Keep notnullattrs in RelOptInfo (Was part of UniqueKey patch series)

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От Andy Fan
Тема Keep notnullattrs in RelOptInfo (Was part of UniqueKey patch series)
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Msg-id CAKU4AWpQjAqJwQ2X-aR9g3+ZHRzU1k8hNP7A+_mLuOv-n5aVKA@mail.gmail.com
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Ответы Re: Keep notnullattrs in RelOptInfo (Was part of UniqueKey patch series)  (Andy Fan <zhihui.fan1213@gmail.com>)
Re: Keep notnullattrs in RelOptInfo (Was part of UniqueKey patch series)  (David Rowley <dgrowleyml@gmail.com>)
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Hi:

This patch is the first patch in UniqueKey patch series[1], since I need to revise 
that series many times but the first one would be not that often, so I'd like to
submit this one for review first so that I don't need to maintain it again and again.

v1-0001-Introduce-notnullattrs-field-in-RelOptInfo-to-ind.patch

Introduce notnullattrs field in RelOptInfo to indicate which attr are not null
in current query. The not null is judged by checking pg_attribute and query's
restrictinfo. The info is only maintained at Base RelOptInfo and Partition's
RelOptInfo level so far.


Any thoughts?

--
Best Regards

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