Re: [SQL] calulating with money type impossible ?

The money type is deprecated in favour of the NUMERIC(9,2) (or whatever)
type. There indeed aren't a lot of functions and operators for money, and
no one is going to implement them now. In fact, type money might disappear
soon!

    -Peter

On 1999-11-05, De Moudt Walter mentioned:

> Hi,
>
> This is kind of a repost, because i didn't get any answers on it last
> time :-(
>
> Trying to find a way to calculate with the money-type. The kind of :
>
> select (sales_price/transport_costs) as trans_rate from account_details;
>
> to get the ratio of to amounts of money. The result should be a float!
>
> Well, it doesn't seem possible.
> In pg_proc table i found 2 procedures possibly usable for money
> conversion:
> cash_out(): takes one money argument, delivers a int4
> cash_in() : takes one argument (don't know what kind) and delivers a
> money-type.
>
> Here's what i got with it :
>
> bookbiz=> select cash_in(20);
> pqReadData() -- backend closed the channel unexpectedly.
> This probably means the backend terminated abnormally
> before or while processing the request.
> We have lost the connection to the backend, so further processing is
> impossible.  Terminating.
> \* so i reconnect \*
> [walter@localhost walter]$ psql bookbiz
>
> bookbiz=> select cash_out('$25.00');
>  cash_out
> ---------
> 136509096
> (1 row)
> bookbiz=> select cash_out('$25.00');
> cash_out
> ---------
> 136508128
> (1 row)
> bookbiz=>
> (2 different results for the same argument)
> So cash_in kicks me out, an cash_out just delivers nonsens.
>
> I'm using postgresql server version 6.5.2.1
> and client 6.5.1.2, RPM-versions on RedHat 6.0.
>
> Has any-one done better with money (on postgres) ?
> Please let me know, if it isn't possible as well.. then i just
> change my money-fields to floats
>
> Thanks
>
> De Moudt Walter.
>
> ************
>
>

--
Peter Eisentraut                  Sernanders vaeg 10:115
peter_e@gmx.net                   75262 Uppsala
http://yi.org/peter-e/            Sweden