| From: | Andrei Lepikhov <a(dot)lepikhov(at)postgrespro(dot)ru> |
|---|---|
| To: | jian he <jian(dot)universality(at)gmail(dot)com> |
| Cc: | Alena Rybakina <a(dot)rybakina(at)postgrespro(dot)ru>, Alexander Korotkov <aekorotkov(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org, Peter Geoghegan <pg(at)bowt(dot)ie>, "Finnerty, Jim" <jfinnert(at)amazon(dot)com>, Marcos Pegoraro <marcos(at)f10(dot)com(dot)br>, teodor(at)sigaev(dot)ru, Ranier Vilela <ranier(dot)vf(at)gmail(dot)com>, Tomas Vondra <tomas(dot)vondra(at)enterprisedb(dot)com>, Peter Eisentraut <peter(at)eisentraut(dot)org> |
| Subject: | Re: POC, WIP: OR-clause support for indexes |
| Date: | 2024-02-19 08:35:19 |
| Message-ID: | cf0d1615-b594-404d-9a23-3d8ffd9070ec@postgrespro.ru |
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| Lists: | pgsql-hackers |
On 16/2/2024 19:54, jian he wrote:
> After setting these parameters, overall enable_or_transformation ON is
> performance better.
> sorry for the noise.
Don't worry, at least we know a weak point of partial paths estimation.
> so now I didn't find any corner case where enable_or_transformation is
> ON peforms worse than when it's OFF.
>
> +typedef struct OrClauseGroupEntry
> +{
> + OrClauseGroupKey key;
> +
> + Node *node;
> + List *consts;
> + Oid scalar_type;
> + List *exprs;
> +} OrClauseGroupEntry;
>
> I found that the field `scalar_type` was never used.
Thanks, fixed.
In attachment - v17 for both patches. As I see it, the only general
explanation of the idea is not addressed. I'm not sure how deeply we
should explain it.
--
regards,
Andrei Lepikhov
Postgres Professional
| Attachment | Content-Type | Size |
|---|---|---|
| v17-0001-Transform-OR-clause-to-ANY-expressions.patch | text/plain | 58.7 KB |
| v17-0002-Teach-generate_bitmap_or_paths-to-build-BitmapOr-pat.patch | text/plain | 32.2 KB |
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