12.3. Release 327 (20 Dec 2019)

General Changes

Fix join query failure when late materialization is enabled. (#2144)
Fix failure of word_stem() for certain inputs. (#2145)
Fix query failure when using transform_values() inside try() and the transformation fails for one of the rows. (#2315)
Fix potential incorrect results for aggregations involving FILTER (WHERE ...) when the condition is a reference to a table column. (#2267)
Allow renaming views with ALTER VIEW. (#1060)
Add error_type and error_code columns to system.runtime.queries. (#2249)
Rename experimental.work-processor-pipelines configuration property to experimental.late-materialization.enabled and rename work_processor_pipelines session property to late_materialization. (#2275)

Fix incorrect query results when reading timestamp values from ORC files written by Hive 3.1 or later. (#2099)
Fix a CDH 5.x metastore compatibility issue resulting in failure when analyzing or inserting into a table with date columns. (#556)
Reduce number of metastore calls when fetching partitions. (#1921)
Support reading from insert-only transactional tables. (#576)
Deprecate parquet.fail-on-corrupted-statistics (previously known as hive.parquet.fail-on-corrupted-statistics). Setting this configuration property to false may hide correctness issues, leading to incorrect query results. Session property parquet_fail_with_corrupted_statistics is deprecated as well. Both configuration and session properties will be removed in a future version. (#2129)
Improve concurrency when updating table or partition statistics. (#2154)
Add support for renaming views. (#2189)
Allow configuring the hive.orc.use-column-names config property on a per-session basis using the orc_use_column_names session property. (#2248)

Support predicate pushdown for the decimal type. (#2131)
Fix column position swap for delete operations that may result in deletion of the wrong records. (#2252)
Improve predicate pushdown for queries that match a column against multiple values (typically using the IN operator). (#2253)

Allow converting unsupported types to VARCHAR by setting the session property unsupported_type_handling or configuration property unsupported-type-handling to CONVERT_TO_VARCHAR. (#1182)

Improve performance for queries involving equality and range filters over table columns. (#2310)