Hi David:
I am assuming you are using DBI.
I am not quite sure what you are asking, but here is some code that might
help:
while ($hashref = $sth->fetchrow_hashref) #while there are records in the
query ...
{
DO SOME STUFF
}
The above code is a pretty traditonal way to deal with a statement handle
from DBI.
If you want to test if a query result is simply empty or not, you could do
something like the following:
if ($hashref = $sth->fetchrow_hashref) #then the query did not return an
empty set
{
DO SOME STUFF
}
This code will tell you if a statement handles has any records.
I am not sure if this is what you are looking for, perhaps you could provide
some more detail about what you are trying to do.
Good luck,
Matt
Matthew P Baranowski
Data Manager, Office of Educational Assessment
University of Washington
----- Original Message -----
From: David Wu <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, December 05, 2002 2:59 PM
Subject: mysql NULl value in perl problem
> Hi guys,
>
> Running into a frustrating problem. When I have a empty table in mysql
> database, i tried run a select statement in my perl script and
> supposing get a NULl return value. Is the NULL returned from mysql is
> described as string in perl or as undef in perl?.. As there is no the
> word NULL in perl
> Thank you very much guys
>
>
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