13.20. Release 0.232

    There is a bug in this release that will cause queries with the predicate on bucketed columns to produce incorrect results.

    • Fix an issue where DATE_TRUNC may produce incorrect results at certain timestamp in America/Sao_Paulo.
    • Improve built-in function resolution performance by caching function resolution results.
    • Add a MySQL-based function namespace manager implementation that supports creating, altering, and dropping SQL functions (Function Namespace Managers).
    • Add configuration property use-legacy-scheduler and session property use_legacy_scheduler to use a version of the query scheduler before refactorings to enable full stage retries. The default value is false. This is a temporary property to provide an easy way to roll back in case of bugs in the new scheduler. This property will be removed in a couple releases once we have confidence in the stability of the new scheduler.
    • Add query_max_total_memory_per_node and query_max_memory_per_node session properties.
    • Add support to show whether functions have variable arity in SHOW FUNCTIONS.
    • Add support to show whether functions are built-in in SHOW FUNCTIONS.
    • Add use_exact_partitioning session property that forces repartitioning if repartitioning is possible.
    • Add support for .
    • Add configuration property resource-groups.reload-refresh-interval to control the frequency of reloading resource group information from the database. The default value is 10 seconds.
    • Add support for using the Thrift protocol to shuffle data. This can be configured using the configuration property internal-communication.task-communication-protocol. Possible values are HTTP or Thrift.
    • Add support for using the Thrift protocol to announce node state. This can be configured using the configuration property internal-communication.server-info-communication-protocol. Possible values are HTTP or Thrift.
    • Add session property list_built_in_functions_only to support hiding user-defined SQL functions in SHOW FUNCTIONS.

    Hive Changes

    • Fix an issue where queries could fail with buffer overflow when writing ORC files.
    • Add support for handling statistics to the Alluxio metastore.
    • Add Alluxio metastore which connects to the Alluxio catalog service [https://docs.alluxio.io/os/user/2.1/en/core-services/Catalog.html](https://docs.alluxio.io/os/user/2.1/en/core-services/Catalog.html)\.
    • Add session property shuffle_partitioned_columns_for_table_write to make Presto shuffle data on the partition columns before writing to partitioned unbucketed Hive tables. This increases the maximum number of partitions that can be written in a single query by a factor of the total number of writing workers. The property is false by default. ().
    • Expose Hive table properties via system table$properties table.
    • Change error code from HIVE_METASTORE_ERROR to HIVE_TABLE_DROPPED_DURING_QUERY when a DROP TABLE query fails due to another query dropping the table before this query has finished.
    • Upgrade Alluxio version from 2.1.1 to 2.1.2.
    • Add Kerberos authentication.

    Kafka Changes

    • Update Kafka connector to 2.3.1, which improves implementation and performance ().
    • Replace config pinot.prefer-broker-queries with the inverse config pinot.forbid-broker-queries.

    Verifier Changes

    • Replace IsHidden attribute on AggregationFunction and ScalarFunction with visibility which can be of the following values PUBLIC, , HIDDEN.