On Sun, Jan 7, 2018 at 3:47 PM, Greg Landrum <greg.land...@gmail.com> wrote:

>
> On Sat, Jan 6, 2018 at 6:32 AM, Rajarshi Guha <rajarshi.g...@gmail.com>
> wrote:
>
>>
>> Interestingly, what ever query SMILES I put in, the expected row count
>> for the Bitmap Index Scan is always 1727. Is this by design?
>>
>
> "by design" makes it sound better thought out than it is... this is what
> the code does. :-S
>
> The cartridge is not well integrated with the query planner. I would
> assume that this is a solvable problem, but it's not something I've ever
> managed to set aside a big enough chunk of time to really dig into.
>

If anyone has an interest in this topic, the relevant bits of the
postgresql documentation are here:
https://www.postgresql.org/docs/9.5/static/xoper-optimization.html

-greg
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