Re: BUG #18307: system columns does not support using join
От
David G. Johnston
Тема
Re: BUG #18307: system columns does not support using join
Дата
Msg-id
CAKFQuwbpw_WhcB=w_MwUWjMGVYH=Hxr3bW0vOpbLH8QFMsgqxg@mail.gmail.com
Ответ на
BUG #18307: system columns does not support using join (PG Bug reporting form)
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Дерево обсуждения
BUG #18307: system columns does not support using join PG Bug reporting form <noreply@postgresql.org>
Re: BUG #18307: system columns does not support using join "David G. Johnston" <david.g.johnston@gmail.com>
Re: BUG #18307: system columns does not support using join Tom Lane <tgl@sss.pgh.pa.us>
Re: BUG #18307: system columns does not support using join RekGRpth <rekgrpth@gmail.com>
On Tuesday, January 23, 2024, PG Bug reporting form <noreply@postgresql.org> wrote:
The following bug has been logged on the website:
Bug reference: 18307
Logged by: RekGRpth
Email address: rekgrpth@gmail.com
PostgreSQL version: 16.1
Operating system: docker alpine
Description:
create table t(i int);
explain (costs off) select * from t join t tt on t.xmin = tt.xmin;
QUERY PLAN
---------------------------------
Hash Join
Hash Cond: (t.xmin = tt.xmin)
-> Seq Scan on t
-> Hash
-> Seq Scan on t tt
(5 rows)
explain (costs off) select * from t join t tt using (xmin);
ERROR: column "xmin" specified in USING clause does not exist in left table
I don’t this being worth the effort to change, and really seems like completely expected behavior. “Select *” doesn’t output xmin, it requires explicit table qualification to see it. This is the same thing.
David J.
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