Horton

Re: Row pattern recognition

Tatsuo Ishii <ishii@postgresql.org>

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From: Tatsuo Ishii <ishii@postgresql.org>
To: assam258@gmail.com
Cc: zsolt.parragi@percona.com, sjjang112233@gmail.com, vik@postgresfriends.org, er@xs4all.nl, jacob.champion@enterprisedb.com, david.g.johnston@gmail.com, peter@eisentraut.org, li.evan.chao@gmail.com, pgsql-hackers@postgresql.org
Date: 2026-05-12T06:03:28Z
Lists: pgsql-hackers

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Hi Henson,

> Attached is the v47 patches for Row pattern recognition (SQL/RPR).

> - Add src/backend/executor/README.rpr (previously was in ExecRPR.c)

README.rpr is extremely useful for those who want to review the RPR
patches.  I found a room to enhance the document.  Attached is a small
patch tries to enhance README.rpr, on top of v47.

- Make "target audience" and "scope" of the README more descriptive.
- Add References (currently the SQL standards only)
- Add explanation of some abbreviations (NFA, AST)
- Add reference sections for absorption. Readers might not be familiar with "absorption"
- Add more fields to WindowAggState
- Add window framing rules with RPR

Regards,
--
Tatsuo Ishii
SRA OSS K.K.
English: http://www.sraoss.co.jp/index_en/
Japanese:http://www.sraoss.co.jp