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* datatype matrix (was: Re: Sorry..)
@ 2002-07-16 17:37 Kevin Brannen <kevinb@nurseamerica.net>
0 siblings, 2 replies; 3+ messages in thread
From: Kevin Brannen @ 2002-07-16 17:37 UTC (permalink / raw)
To: pgsql-sql
Josh Berkus wrote:
> Christopher,
>
>
>>In the bad old days when we couldn't distinguish explicit from implicit
>>cast functions, I was wary of adding new cast pathways. Too many
>>implicit casts and you have no type system at all. But in 7.3 there
>>should be no reason to object to an explicit-only cast from numeric
>>to text or vice versa.
>
>
> I'd suggest making the explicit cast of numeric to text be the exact
> equivalent of:
>
> SELECT btrim(to_char(numeric, '999,999,999,999.9999999999'))
> or similar.
>
In this vain, is there someplace in the docs that has a type conversion
table (matrix) that shows what datatype can be cast into what other
datatype (both implicitly and explicitly)? I haven't seen one and it
would be helpful for us newbies.
Thanks!
Kevin
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: datatype matrix (was: Re: Sorry..)
@ 2002-07-16 22:34 Josh Berkus <josh@agliodbs.com>
parent: Kevin Brannen <kevinb@nurseamerica.net>
1 sibling, 0 replies; 3+ messages in thread
From: Josh Berkus @ 2002-07-16 22:34 UTC (permalink / raw)
To: Kevin Brannen <kevinb@nurseamerica.net>; pgsql-sql
Kevin,
> In this vain, is there someplace in the docs that has a type conversion
> table (matrix) that shows what datatype can be cast into what other
> datatype (both implicitly and explicitly)? I haven't seen one and it
> would be helpful for us newbies.
I don't think it exists. Hey, how about a volunteer to write one?
--
-Josh Berkus
Aglio Database Solutions
San Francisco
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: datatype matrix (was: Re: Sorry..)
@ 2002-07-17 08:27 Karel Zak <zakkr@zf.jcu.cz>
parent: Kevin Brannen <kevinb@nurseamerica.net>
1 sibling, 0 replies; 3+ messages in thread
From: Karel Zak @ 2002-07-17 08:27 UTC (permalink / raw)
To: Kevin Brannen <kevinb@nurseamerica.net>; +Cc: pgsql-sql
On Tue, Jul 16, 2002 at 12:37:04PM -0500, Kevin Brannen wrote:
> Josh Berkus wrote:
> > Christopher,
> >
> >
> >>In the bad old days when we couldn't distinguish explicit from implicit
> >>cast functions, I was wary of adding new cast pathways. Too many
> >>implicit casts and you have no type system at all. But in 7.3 there
> >>should be no reason to object to an explicit-only cast from numeric
> >>to text or vice versa.
> >
> >
> > I'd suggest making the explicit cast of numeric to text be the exact
> > equivalent of:
> >
> > SELECT btrim(to_char(numeric, '999,999,999,999.9999999999'))
> > or similar.
Note: the btrim() call is needless. You can use Fill-Mode:
SELECT to_char(numeric, 'FM999,999,999,999.9999999999');
^^^
It's in docs :-)
Karel
--
Karel Zak <zakkr@zf.jcu.cz>
http://home.zf.jcu.cz/~zakkr/
C, PostgreSQL, PHP, WWW, http://docs.linux.cz, http://mape.jcu.cz
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2002-07-16 17:37 datatype matrix (was: Re: Sorry..) Kevin Brannen <kevinb@nurseamerica.net>
2002-07-16 22:34 ` Josh Berkus <josh@agliodbs.com>
2002-07-17 08:27 ` Karel Zak <zakkr@zf.jcu.cz>
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