and recreate an index like that, it will need to
> scan the table during the creation of the index. That will take a while
> on a large table.
>
> You might be better off just using a normal index. To search the index
> only takes log(n) time. What problem are you currently having with a
> normal index?
>
> The downside of a normal index on a large table is that the index will
> grow large and consume space. I think the solution is to move seldom-
> accessed records to a separate archive table. That way, you don't ever
> have to scan the archive table unless you do a search in the archives.
>
> Regards,
>     Jeff Davi
OK, I become totally convinced now.  Thank you,
           Gustavo