| From: | Tatsuo Ishii <ishii(at)postgresql(dot)org> |
|---|---|
| To: | assam258(at)gmail(dot)com |
| Cc: | vik(at)postgresfriends(dot)org, er(at)xs4all(dot)nl, jacob(dot)champion(at)enterprisedb(dot)com, david(dot)g(dot)johnston(at)gmail(dot)com, peter(at)eisentraut(dot)org, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Row pattern recognition |
| Date: | 2026-02-24 11:44:17 |
| Message-ID: | 20260224.204417.914253025244188300.ishii@postgresql.org |
| Views: | Whole Thread | Raw Message | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Hi Henson,
Currently we do not account the cost of RPR while planning. Attached
is the first attempt to try to estimate the RPR costs. The cost model
is very simple:
expression cost per PATTERN variable * number of input tuples
Any idea to make this estimation better?
Best regards,
--
Tatsuo Ishii
SRA OSS K.K.
English: http://www.sraoss.co.jp/index_en/
Japanese:http://www.sraoss.co.jp
| Attachment | Content-Type | Size |
|---|---|---|
| unknown_filename | text/plain | 2.2 KB |
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