Message-ID: <82f02004dc5fd734c925d4db0c48190e8100a42d.camel@cybertec.at>
Subject: Re: How to update upper-bound of tstzrange ?
From: Laurenz Albe <laurenz.albe@cybertec.at>
To: Erik Wienhold <ewie@ewie.name>, Laura Smith
	 <n5d9xq3ti233xiyif2vp@protonmail.ch>
Cc: postgre <pgsql-general@lists.postgresql.org>
Date: Tue, 21 May 2024 12:02:56 +0200
In-Reply-To: <d45bbb8e-f42d-4bce-b3b0-46bce8f18ef4@ewie.name>
References: 
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	 <d45bbb8e-f42d-4bce-b3b0-46bce8f18ef4@ewie.name>
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Precedence: bulk

On Mon, 2024-05-20 at 13:56 +0200, Erik Wienhold wrote:
> On 2024-05-20 12:30 +0200, Laura Smith wrote:
> > Could someone kindly help me out with the correct syntax ?
> >=20
> > My first thought was the below but that doesn't work:
> >=20
> > update foo set upper(bar_times)=3Dupper(bar_times)+interval '1' hour wh=
ere bar_id=3D'abc';
> > ERROR:  syntax error at or near "("
> > LINE 1: update event_sessions set upper(bar_times)=3Dupper(bar_ti...
>=20
> Use the constructor function:
>=20
>     UPDATE foo SET bar_times =3D tstzrange(lower(bar_times), upper(bar_ti=
mes) + interval '1' hour);
>=20
> But this does not preserve the inclusivity/exclusivity of bounds from
> the input range, so you may have to pass in the third argument as well.
>=20
> https://www.postgresql.org/docs/current/rangetypes.html#RANGETYPES-CONSTR=
UCT

If you need to preserve the information whether the upper and lower bounds
are inclusive or not, you could

  UPDATE foo
  SET bar_times =3D tstzrange(
                     lower(bar_times),
                     upper (bar_times) + INTERVAL '1 hour',
                     CASE WHEN lower_inc(bar_times) THEN '[' ELSE '(' END |=
|
                     CASE WHEN upper_inc(bar_times) THEN ']' ELSE ')' END
                  )
  WHERE ...

Yours,
Laurenz Albe