From: | Kouber Saparev <kouber(at)gmail(dot)com> |
---|---|
To: | pgsql-general(at)postgresql(dot)org |
Subject: | Cannot convert partitioned table to a view |
Date: | 2022-10-06 12:26:33 |
Message-ID: | CAN4RuQt7Yp3CX583y8KR9SbqdxaNo6BmR=RwKD1o=UypgE2bng@mail.gmail.com |
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Lists: | pgsql-general |
Is there a special reason why masking views behind table partitions is not
allowed?
Trying to do so raises an error:
CREATE RULE "_RETURN" AS ON SELECT TO xxx_20220715 DO INSTEAD SELECT * FROM
yyy WHERE ...;
ERROR: cannot convert partitioned table "xxx_20220715" to a view
https://github.com/postgres/postgres/blob/master/src/backend/rewrite/rewriteDefine.c#L434
That said, I can trick it if I have a view on a remote server and then
attach it as a remote partition through the foreign data wrapper.
Are there any dangers that should be considered with such an approach?
I noticed that attaching the "_RETURN" rule to a table converts it to a
view, and the operation is irreversible, i.e. once attached, I cannot drop
the rule and put the relation back to a table one.
Cordially,
--
Kouber Saparev
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