SPUG: while question
Adrian Hands
AEH at akc.org
Tue Sep 16 13:25:21 CDT 2003
The real problem here is fetchrow() returns a list and you're assigning it to a scalar.
Simply add some parens and your while loop will no longer incorrectly break on zero.
I.e.:
while ( ( $MyData ) = $sth->fetchrow() )
Peter Darley wrote:
> Folks,
> I have yet another stupid question:
>
> I regularly get data out of a DBI statement handle by doing:
>
> while ($MyData = $sth->fetchrow())
> {
> stuff
> }
>
> This falls down when the data returned from the statement is '0', since
> it's not true, and the while breaks. I've tried while (defined $MyData =
> $sth->fetchrow()), but this is not syntacticly correct, and would break on a
> database NULL (which is undef in perl) anway. I can do something like while
> ($MyRef = $sth->fetchrow_hashref()) {$MyData = $$MyRef{datapoint}; stuff},
> but I'm not too fond of that. Does anyone have a suggestion on a better way
> to construct this loop?
>
> Thanks,
> Peter Darley
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