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Re: Add Pipelining support in psql

Daniel Verite <daniel@manitou-mail.org>

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From: "Daniel Verite" <daniel@manitou-mail.org>
To: "Michael Paquier" <michael@paquier.xyz>
Cc: Jelte Fennema-Nio <postgres@jeltef.nl>, Anthonin Bonnefoy <anthonin.bonnefoy@datadoghq.com>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2025-03-19T13:05:34Z
Lists: pgsql-hackers 
	Michael Paquier wrote:

> Perhaps an \extended command that behaves outside a pipeline makes
> sense to force the use of queries without parameters to use the
> extended mode, but I cannot get much excited about the concept knowing
> all the meta-commands we have now (not talking about the pipeline
> part, which is different, as we can treat queries in batches).

When psql started supporting the extended query protocol, the question
of enabling it more globally rather than query-by-query was discussed
a bit [1]. The idea was to switch to it with a setting or a variable
rather than a metacommand.
Some pros and cons were mentioned in the thread, but on the whole
it was not convincing enough to get implemented.

[1]
https://www.postgresql.org/message-id/e8dd1cd5-0e04-3598-0518-a605159fe314%40enterprisedb.com


Best regards,
-- 
Daniel Vérité 
https://postgresql.verite.pro/

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. psql: Fix assertion failures with pipeline mode

  2. psql: Rework TAP routine psql_fails_like() to define WAL sender context

  3. psql: Split extended query protocol meta-commands in --help=commands

  4. psql: Improve descriptions of \\flush[request] in --help

  5. psql: Fix incorrect status code returned by \getresults

  6. psql: Allow queries terminated by semicolons while in pipeline mode

  7. psql: Add \sendpipeline to send query buffers while in a pipeline

  8. psql: Fix memory leak with \gx used within a pipeline

  9. psql: Add pipeline status to prompt and some state variables

  10. Add more tests for utility commands in pipelines

  11. psql: Add support for pipelines

  12. Add braces for if block with large comment in psql's common.c