Presto 0.141t Documentation

17.4. Release 0.140

17.4. Release 0.140

General Changes

  • Add the TRY function to handle specific data exceptions. See Conditional Expressions.
  • Optimize predicate expressions to minimize redundancies.
  • Add environment name to UI.
  • Fix logging of failure_host and failure_task fields in QueryCompletionEvent.
  • Fix race which can cause queries to fail with a REMOTE_TASK_ERROR.
  • Optimize array_distinct() for array<bigint>.
  • Optimize > operator for ARRAY.
  • Fix an optimization issue that could result in non-deterministic functions being evaluated more than once producing unexpected results.
  • Fix incorrect result for rare IN lists that contain certain combinations of non-constant expressions that are null and non-null.
  • Improve performance of joins, aggregations, etc. by removing unnecessarily duplicated columns.
  • Optimize NOT IN queries to produce more compact predicates.

Hive Changes

  • Remove bogus “from deserializer” column comments.
  • Change categorization of Hive writer errors to be more specific.
  • Add date and timestamp support to new Parquet Reader

SPI Changes

  • Remove partition key from ColumnMetadata.
  • Change return type of ConnectorTableLayout.getDiscretePredicates().


This is a backwards incompatible change with the previous connector SPI. If you have written a connector, you will need to update your code before deploying this release.