On Sun, Jan 5, 2014 at 2:19 PM, Gavin Flower
<GavinFlower@archidevsys.co.nz> wrote:
> On 06/01/14 11:08, Sergey Konoplev wrote:
> [...]
>
>> An index might be considered as useless when there were no idx scans for
>> the significantly long period. However it might be non-trivial to define
>> this period. Eg. one have a query building an annual report that uses this
>> index and the period here is one year.
>
> [...]
>
> An index only used by an annual report, should possibly be only created
> prior to the report run & dropped immediately afterwards - why carry its
> overhead for the bulk of the year?
I fully agree. This is the matter of implementation.
--
Kind regards,
Sergey Konoplev
PostgreSQL Consultant and DBA
http://www.linkedin.com/in/grayhemp
+1 (415) 867-9984, +7 (901) 903-0499, +7 (988) 888-1979
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