1Class::DBI::Iterator(3)User Contributed Perl DocumentatioCnlass::DBI::Iterator(3)
2
3
4

NAME

6       Class::DBI::Iterator - Iterate over Class::DBI search results
7

SYNOPSIS

9               my $it = My::Class->search(foo => 'bar');
10
11               my $results = $it->count;
12
13               my $first_result = $it->first;
14               while ($it->next) { ... }
15
16               my @slice = $it->slice(10,19);
17               my $slice = $it->slice(10,19);
18
19               $it->reset;
20
21               $it->delete_all;
22

DESCRIPTION

24       Any Class::DBI search (including a has_many method) which returns
25       multiple objects can be made to return an iterator instead simply by
26       executing the search in scalar context.
27
28       Then, rather than having to fetch all the results at the same time, you
29       can fetch them one at a time, potentially saving a considerable amount
30       of processing time and memory.
31

CAVEAT

33       Note that there is no provision for the data changing (or even being
34       deleted) in the database inbetween performing the search and retrieving
35       the next result.
36
37
38
39perl v5.34.0                      2021-07-22           Class::DBI::Iterator(3)
Impressum