|From:||Evgeniy Efimkin <efimkin(at)yandex-team(dot)ru>|
|To:||Stephen Frost <sfrost(at)snowman(dot)net>|
|Cc:||"pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Дмитрий Сарафанников <dsarafan(at)yandex-team(dot)ru>, Андрей Бородин <x4mmm(at)yandex-team(dot)ru>, Владимир Бородин <root(at)simply(dot)name>|
|Subject:||Re: [WIP] CREATE SUBSCRIPTION with FOR TABLES clause (table filter)|
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I wrote some tests(it's just 01_rep_changes.pl but for non superuser) and fix `DROP TABLE` from subscription. Now old and new tests pass.
22.11.2018, 16:23, "Evgeniy Efimkin" <efimkin(at)yandex-team(dot)ru>:
> New draft attached with filtering table in subscription (ADD/DROP) and allow non-superusers use` CREATE SUBSCRIPTION` for own tables.
> 14.11.2018, 18:10, "Evgeniy Efimkin" <efimkin(at)yandex-team(dot)ru>:
>> I started work on patch (draft attached). Draft has changes related only to `CREATE SUBSCRIPTION`.
>> I also introduce a new status (DEFFERED) for tables in `FOR TABLE` clause (but not in publication).
>> New column in pg_subscription (suballtables) will be used in `REFRESH` clause
>> 09.11.2018, 15:24, "Evgeniy Efimkin" <efimkin(at)yandex-team(dot)ru>:
>>> In order to support create subscription from non-superuser, we need to make it possible to choose tables on the subscriber side:
>>> 1. add `FOR TABLE` clause in `CREATE SUBSCRIPTION`:
>>> CREATE SUBSCRIPTION subscription_name
>>> CONNECTION 'conninfo'
>>> PUBLICATION publication_name [, ...]
>>> [ FOR TABLE [ ONLY ] table_name [ * ] [, ...]| FOR ALL TABLES ]
>>> [ WITH ( subscription_parameter [= value] [, ... ] ) ]
>>> ... where `FOR ALL TABLES` is only allowed for superuser.
>>> and table list in `FOR TABLES` clause will be stored in pg_subscription_rel table (maybe another place?)
>>> 2. Each subscription should have "all tables" attribute.
>>> For example via a new column in pg_subscription "suballtables".
>>> 3. Add `ALTER SUBSCRIPTION (ADD TABLE | DROP TABLE)`:
>>> ALTER SUBSCRIPTION subscription_name ADD TABLE [ ONLY ] table_name [WITH copy_data];
>>> ALTER SUBSCRIPTION subscription_name DROP TABLE [ ONLY ] table_name;
>>> 4. On `ALTER SUBSCRIPTION <name> REFRESH PUBLICATION` should check if table owner equals subscription owner. The check is ommited if subscription owner is superuser.
>>> 5. If superuser calls `ALTER SUBSCRIPTION REFRESH PUBLICATION` on subscription with table list and non-superuser owner, we should filter tables which owner is not subscription's owner or maybe we need to raise error?
>>> What do you think about it? Any objections?
>>> 07.11.2018, 00:52, "Stephen Frost" <sfrost(at)snowman(dot)net>:
>>>> * Evgeniy Efimkin (efimkin(at)yandex-team(dot)ru) wrote:
>>>>> As a first step I suggest we allow CREATE SUBSCRIPTION for table owner only.
>>>> That's a nice idea but seems like we would want to have a way to filter
>>>> what tables a subscription follows then..? Just failing if the
>>>> publication publishes tables that we don't have access to or are not the
>>>> owner of seems like a poor solution..
>>> Ефимкин Евгений
>> Ефимкин Евгений
> Ефимкин Евгений
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