-- | A string that identifies one or more attributes to retrieve from the
-- table. These attributes can include scalars, sets, or elements of a JSON
-- document. The attributes in the expression must be separated by commas.
--
-- If no attribute names are specified, then all attributes will be
-- returned. If any of the requested attributes are not found, they will
-- not appear in the result.
--
-- For more information, see
-- <http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html Accessing Item Attributes>
-- in the /Amazon DynamoDB Developer Guide/.
--
-- /ProjectionExpression/ replaces the legacy /AttributesToGet/ parameter.
qProjectionExpression :: Lens' Query (Maybe Text)
qProjectionExpression = lens _qProjectionExpression (\ s a -> s{_qProjectionExpression = a})
qProjectionExpression :: Lens' Query (Maybe Text)
qProjectionExpression = lens _qProjectionExpression (\ s a -> s{_qProjectionExpression = a})
qProjectionExpression = lens _qProjectionExpression (\ s a -> s{_qProjectionExpression = a})