Re: [HACKERS] Declarative partitioning - another take

Hi, everyone!


08.12.16 18:25, Robert Haas wrote:
> Of course, this is the beginning, not the end.  I've been thinking
> about next steps -- here's an expanded list:
>
> - more efficient plan-time partition pruning (constraint exclusion is too slow)
> - run-time partition pruning
> - partition-wise join (Ashutosh Bapat is already working on this)
> - try to reduce lock levels
> - hash partitioning
> - the ability to create an index on the parent and have all of the
> children inherit it; this should work something like constraint
> inheritance.  you could argue that this doesn't add any real new
> capability but it's a huge usability feature.
> - teaching autovacuum enough about inheritance hierarchies for it to
> update the parent statistics when they get stale despite the lack of
> any actual inserts/updates/deletes to the parent.  this has been
> pending for a long time, but it's only going to get more important
> - row movement (aka avoiding the need for an ON UPDATE trigger on each
> partition)
> - insert (and eventually update) tuple routing for foreign partitions
> - not scanning the parent
> - fixing the insert routing so that we can skip tuple conversion where possible
> - fleshing out the documentation
>
I would like to work on two tasks: - insert (and eventually update) tuple routing for foreign partition. - the ability
tocreate an index on the parent and have all of the 
 
children inherit it;

The first one has been implemented in pg_pathman somehow, but the code 
relies on dirty hacks, so the FDW API has to be improved. As for the 
extended index support, it doesn't look like a super-hard task.

-- 
Maksim Milyutin
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company