From: | Tender Wang <tndrwang(at)gmail(dot)com> |
---|---|
To: | jian he <jian(dot)universality(at)gmail(dot)com> |
Cc: | PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
Subject: | Re: struct RelOptInfo member relid comments |
Date: | 2024-05-24 03:13:45 |
Message-ID: | CAHewXN=jL897jDMefhuRrM+KO8ZEBzvO+kjSAoanw_1JUYRaTA@mail.gmail.com |
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jian he <jian(dot)universality(at)gmail(dot)com> 于2024年5月24日周五 10:58写道:
> hi
>
> typedef struct RelOptInfo
> {
> ....
> /*
> * information about a base rel (not set for join rels!)
> */
> Index relid;
> ...
> }
>
> imho, the above comment is not very helpful.
> we should say more about what kind of information relid says about a base
> rel?
>
> I don't know much about RelOptInfo, that's why I ask.
>
>
> The fields in struct RelOptInfo between comment " information about a base
rel " and
commnet "Information about foreign tables and foreign joins" are all about
a base rel.
Every field has a comment. I think that's already helpful for understanding
what information
we need to optimize a base rel.
--
Tender Wang
OpenPie: https://en.openpie.com/
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