Re: psql: print values and return the COUNT(*) value to bash?

From: Jehan-Guillaume de Rorthais <jgdr(at)dalibo(dot)com>
To: Ron Johnson <ronljohnsonjr(at)gmail(dot)com>
Cc: pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: Re: psql: print values and return the COUNT(*) value to bash?
Date: 2025-12-29 08:12:36
Message-ID: 20251229091236.4ebacf38@karst
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On Mon, 29 Dec 2025 02:21:41 -0500
Ron Johnson <ronljohnsonjr(at)gmail(dot)com> wrote:

> More stuff happens after this. I want to print out these four lines, but
> also test the COUNT(*) value and bypass other bash commands if the count ==
> 0.

You should probably output your result from psql in a parsable way (CSV ? TSV ?
custom ?) for your bash script, then print values from bash. The commands
"column" or "printf" could help you format a pretty table if really needed.

> Is there any relatively simple way to do this (psql print and return
> count(*))?

Not in a clean way. To make psql return something else than 0, you need to
trigger an error with a failing query to make it return 3 when ON_ERROR_STOP is
enabled.

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