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.IX Title "Class::DBI::Iterator 3pm"
.TH Class::DBI::Iterator 3pm "2020-12-28" "perl v5.32.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Class::DBI::Iterator \- Iterate over Class::DBI search results
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&        my $it = My::Class\->search(foo => \*(Aqbar\*(Aq);
\&
\&        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;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
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.
.PP
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.
.SH "CAVEAT"
.IX Header "CAVEAT"
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.