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From: Tom Lane <tgl@sss.pgh.pa.us>
To: David G. Johnston <david.g.johnston@gmail.com>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: Yugo Nagata <nagata@sraoss.co.jp>
Cc: PostgreSQL mailing lists <pgsql-bugs@lists.postgresql.org>
Subject: Re: BUG #17434: CREATE/DROP DATABASE can be executed in the same transaction with other commands
Date: Tue, 26 Jul 2022 12:14:19 -0400
Message-ID: <2363212.1658852059@sss.pgh.pa.us> (raw)
In-Reply-To: <CAKFQuwYaN+SJyHcXyjAwZ7zRCze+6Xj7ns_hOEg2+fhZEJUOHg@mail.gmail.com>
References: <17434-d9f7a064ce2a88a3@postgresql.org>
	<YtCrjN0HLew0w4Ss@momjian.us>
	<3190751.1657845414@sss.pgh.pa.us>
	<CAKFQuwbY_vJWcvJLUz2r+zzwwhkJbjzjojfGx=Mvd9TZ0TTKew@mail.gmail.com>
	<3498921.1657919211@sss.pgh.pa.us>
	<CAKFQuwa9JQgKgg3Djrx=7p1Phhj68QEq0TWYG72Xv-nPz61r0w@mail.gmail.com>
	<805866.1658175624@sss.pgh.pa.us>
	<CAKFQuwYQpm6E4nTgiOZAGRg0JKquHaXQ0JkqruWeHuOQX6-70g@mail.gmail.com>
	<2350990.1658848101@sss.pgh.pa.us>
	<CAKFQuwYRYhF8iOD9MHp7VuZur_JvVEjDzpMHuUHNeYReB5v2Sw@mail.gmail.com>
	<2356216.1658849834@sss.pgh.pa.us>
	<CAKFQuwYxPhPVMGJ-uoV7rq291xAU3dwww2fWwMuaz6EPiruJ5g@mail.gmail.com>
	<2361330.1658851386@sss.pgh.pa.us>
	<CAKFQuwYaN+SJyHcXyjAwZ7zRCze+6Xj7ns_hOEg2+fhZEJUOHg@mail.gmail.com>

"David G. Johnston" <david.g.johnston@gmail.com> writes:
> And we are back around to the fact that only by using libpq directly, or
> via the pipeline feature of pgbench, can one actually exert control over
> the implicit transaction.  The psql and general SQL interface
> implementation are just going to Sync after each command and so everything
> looks like one transaction per command to them and only explicit
> transactions matter.

Right.

> From that, the adjustment you describe above is sufficient for me.

Cool, I'll set about back-patching.

			regards, tom lane





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