Horton

Re: Feature: psql - display current search_path in prompt

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: Florents Tselai <florents.tselai@gmail.com>
Cc: Jim Jones <jim.jones@uni-muenster.de>, Jelte Fennema-Nio <postgres@jeltef.nl>, Lauri Siltanen <lauri.siltanen@gmail.com>, pgsql-hackers@postgresql.org
Date: 2025-10-23T20:52:23Z
Lists: pgsql-hackers 
On Thu, Jun 12, 2025 at 06:57:37PM +0300, Florents Tselai wrote:
> Absent any other feedback I'm marking this as Ready for Committer;
> Said committer can push back on my arbitrary %S selection
> https://commitfest.postgresql.org/patch/5808/

PQparameterStatus() will return NULL if the parameter is not known.  So,
with this patch, using %S in a prompt when connected to a <v18 version of
PostgreSQL will produce an empty string.  Given an empty string is a valid
value for search_path, I think we probably want to use a special value in
this case.  Perhaps we could use "?", which is much less likely to be a
value for search_path.

-- 
nathan

Commits

  1. Add psql PROMPT variable for search_path.

  2. doc PG 18 relnotes: add AFTER trigger user change item