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

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

9               my $it = My::Class->search(foo => 'bar');
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11               my $results = $it->count;
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13               my $first_result = $it->first;
14               while ($it->next) { ... }
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16               my @slice = $it->slice(10,19);
17               my $slice = $it->slice(10,19);
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19               $it->reset;
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21               $it->delete_all;
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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.
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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.
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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.
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39perl v5.30.1                      2020-01-29           Class::DBI::Iterator(3)