Re: PG14: "is of" vs pg_typeof

From: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
To: pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: Re: PG14: "is of" vs pg_typeof
Date: 2022-04-23 20:43:52
Message-ID: 8064cab0-31b1-7ac3-ebdb-c1522f4cee6b@aklaver.com
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On 4/23/22 13:14, Karsten Hilbert wrote:
> PostgreSQL 14.2-1
>
> Dear readers,

> Now, pg_typeof is an alternative but that only goes so far:
> it requires laboriously constructing an array on the right
> hand side for the above use case, along the lines of:
>
> select pg_typeof('a'::text) = any(ARRAY[pg_typeof(''::text), pg_typeof(''::name)]);
>
> Is there anything obvious I am missing for easily
> resurrecting the above "is of" use ?

Actually it can be done as:

select pg_typeof('test'::text) in ('text'::regtype, 'varchar'::regtype);
?column?
----------
t

select pg_typeof(1::int) in ('text'::regtype, 'varchar'::regtype);
?column?
----------
f

>
> Thanks,
> Karsten
> --
> GPG 40BE 5B0E C98E 1713 AFA6 5BC0 3BEA AC80 7D4F C89B
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com

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