Class::DBI::Iterator - Iterate over Class::DBI search results
my $it = My::Class->search(foo => 'bar');
my $results = $it->count;
my $first_result = $it->first;
while ($it->next) { ... }
my @slice = $it->slice(10,19);
my $slice = $it->slice(10,19);
$it->reset;
$it->delete_all;
Any Class::DBI search (including a has_many method) which returns multiple
objects can be made to return an iterator instead simply by executing the
search in scalar context.
Then, rather than having to fetch all the results at the same time, you can
fetch them one at a time, potentially saving a considerable amount of
processing time and memory.
Note that there is no provision for the data changing (or even being deleted) in
the database inbetween performing the search and retrieving the next
result.