Re: POC, WIP: OR-clause support for indexes

On Sat, Nov 25, 2023 at 1:10 PM Alena Rybakina
<a.rybakina@postgrespro.ru> wrote:
> On 25.11.2023 04:13, Alexander Korotkov wrote:
>
> It seems to me there is a confusion.  I didn't mean we need to move
> conversion of OR-expressions to ANY into choose_bitmap_and() function
> or anything like this.  My idea was to avoid degradation of plans,
> which I've seen in [1].  Current code for generation of bitmap paths
> considers the possibility to split OR-expressions into distinct bitmap
> index scans.  But it doesn't consider this possibility for
> ANY-expressions.  So, my idea was to enhance our bitmap scan
> generation to consider split values of ANY-expressions into distinct
> bitmap index scans.  So, in the example [1] and similar queries
> conversion of OR-expressions to ANY wouldn't affect the generation of
> bitmap paths.
>
> Thanks for the explanation, yes, I did not understand the idea correctly at first. I will try to implement something
similar.

Alena, great, thank you.  I'm looking forward to the updated patch.

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Regards,
Alexander Korotkov