Date: Tue, 21 May 2024 10:37:18 +0000
To: postgre <pgsql-general@lists.postgresql.org>
From: Laura Smith <n5d9xq3ti233xiyif2vp@protonmail.ch>
Subject: Re: How to update upper-bound of tstzrange ?
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Thanks all for your answers !  Much appreciated.


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On Tuesday, 21 May 2024 at 11:02, Laurenz Albe <laurenz.albe@cybertec.at> w=
rote:

> On Mon, 2024-05-20 at 13:56 +0200, Erik Wienhold wrote:
>=20
> > On 2024-05-20 12:30 +0200, Laura Smith wrote:
> >=20
> > > 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 =
where 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_time=
s) + 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-CONS=
TRUCT
>=20
>=20
> If you need to preserve the information whether the upper and lower bound=
s
> are inclusive or not, you could
>=20
> 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 ...
>=20
> Yours,
> Laurenz Albe