yii\mongodb\Query::batch PHP Method

batch() public method

A batch query supports fetching data in batches, which can keep the memory usage under a limit. This method will return a BatchQueryResult object which implements the Iterator interface and can be traversed to retrieve the data in batches. For example, php $query = (new Query)->from('user'); foreach ($query->batch() as $rows) { $rows is an array of 10 or fewer rows from user collection }

public batch ( integer $batchSize = 100, Connection $db = null ) : BatchQueryResult
$batchSize	integer	the number of records to be fetched in each batch.
$db	Connection	the MongoDB connection. If not set, the "mongodb" application component will be used.
return	BatchQueryResult	the batch query result. It implements the `Iterator` interface and can be traversed to retrieve the data in batches.