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warn "this_var=$this_var; that_var=$that_var\n";

sub lastRowNum
{
...
    my ( $rowcount ) = $dbh->selectrow_array( "select count(*) from $t
+able" );
    return $rowcount;
}

sub lastRowNum
{
...
    my ( $last_id ) = $dbh->selectrow_array( "select max($key_fld) fro
+m $table" );
    return $last_id;
}