From: | Maksim Milyutin <m(dot)milyutin(at)postgrespro(dot)ru> |
---|---|
To: | Greg Stark <stark(at)mit(dot)edu> |
Cc: | Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Robert Haas <robertmhaas(at)gmail(dot)com> |
Subject: | Re: Proposal: Local indexes for partitioned table |
Date: | 2017-04-10 11:32:11 |
Message-ID: | 446db866-350b-297c-1463-dbb0d0c5243f@postgrespro.ru |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
On 10.04.2017 13:46, Greg Stark wrote:
> On 4 April 2017 at 17:10, Maksim Milyutin <m(dot)milyutin(at)postgrespro(dot)ru> wrote:
>>
>> 3. As I noticed early pg_depend table is used for cascade deleting indexes
>> on partitioned table and its children. I also use pg_depend to determine
>> relationship between parent and child indexes when reindex executes
>> recursively on child indexes.
>>
>> Perhaps, it's not good way to use pg_depend to determine the relationship
>> between parent and child indexes because the kind of this relationship is
>> not defined. I could propose to add into pg_index table specific field of
>> 'oidvector' type that specify oids of dependent indexes for the current
>> local index.
>
>
> Alternately you could have an single oid in pg_index on each of the
> children that specifies which local index is its parent. That would
> probably require a new index on that column so you could look up all
> the children efficiently.
>
> I think it would behave more sensibly when you're adding or removing a
> partition, especially if you want to add many partitions in parallel
> using multiple transactions. An oidvector of children would
> effectively mean you could only be doing one partition creation or
> deletion at a time.
>
Thanks for your comment. Your approach sounds better than mine. I'll try it.
--
Maksim Milyutin
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company
From | Date | Subject | |
---|---|---|---|
Next Message | Tom Lane | 2017-04-10 11:34:04 | Re: [sqlsmith] Planner crash on foreign table join |
Previous Message | Robert Haas | 2017-04-10 11:20:49 | Re: Proposal: Local indexes for partitioned table |