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psql: Add variable SERVICEFILE

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This new psql variable can be used to check which service file has been
used for a connection.  Like other variables, this can be set in a
PROMPT or reported by an \echo, like these commands:
\echo :SERVICEFILE
\set PROMPT1 '=(%:SERVICEFILE:)%# '

This relies on commits 092f3c63ef and fef6da9e9c to retrieve this
information from the connection's PQconninfoOption.

Author: Ryo Kanbayashi <kanbayashi.dev@gmail.com>
Discussion: https://postgr.es/m/CAKkG4_nCjx3a_F3gyXHSPWxD8Sd8URaM89wey7fG_9g7KBkOCQ@mail.gmail.com
This commit is contained in:
Michael Paquier
2025-07-14 09:08:46 +09:00
parent 3c4e26a62c
commit 6b1c4d326b
2 changed files with 16 additions and 0 deletions
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9
doc/src/sgml/ref/psql-ref.sgml
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@ -4623,6 +4623,15 @@ bar
</listitem>
</varlistentry>
<varlistentry id="app-psql-variables-servicefile">
<term><varname>SERVICEFILE</varname></term>
<listitem>
<para>
The service file name, if applicable.
</para>
</listitem>
</varlistentry>
<varlistentry id="app-psql-variables-shell-error">
<term><varname>SHELL_ERROR</varname></term>
<listitem>