$db public property The MongoDB connection to be used when performing

valid() public method Returns whether there is a valid

rewind() public method Resets the iterator to the initial

next() public method Moves the internal pointer to the

current() public method Returns the current dataset.

$batchSize public property The number of rows to be returned in

$query public property The query object associated with this batch

key() public method Returns the index of the current dataset

fetchData() protected method Fetches the next batch of

reset() public method Resets the batch query.