Release 0.168#
General#
Fix correctness issues for certain
JOIN
queries that require implicit coercions for terms in the join criteria.Fix invalid “No more locations already set” error.
Fix invalid “No more buffers already set” error.
Temporarily revert empty join short-circuit optimization due to issue with hanging queries.
Improve performance of
DECIMAL
type and operators.Optimize window frame computation for empty frames.
json_extract()
andjson_extract_scalar()
now support escaping double quotes or backslashes using a backslash with a JSON path subscript. This changes the semantics of any invocation using a backslash, as backslashes were previously treated as normal characters.Improve performance of
filter()
andmap_filter()
lambda functions.Add Memory connector.
Add
arrays_overlap()
andarray_except()
functions.Allow concatenating more than two arrays with
concat()
or maps withmap_concat()
.Add a time limit for the iterative optimizer. It can be adjusted via the
iterative_optimizer_timeout
session property orexperimental.iterative-optimizer-timeout
configuration option.ROW
types are now orderable if all of the field types are orderable. This allows using them in comparison expressions,ORDER BY
and functions that require orderable types (e.g.,max()
).
JDBC driver#
Update
DatabaseMetaData
to reflect features that are now supported.Update advertised JDBC version to 4.2, which part of Java 8.
Return correct driver and server versions rather than
1.0
.
Hive#
Fix reading decimals for RCFile text format using non-optimized reader.
Fix bug which prevented the file based metastore from being used.
Enable optimized RCFile reader by default.
Common user errors are now correctly categorized.
Add new, experimental, RCFile writer optimized for Presto. The new writer can be enabled with the
rcfile_optimized_writer_enabled
session property or thehive.rcfile-optimized-writer.enabled
Hive catalog property.
Cassandra#
Add predicate pushdown for clustering key.
MongoDB#
Allow SSL connections using the
mongodb.ssl.enabled
config flag.
SPI#
ConnectorIndex now returns
ConnectorPageSource
instead ofRecordSet
. Existing connectors that support index join can use theRecordPageSource
to adapt to the new API.