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Release 0.126

presto-docs/src/main/sphinx/release/release-0.126.rst

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============= Release 0.126

General Changes

  • Add error location information (line and column number) for semantic errors.
  • Fix a CLI crash during tab-completion when no schema is currently selected.
  • Fix reset of session properties in CLI when running :doc:/sql/use.
  • Fix occasional query planning failure due to a bug in the projection push down optimizer.
  • Fix a parsing issue when expressions contain the form POSITION(x in (y)).
  • Add a new version of :func:!approx_percentile that takes an accuracy parameter.
  • Allow specifying columns names in :doc:/sql/insert queries.
  • Add field_length table property to blackhole connector to control the size of generated VARCHAR and VARBINARY fields.
  • Bundle Teradata functions plugin in server package.
  • Improve handling of physical properties which can increase performance for queries involving window functions.
  • Add ability to control whether index join lookups and caching are shared within a task. This allows us to optimize for index cache hits or for more CPU parallelism. This option is toggled by the task.share-index-loading config property or the task_share_index_loading session property.
  • Add :doc:Tableau web connector </clients/tableau>.
  • Improve performance of queries that use an IN expression with a large list of constant values.
  • Enable connector predicate push down for all comparable and equatable types.
  • Fix query planning failure when using certain operations such as GROUP BY, DISTINCT, etc. on the output columns of UNNEST.
  • In ExchangeClient set maxResponseSize to be slightly smaller than the configured value. This reduces the possibility of encountering PageTooLargeException.
  • Fix memory leak in coordinator.
  • Add validation for names of table properties.

Hive Changes

  • Fix reading structural types containing nulls in Parquet.
  • Fix writing DATE type when timezone offset is negative. Previous versions would write the wrong date (off by one day).
  • Fix an issue where VARCHAR columns added to an existing table could not be queried.
  • Fix over-creation of initial splits.
  • Fix hive.immutable-partitions config property to also apply to unpartitioned tables.
  • Allow non-VARCHAR columns in DELETE query.
  • Support DATE columns as partition columns in parquet tables.
  • Improve error message for cases where partition columns are also table columns.