While loop in perl with fetch row in it

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PERL

my $dbHit= $DB->prepare($db_statement);
	$dbHit->execute();
	my $isHoliday = 'f';
	while (my @key=$dbHit->fetchrow()){	
		my $account			= padZero($key[0],9);
		my $tdate			= $key[1];
		my $code			= $key[3];
		my $item			= $key[2];
		my $default			= 'CMB';
}

The problem is I'm executing a query which return zero rows. We are using while with dbhit values in it. What will happen. Will the while loop execute or not.

Posted 27-Jun-12 9:21am

Ashokraj29

Updated 27-Jun-12 9:33am

Tim Corey

v2

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Uilleam · Answer 1 · 2012-06-29T17:08:00

Well how hard would it be to just try it?

Another way to look at it is: how would returning zero rows be different to fetchrow() than the second iteration if there was only one row returned? Either way you get an empty list and the while ends (which is the point of this structure). So, if you have no row, you get no iteration.

Still, you should try it, run it in the debugger even. It may help you to better understand what's going on.

By the way, while DBI does have a deprecated fetchrow(), it would be better form to use fetchrow_array() in your while.

hope this helps!