Ave!
Tom Lane wrote:
>>trax=# explain select * from pakiety where stid = 234::smallint order by
>>received desc limit 1;
>
> The reason this won't use the (stid, received) index is that the
> requested sort order doesn't match that index. Try
>
> select * from pakiety where stid = 234::smallint
> order by stid desc, received desc
> limit 1;
Thanks. It works. And the speedup was from 2 minutes 32.13 seconds to
0.69 seconds (in a worst case for the previous scenario).
Thanks again for your help.
Piotr Sulecki.
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
