============ Release 0.77 ============ Parametric Types ---------------- Presto now has a framework for implementing parametric types and functions. Support for :ref:`array_type` and :ref:`map_type` types has been added, including the element accessor operator ``[]``, and new :doc:`/functions/array`. Streaming Index Joins --------------------- Index joins will now switch to use a key-by-key streaming join if index results fail to fit in the allocated index memory space. Distributed Joins ----------------- Joins where both tables are distributed are now supported. This allows larger tables to be joined, and can be enabled with the ``distributed-joins-enabled`` flag. It may perform worse than the existing broadcast join implementation because it requires redistributing both tables. This feature is still experimental, and should be used with caution. Hive Changes ------------ * Handle spurious ``AbortedException`` when closing S3 input streams * Add support for ORC, DWRF and Parquet in Hive * Add support for ``DATE`` type in Hive * Fix performance regression in Hive when reading ``VARCHAR`` columns Kafka Changes ------------- * Fix Kafka handling of default port * Add support for Kafka messages with a null key General Changes --------------- * Fix race condition in scheduler that could cause queries to hang * Add ConnectorPageSource which is a more efficient interface for column-oriented sources * Add support for string partition keys in Cassandra * Add support for variable arity functions * Add support for :func:`count` for all types * Fix bug in HashAggregation that could cause the operator to go in an infinite loop