Gregory Stark pisze:
> Grzegorz Jaśkiewicz <gj@pointblue.com.pl> writes:
>
>> So my question would be, why isn't postgresql using indexes for OVERLAPS,
>> and why optimizer doesn't substitute it with something like:
>>
>> (c <= a AND d > a) OR ( c >= a AND c < b)
>
> How would you use an index for that?
>
check Depesz'es article for that. I included it at the bottom of my email.