Re: Casting json (or jsonb) to real

Thanks, yeah, a lot of this stored by json.dumps(v) in python, so this will
allow me to update the column...

On Tue, May 31, 2022 at 6:18 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Wells Oliver <wells(dot)oliver(at)gmail(dot)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
>

--
Wells Oliver
wells(dot)oliver(at)gmail(dot)com <wellsoliver(at)gmail(dot)com>