Re: Add RESPECT/IGNORE NULLS and FROM FIRST/LAST options

Tatsuo Ishii <ishii@postgresql.org>

From: Tatsuo Ishii <ishii@postgresql.org>

To: krasiyan@gmail.com, ojford@gmail.com, tgl@sss.pgh.pa.us, vik@postgresfriends.org, andrew@tao11.riddles.org.uk, david@fetter.org

Cc: pgsql-hackers@lists.postgresql.org

Date: 2025-08-16T09:33:29Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Fix coding style with "else".
- 20628b62e46e 19 (unreleased) landed
Fix multi WinGetFuncArgInFrame/Partition calls with IGNORE NULLS.
- 2d7b247cb414 19 (unreleased) landed
Fix Coverity issue reported in commit 2273fa32bce.
- dd766a441d69 19 (unreleased) landed
Use ereport rather than elog in WinCheckAndInitializeNullTreatment.
- 5f3808646f67 19 (unreleased) landed
Avoid uninitialized-variable warnings from older compilers.
- 71540dcdcb22 19 (unreleased) cited
Fix Coverity issues reported in commit 25a30bbd423.
- 2273fa32bce7 19 (unreleased) landed
Improve EXPLAIN's display of window functions.
- 8b1b342544b6 18.0 cited
Automatically generate node support functions
- 964d01ae90c3 16.0 cited

Attachments

v18-0001-Modify-parse-analysis-modules-to-accept-RESPECT-.patch (application/octet-stream) patch v18-0001
v18-0002-Modify-get_windowfunc_expr_helper-to-handle-IGNO.patch (application/octet-stream) patch v18-0002
v18-0003-Modify-eval_const_expressions_mutator-to-handle-.patch (application/octet-stream) patch v18-0003
v18-0004-Modify-executor-and-window-functions-to-handle-I.patch (application/octet-stream) patch v18-0004
v18-0005-Modify-documents-to-add-null-treatment-clause.patch (application/octet-stream) patch v18-0005
v18-0006-Modify-window-function-regression-tests-to-test-.patch (application/octet-stream) patch v18-0006

Attached are the v18 patches for adding RESPECT/IGNORE NULLS options
to some window functions. Recent changes to doc/src/sgml/func.sgml
required v17 to be rebased. Other than that, nothing has been changed.

Oliver, do you have any comments on the patches?

> Attached are the v17 patches for adding RESPECT/IGNORE NULLS options
> defined in the standard to some window functions. FROM FIRST/LAST
> options are not considered in the patch (yet).
> 
> This time I split the patch into 6
> patches for reviewer's convenience. Also each patch has a short commit
> message to explain the patch.
> 
> 0001: parse and analysis
> 0002: rewriter
> 0003: planner
> 0004: executor
> 0005: documents
> 0006: tests

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