Generally the rows method is unreliable - here's a section from
'perldoc DBI':
rows
$rv = $sth-rows;
Returns the number of rows affected by the last row affecting
command, or -1 if the number of rows is not known or not
available.
Generally, you can only rely on a row count
Case:
When I used $query_a-fetchrow_array
I use it again in $query_a-rows to count number or rows.
However, when I used $query_a-fetchrow_arrayref
$query_a-rows returns nothing - it seems $query_a is nullified.
Is it normal or due to my other problem?
Thanks in advance!
Zhiliang
