From: Tom Lane <tgl@sss.pgh.pa.us>
To: Wells Oliver <wells.oliver@gmail.com>
Cc: pgsql-admin <pgsql-admin@postgresql.org>
Subject: Re: Casting json (or jsonb) to real
Date: Tue, 31 May 2022 21:18:18 -0400
Message-ID: <383082.1654046298@sss.pgh.pa.us> (raw)
In-Reply-To: <CAOC+FBVgADFvgpwTeSB=vU=Lv2ea_HvJZdZSZr5A7B=9d_p0Ww@mail.gmail.com>
References: <CAOC+FBW85OU9bRFC0ozNtiWFcGkMjCLv3fuVH8LSbiZ8qcX8_g@mail.gmail.com>
<378261.1654044651@sss.pgh.pa.us>
<CAOC+FBVgADFvgpwTeSB=vU=Lv2ea_HvJZdZSZr5A7B=9d_p0Ww@mail.gmail.com>
Wells Oliver <wells.oliver@gmail.com> writes:
> Well, it's because the representation of the value is getting double
> quoted, so it's
> select '"1.453"'::real, which yields ERROR: cannot cast jsonb string to
> type real.
Oh ... that perhaps wasn't a great choice. But it looks like you could
pretend the jsonb is a 1-element array, and do
regression=# select ('"1.4531"'::jsonb->>0)::real;
float4
--------
1.4531
(1 row)
regards, tom lane
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To: pgsql-admin@postgresql.org
Cc: tgl@sss.pgh.pa.us, wells.oliver@gmail.com
Subject: Re: Casting json (or jsonb) to real
In-Reply-To: <383082.1654046298@sss.pgh.pa.us>
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