Re: Can psql show the column type of a result ?

On Wed, Sep 22, 2010 at 12:52 PM, "Nils O. Selåsdal"
<noselasd(at)asgaard(dot)homelinux(dot)org> wrote:
>  Hello,
> I'm wondering if there's a way to show the column type of a result with
> psql, e.g.
>
>> select sum(r) from mytable;
>   r
> -------
>  101.0
>
> I'd like to see the type of the 'r' column.
>
>
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From psql you can use:

\d mytable

sql to show this might look like:

SELECT a.attname,
pg_catalog.format_type(a.atttypid, a.atttypmod),
(SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid) for 128)
FROM pg_catalog.pg_attrdef d
WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef),
a.attnotnull, a.attnum
FROM pg_catalog.pg_attribute AS a
INNER JOIN pg_catalog.pg_class c
ON C.oid = a.attrelid
WHERE c.relname ~ '^(mytable)$' AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum;

--
Regards,
Richard Broersma Jr.

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