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#1 (**permalink**) 05-07-2008, 10:18 AM

While writing a date validation function, I'm not sure which condition
to check for in the following exception handler.

CREATE OR REPLACE FUNCTION IsValidDateTime(timestamp with time zone)
RETURNS BOOLEAN AS $$

BEGIN

PERFORM CAST($1 AS TIMESTAMP WITH TIME ZONE);

RETURN TRUE;

EXCEPTION WHEN INVALID_DATETIME_FORMAT THEN

RETURN FALSE;

END

$$ LANGUAGE 'plpgsql';

If I call it this way: SELECT IsValidDateTime('2008-05-06 00:00:95');

I would expect it to return FALSE but it returns:

ERROR: date/time field value out of range: "2008-05-06 00:00:95"

Is there either a specific error code to use or is there a generic catch
all code? I didn't see anything better listed at
http://www.postgresql.org/docs/8.0/s...-appendix.html

Thanks.

#2 (**permalink**) 05-07-2008, 10:18 AM

"Wright, George" <George.Wright@infimatic.com> writes:
> I would expect it to return FALSE but it returns:
> ERROR: date/time field value out of range: "2008-05-06 00:00:95"
> Is there either a specific error code to use or is there a generic catch
> all code? I didn't see anything better listed at
> http://www.postgresql.org/docs/8.0/s...-appendix.html

Well, the way to debug this sort of thing is to look at the error code
number. In psql you do it like this:

regression=# \set VERBOSITY verbose
regression=# select '2008-05-06 00:00:95'::timestamptz;
ERROR: 22008: date/time field value out of range: "2008-05-06 00:00:95"
LOCATION: DateTimeParseError, datetime.c:3112

and then a search in the appendix for 22008 finds

22008 DATETIME FIELD OVERFLOW

regards, tom lane

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#3 (**permalink**) 05-07-2008, 10:18 AM

Perfect! Thank you.

-----Original Message-----
From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
Sent: Tuesday, May 06, 2008 10:45 AM
To: Wright, George
Cc: pgsql-novice@postgresql.org
Subject: Re: [NOVICE] function exception

"Wright, George" <George.Wright@infimatic.com> writes:
> I would expect it to return FALSE but it returns:
> ERROR: date/time field value out of range: "2008-05-06 00:00:95"
> Is there either a specific error code to use or is there a generic
catch
> all code? I didn't see anything better listed at
> http://www.postgresql.org/docs/8.0/s...-appendix.html

Well, the way to debug this sort of thing is to look at the error code
number. In psql you do it like this:

regression=# \set VERBOSITY verbose
regression=# select '2008-05-06 00:00:95'::timestamptz;
ERROR: 22008: date/time field value out of range: "2008-05-06 00:00:95"
LOCATION: DateTimeParseError, datetime.c:3112

and then a search in the appendix for 22008 finds

22008 DATETIME FIELD OVERFLOW

regards, tom lane

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To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-novice

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