From: | Michael Paquier <michael(at)paquier(dot)xyz> |
---|---|
To: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
Cc: | Andres Freund <andres(at)anarazel(dot)de>, Robert Haas <robertmhaas(at)gmail(dot)com>, Postgres hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
Subject: | Re: Custom table AMs need to include heapam.h because of BulkInsertState |
Date: | 2019-06-24 10:16:16 |
Message-ID: | 20190624101616.GI1637@paquier.xyz |
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Lists: | pgsql-hackers |
On Sat, Jun 15, 2019 at 12:25:12PM +1200, David Rowley wrote:
> With the attached version I'm just calling table_finish_bulk_insert()
> once per partition at the end of CopyFrom(). We've got an array with
> all the ResultRelInfos we touched in the proute, so it's mostly a
> matter of looping over that array and calling the function on each
> ResultRelInfo's ri_RelationDesc. However, to make it more complex,
> PartitionTupleRouting is private to execPartition.c so we can't do
> this directly... After staring at my screen for a while, I decided to
> write a function that calls a callback function on each ResultRelInfo
> in the PartitionTupleRouting.
Don't take me bad, but I find the solution of defining and using a new
callback to call the table AM callback not really elegant, and keeping
all table AM callbacks called at a higher level than the executor
makes the code easier to follow. Shouldn't we try to keep any calls
to table_finish_bulk_insert() within copy.c for each partition
instead?
> The other thing I noticed is that we call
> table_finish_bulk_insert(cstate->rel, ti_options); in copy.c
> regardless of if we've done any bulk inserts or not. Perhaps that
> should be under an if (insertMethod != CIM_SINGLE)
Yeah, good point.
--
Michael
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