| From: | Richard Guo <guofenglinux(at)gmail(dot)com> |
|---|---|
| To: | Haowu Ge <gehaowu(at)bitmoe(dot)com> |
| Cc: | pgsql-bugs <pgsql-bugs(at)lists(dot)postgresql(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Subject: | Re: GROUP BY ROLLUP queries on views trigger full table scans (index usage not optimized) |
| Date: | 2025-12-09 06:38:09 |
| Message-ID: | CAMbWs4-jteRUuZ63p3yyHG6=ggV9a3cNj_vMuYBrURhyXdMg_w@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Mon, Dec 8, 2025 at 3:10 PM Richard Guo <guofenglinux(at)gmail(dot)com> wrote:
> As a viable alternative, maybe we can use a lightweight, read-only
> expression walker on the operand tree first to detect the presence of
> any PHVs. We only trigger the expensive deep mutation if this
> preliminary check confirms that it is actually necessary.
Here is an updated patch along these lines.
Haowu, could you please verify if it fixes your query?
- Richard
| Attachment | Content-Type | Size |
|---|---|---|
| v2-0001-Strip-PlaceHolderVars-from-index-operands.patch | application/octet-stream | 12.3 KB |
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