13.73. Release 0.170

    • Fix a performance regression for GROUP BY queries over UNION.
    • Fix a performance regression that occurs when a significant number of exchange sources produce no data during an exchange (e.g., in a skewed hash join).

    Web UI Changes

    • Fix broken rendering when catalog properties are set.
    • Fix rendering of live plan when query is queued.
    • Add support for .

    Hive Changes

    • Improve decimal support for the Parquet reader.
    • Fix an intermittent connection issue for Cassandra 2.1.
    • Remove support for selecting by partition key when the partition key is only partially specified. The cassandra.limit-for-partition-key-select and cassandra.fetch-size-for-partition-key-select config options are no longer supported.
    • Remove partition key cache to improve consistency and reduce load on the Cassandra cluster due to background cache refresh.
    • Reduce the number of connections opened to the Cassandra cluster. Now Presto opens a single connection from each node.
    • Use exponential backoff for retries when Cassandra hosts are down. The retry timeout can be controlled via the config option, which has a default value of 1m. The cassandra.no-host-available-retry-count config option is no longer supported.

    Verifier Changes

    • Add support for queries.