Re: should CREATE INDEX ON partitioned_table call PreventInTransactionBlock() ?

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Justin Pryzby <pryzby(at)telsasoft(dot)com>
Cc: pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: should CREATE INDEX ON partitioned_table call PreventInTransactionBlock() ?
Date: 2020-06-08 16:21:44
Message-ID: 20200608162144.GA26108@alvherre.pgsql
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On 2020-Jun-08, Justin Pryzby wrote:

> On Mon, Jun 08, 2020 at 11:27:26AM -0400, Alvaro Herrera wrote:

> > Well, that would also require that transactions are committed and
> > started for each partition. Merely adding PreventInTransactionBlock
> > would not do that. Moreover, since this would break DDL-in-transactions
> > that would otherwise work, it should be optional and thus need a keyword
> > in the command. But CONCURRENTLY isn't it (because that means something
> > else) so we'd have to discuss what it would be.
>
> I wasn't thinking of a new feature but rather if it would be desirable to
> change behavior for v14 to always start/commit transaction for each partition.

Well, I was saying that I don't think a blanket behavior change is
desirable. For example, if you have a script that creates a partitioned
table and a few partitions and a few indexes, and it does all that in a
transaction, it'll break.

--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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