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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: "Anthonin Bonnefoy" <anthonin.bonnefoy@datadoghq.com>
Cc: Jelte Fennema-Nio <postgres@jeltef.nl>, Michael Paquier <michael@paquier.xyz>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2025-03-18T09:36:28Z
Lists: pgsql-hackers 
	Anthonin Bonnefoy wrote:

> 0002: Allows ';' to send a query using extended protocol when within a
> pipeline by using PQsendQueryParams

It's a nice improvement!

> with 0 parameters. It is not
> possible to send parameters with extended protocol this way and
> everything will be propagated through the query string, similar to a
> simple query.

It's actually possible to use parameters

\startpipeline 
\bind 'foo'
select $1;
\endpipeline

 ?column? 
----------
 foo
(1 row)

I suspect there's a misunderstanding that \bind can only be placed
after the query, because it's always written like that in the regression
tests, and in the documentation.
But that's just a notational preference.


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