-- | A string that contains conditions that DynamoDB applies after the
-- /Query/ operation, but before the data is returned to you. Items that do
-- not satisfy the /FilterExpression/ criteria are not returned.
--
-- A /FilterExpression/ is applied after the items have already been read;
-- the process of filtering does not consume any additional read capacity
-- units.
--
-- For more information, see
-- <http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html#FilteringResults Filter Expressions>
-- in the /Amazon DynamoDB Developer Guide/.
--
-- /FilterExpression/ replaces the legacy /QueryFilter/ and
-- /ConditionalOperator/ parameters.
qFilterExpression :: Lens' Query (Maybe Text)
qFilterExpression = lens _qFilterExpression (\ s a -> s{_qFilterExpression = a})
qFilterExpression :: Lens' Query (Maybe Text)
qFilterExpression = lens _qFilterExpression (\ s a -> s{_qFilterExpression = a})
qFilterExpression = lens _qFilterExpression (\ s a -> s{_qFilterExpression = a})