Message-ID: <23a29125a2d07f96d49f97c31fcdb09a7f0ff6c1.camel@j-davis.com>
Subject: Re: Introduce new multi insert Table AM and improve performance of
 various SQL commands with it for Heap AM
From: Jeff Davis <pgsql@j-davis.com>
To: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Cc: Masahiko Sawada <sawada.mshk@gmail.com>, PostgreSQL-development
 <pgsql-hackers@postgresql.org>, Andres Freund <andres@anarazel.de>, Dilip
 Kumar <dilipbalaut@gmail.com>, Luc Vlaming <luc@swarm64.com>, Justin Pryzby
 <pryzby@telsasoft.com>, Michael Paquier <michael@paquier.xyz>, Matthias van
 de Meent <boekewurm+postgres@gmail.com>, Alexander Korotkov
 <aekorotkov@gmail.com>
Date: Tue, 27 Aug 2024 14:43:59 -0700
In-Reply-To: <d079c042180a698179384d6a7a3109cd8310e285.camel@j-davis.com>
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On Mon, 2024-08-26 at 14:18 -0700, Jeff Davis wrote:
> 0001 implementation issues:
>=20
> * We need default implementations for AMs that don't implement the
> new
> APIs, so that the AM will still function even if it only defines the
> single-tuple APIs. If we need to make use of the AM's multi_insert
> method (I'm not sure we do), then the default methods would need to
> handle that as well. (I thought a previous version had these default
> implementations -- is there a reason they were removed?)

On second thought, it would be easier to just have the caller check
whether the AM supports the multi-insert path; and if not, fall back to
the single-tuple path. The single-tuple path is needed anyway for cases
like before-row triggers.

Regards,
	Jeff Davis