This release has a memory leak and should not be used.
Initial support for partition and placement awareness in the query planner. This can result in better plans for queries involving
GROUP BYover the same key columns.
Improve planning of UNION queries.
Add presto version to query creation and completion events.
task.writer-countto configure the number of writers per task.
Fix a bug when optimizing constant expressions involving binary types.
Fix bug where a table writer commits partial results while cleaning up a failed query.
Fix a bug when unnesting an array of doubles containing NaN or Infinity.
Fix failure when accessing elements in an empty array.
Fix “Remote page is too large” errors.
Improve error message when attempting to cast a value to
approx_distinct()documentation with correct standard error bounds.
Disable falling back to the interpreter when expressions fail to be compiled to bytecode. To enable this option, add
compiler.interpreter-enabled=trueto the coordinator and worker config properties. Enabling this option will allow certain queries to run slowly rather than failing.
Improve JDBC Driver conformance. In particular, all unimplemented methods now throw
Functions and Language Features#
Add support for casting
Add support for unparenthesized expressions in
Improve formatting of
EXPLAIN (TYPE DISTRIBUTED)output and include additional information such as output layout, task placement policy and partitioning functions.
Disable optimized metastore partition fetching for non-string partition keys. This fixes an issue were Presto might silently ignore data with non-canonical partition values. To enable this option, add
hive.assume-canonical-partition-keys=trueto the coordinator and worker config properties.
Don’t retry operations against S3 that fail due to lack of permissions.
Slicefor table writer fragments.
ConnectorPageSinkwhich is a more efficient interface for column-oriented sources.
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.