| From: | Richard Guo <guofenglinux(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, sindysenorita(at)gmail(dot)com, pgsql-bugs(at)lists(dot)postgresql(dot)org |
| Subject: | Re: BUG #17618: unnecessary filter column <> text even after adding index |
| Date: | 2022-11-02 07:46:30 |
| Message-ID: | CAMbWs49oBk4EfHC+44xkuAwQYnGH5pyKP40=FwZv9Zecx9=3Mg@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Mon, Sep 26, 2022 at 7:42 PM Richard Guo <guofenglinux(at)gmail(dot)com> wrote:
> On Sat, Sep 24, 2022 at 8:41 AM Richard Guo <guofenglinux(at)gmail(dot)com>
> wrote:
>
>> Yeah, I agree that running eval_const_expressions here is expensive.
>> Maybe we can just do the reverse transformation in
>> create_bitmap_scan_plan against what we do for boolean index in
>> match_boolean_index_clause?
>>
>
> Following this idea, I come up with v2 patch. Is this the right
> direction to go?
>
Update with v3 patch, nothing changes except fixes a test failure
spotted by cfbot.
Thanks
Richard
| Attachment | Content-Type | Size |
|---|---|---|
| v3-0001-constant-folding-for-indexquals-in-bitmap-scan.patch | application/octet-stream | 5.0 KB |
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