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2021-01-27 21:42:26
13.65. Release 0.197
General Changes
- Fix query scheduling hang when the
concurrent_lifespans_per_task
session property is set. - Fix failure when a query contains a
TIMESTAMP
literal corresponding to a local time that does not occur in the default time zone of the Presto JVM. For example, if Presto was running in a CET zone (e.g., Europe/Brussels
) and the client session was in UTC, an expression such as TIMESTAMP '2017-03-26 02:10:00'
would cause a failure. - Extend predicate inference and pushdown for queries using a
<symbol> IN <subquery>
predicate. - Support predicate pushdown for the
<column> IN <values list>
predicate where values in the values list
require casting to match the type of column
. - Optimize
min()
and max()
to avoid unnecessary object creation in order to reduce GC overhead. - Optimize the performance of
ST_XMin()
, ST_XMax()
, ST_YMin()
, and ST_YMax()
. - Add
DATE
variant for sequence()
function. - Add
ST_IsSimple()
geospatial function. - Add support for broadcast spatial joins.
Resource Groups Changes
- Change configuration check for weights in resource group policy to validate that either all of the subgroups or none of the subgroups have a scheduling weight configured.
- Add support for named variables in source and user regular expressions that can be used to parameterize resource group names.
- Add support for optional fields in DB resource group exact match selectors.
Hive Changes
- Fix reading of Hive partition statistics with unset fields. Previously, unset fields were incorrectly interpreted as having a value of zero.
- Fix integer overflow when writing a single file greater than 2GB with optimized ORC writer.
- Fix system memory accounting to include stripe statistics size and writer validation size for the optimized ORC writer.
- Dynamically allocate the compression buffer for the optimized ORC writer to avoid unnecessary memory allocation. Add config property
hive.orc.writer.max-compression-buffer-size
to limit the maximum size of the buffer. - Add session property
orc_optimized_writer_max_stripe_size
to tune the maximum stipe size for the optimized ORC writer. - Add session property
orc_string_statistics_limit
to drop the string statistics when writing ORC files if they exceed the limit. - Use the view owner returned from the metastore at the time of the query rather than always using the user who created the view. This allows changing the owner of a view.
CLI Changes
- Fix hang when CLI fails to communicate with Presto server.
SPI Changes
- Include connector session properties for the connector metadata calls made when running
SHOW
statements or querying information_schema
. - Add count and time of full GC that occurred while query was running to
QueryCompletedEvent
. - Change the
ResourceGroupManager
interface to include a match()
method and remove the getSelectors()
method and the ResourceGroupSelector
interface. - Rename the existing
SelectionContext
class to be SelectionCriteria
and create a new SelectionContext
class that is returned from the match()
method and contains the resource group ID and a manager-defined context field. - Use the view owner from
ConnectorViewDefinition
when present.