Search Postgresql Archives

Re: views, queries, and locks

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, Apr 3, 2012 at 2:45 PM, Thomas Kellerer <spam_eater@xxxxxxx> wrote:
> Jon Nelson wrote on 03.04.2012 20:41:
>
>> Close, but not quite. It's not rotation but every N minutes a
>> newly-built table appears. I'd like that table to appear as part of
>> the view as soon as possible.
>
>
> Can't you use table inheritance for that?


Not efficiently. My view looks like this:

select <bunch of stuff from table A>, DATE 'date string here' as
some_date_column
UNION ALL
select <bunch of stuff from table B>, DATE 'date string here' as
some_date_column
....

for lots and lots of tables. Storing that DATE would be cost
prohibitive and inefficient, since the same value would be used
throughout each 'sub' table. This let's me do queries that involve
'some_date_column' and the query optimizer will remove the tables that
don't apply, etc.

-- 
Jon

-- 
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux