Re: Cast double precision to integer & check for overflow - Mailing list pgsql-general

From Adrian Klaver
Subject Re: Cast double precision to integer & check for overflow
Date
Msg-id 51046D55.1020709@gmail.com
Whole thread Raw
In response to Re: Cast double precision to integer & check for overflow  (Ian Pilcher <arequipeno@gmail.com>)
List pgsql-general
On 01/26/2013 03:09 PM, Ian Pilcher wrote:
> On 01/26/2013 05:06 PM, Alexander Gataric wrote:
>> Just cast to integer. Decimal portion will be lost.
>
> That part I've got.  :-)
>
> It's checking that the double precision value will actual fit within the
> range of the integer type (-2147483648 to +2147483647).  I could
> certainly hard-code these values, but I'd like to use a more expressive
> syntax, if it is available.
>

http://www.postgresql.org/docs/9.2/interactive/catalog-pg-type.html

production=# SELECT typname,typlen from pg_type where typname ='int8';
-[ RECORD 1 ]-
typname | int8
typlen  | 8



--
Adrian Klaver
adrian.klaver@gmail.com


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