Re: typecasting numeric(18,4) to varchar/text

Am 04.05.2004 16:37 schrieb Andrew Sullivan:

> On Tue, May 04, 2004 at 09:35:31AM -0400, ashok@kalculate.com wrote:
> 
>>create table a (a numeric(18,4));
>>create table b (b varchar(25));
>>insert into a values(12000.43);
>>insert into b select (a.a)::varchar;
> 
> 
> Which version is that?  Here's my session:
> 
> andrewtest=# create table a (a numeric(18,4));
> CREATE TABLE
> andrewtest=# create table b (b varchar(25));
> CREATE TABLE
> andrewtest=# insert into a values(12000.43);
> INSERT 17168 1
> andrewtest=# insert into b select (a.a)::varchar;
> INSERT 17169 1
> 
> That's on 7.4.2.  You might want to try casting to text first.
> 

Yes, it also works for me with Version 7.4.2.
I found an older postgres DB with Version 7.2 and I get the same
error as ashok

demo=# select a::varchar from a;
ERROR:  Cannot cast type 'numeric' to 'character varying'

demo=# select a::text from a;
ERROR:  Cannot cast type 'numeric' to 'text'

demo=# select '\'' || a || '\'' from a;;
ERROR:  Unable to identify an operator '||' for types 'unknown'
and 'numeric'
You will have to retype this query using an explicit cast

Greetings,
Martin


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Martin Knipper
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Mail : knipper@mk-os.de

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