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From: Igor Korot <ikorot01@gmail.com>
Date: Mon, 8 Dec 2025 23:53:08 -0800
Message-ID: <CA+FnnTye9NG93Bdp02qKcaKgdOzEMazhs9DNxZ8DMw9mcRXHjA@mail.gmail.com>
Subject: Re: How do I check for NULL
To: "David G. Johnston" <david.g.johnston@gmail.com>
Cc: "pgsql-generallists.postgresql.org" <pgsql-general@lists.postgresql.org>
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Hi, Davd,

On Mon, Dec 8, 2025 at 6:44=E2=80=AFPM David G. Johnston
<david.g.johnston@gmail.com> wrote:
>
> On Monday, December 8, 2025, Igor Korot <ikorot01@gmail.com> wrote:
>>
>>
>> However,, I'd like to still insert the record and I'd like to do somethi=
ng like:
>>
>> INSERT INTO test VALUES( 0, 'abc', 12345, IF( (SELECT foo FROM bar) =3D=
=3D
>> NULL, "postgres", <select_result>), /*more data follow*/);
>>
>> What would be the best way to achieve this?
>
>
> The =E2=80=9Ccoalesce=E2=80=9D function.

This is the query I use for my ODBC calls:

            qry2 =3D L"INSERT INTO \"test\" VALUES( ?, ?, (SELECT c.oid
FROM pg_class c, pg_namespace nc WHERE nc.oid =3D c.relnamespace AND
c.relname =3D ? AND nc.nspname =3D ?), COALESCE((SELECT tableowner FROM
pg_tables WHERE tablename =3D ? AND schemaname =3D ?), \"postgres\"), ...)
ON CONFLICT DO NOTHING;";

Calling SQLExecute after parameter binding results in

"L"ERROR: column \"postgres\" does not exist;\nError while preparing
parameters"std::basic_string<wchar_t,std::char_traits<wchar_t>,std::allocat=
or<wchar_t>
>

Thank you.
>
> David J.
>