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help / color / mirror / Atom feedFrom: Adrian Klaver <[email protected]>
To: Marcos Pegoraro <[email protected]>
Cc: pgsql-general <[email protected]>
Subject: Re: Trying to understand pg_get_expr()
Date: Tue, 17 Mar 2026 13:36:34 -0700
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAB-JLwbwKi6q_fG7ByGRJe-L+m9Nx+WHiTP0qhEw7qKzv37QQA@mail.gmail.com>
References: <[email protected]>
<CAB-JLwZdyUfnC047MzV9woskWH2dToNJEudR34AD8WprEn8Cig@mail.gmail.com>
<[email protected]>
<CAB-JLwbwKi6q_fG7ByGRJe-L+m9Nx+WHiTP0qhEw7qKzv37QQA@mail.gmail.com>
On 3/17/26 1:26 PM, Marcos Pegoraro wrote:
> Em ter., 17 de mar. de 2026 às 17:19, Adrian Klaver
> <[email protected] <mailto:[email protected]>> escreveu:
>
> I also tried other combinations of casting both sides of "=" and it
> still did not work.
>
>
> "'test'::character varying" is the result of that function, not type of test
> This should work
> AND pg_get_expr(adbin, adrelid) = $$'test'::character varying$$;
Yeah that worked.
It begs the question then, in:
SELECT
adrelid::regclass,
pg_typeof(pg_get_expr(adbin, adrelid)),
pg_get_expr(adbin, adrelid)
FROM
pg_attrdef
WHERE
adrelid = 'default_test'::regclass;
adrelid | pg_typeof | pg_get_expr
--------------+-----------+---------------------------
default_test | text | 'test'::character varying
default_test | text | 0
Why is the second case not?:
'0'::integer
>
> regards
> Marcos
>
--
Adrian Klaver
[email protected]
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