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From: Ibrahim Shaame <[email protected]>
To: Tom Lane <[email protected]>
Cc: [email protected]
Cc: [email protected] <[email protected]>
Subject: Re: Adding column in a recursive query
Date: Mon, 30 Mar 2026 18:11:08 +0300
Message-ID: <CAJOWwD6GpzqUjz6dn+3ye2fRz83EK6eb_buZ18bv4f_iENTJOw@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <CAJOWwD5_saumY5Xv1QAQ=VxwMQrz-tF6G-Fwek-ew52-=_uOXg@mail.gmail.com>
	<[email protected]>
	<CAJOWwD5XcMzwMrkaL-vD8d553y0BzQBppObZhau6zYxA4hj5nw@mail.gmail.com>
	<[email protected]>

Effectively, after removing the column names from x(jina, namba, nasaba_1)
it works now. Thank you very much. But then I don't understand the
advantage or inconvenience of naming or not naming the columns there. Is
there any explanation somewhere?

Thanks again
Ibrahim

On Mon, Mar 30, 2026 at 5:31 PM Tom Lane <[email protected]> wrote:

> Ibrahim Shaame <[email protected]> writes:
> > Thanks for the reply. Both are integers and they work well without the
> two
> > lines. So what changed one of them to text. Can you see where? I have not
> > been able to identify.
>
> This bit is forcing the column names for just the first three
> output columns, leaving the rest to default from the SELECT
> targetlist:
>
>         WITH RECURSIVE x(jina, namba, nasaba_1) AS (
>
> That's a hazardous practice: usually I'd force all or none of
> the column names that way.  In this case, I speculate that you
> carelessly added the new column as one of the physically first
> three SELECT outputs, and didn't adjust this list to match,
> leading to confusion about which column is "x.namba".
>
> If that's not it, you need to be a great deal more specific
> about exactly how you changed the query.
>
>                         regards, tom lane
>

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