ITERTORS

When working with a lot of rows there are a few iterators that help avoiding memory usage issues.

• Kwf_Model_Iterator_Rows: iterate over rows, basically the same as getRows()
• Kwf_Model_Iterator_ExportArray: iterate over export data, basically the same as export()
• Kwf_Model_Iterator_Packages: Iterate in packages to avoid high memory usage

Example iterate Rows

$select = new Kwf_Model_Select();
$select->whereEquals('foo', '1');
$it = new Kwf_Model_Iterator_Packages(
    new Kwf_Model_Iterator_Rows($model, $select)
);
foreach ($it as $row) {
    echo $row->bar."\n";
}

Example iterate exported Array

$select = new Kwf_Model_Select();
$select->whereEquals('foo', '1');
$options = array(
    'columns' => array('id', 'bar'),
);
$it = new Kwf_Model_Iterator_Packages(
    new Kwf_Model_Iterator_ExportArray($model, $select, $options)
);
foreach ($it as $row) {
    echo $row['bar']."\n";
}

When executing this code on the command line you can also add a progress bar:

$it = new Kwf_Iterator_ConsoleProgressBar($it);