Drill 1.14.0-1901 (MEP 6.0.1) Release Notes

This section provides reference information for fixes in Drill 1.14.0-1901.

The following release notes apply to the 1.14.0-1901 version of the Drill component:

Version 1.14.0-1901
Release Date February 2019
MapR Version Interoperability See Component Versions for Released MEPs.
Package Names
Navigate to https://package.mapr.com/releases/MEP/, and select your MEP and OS to view the list of package names, for example:
  • mapr-drill-1.14.0.201901161034-1.noarch.rpm
  • mapr-drill-internal-1.14.0.201901161034-1.noarch.rpm
  • mapr-drill-yarn-1.14.0.201901161034-1.noarch.rpm

Fixes

Drill 1.14.0-1901 provides the following fixes:

Fix Tracking Number Description
MD-5379 DRILL-7018: Fixed Parquet buffer overflow when reading timestamp column.
MD-5272 DRILL-6969: Drill no longer returns inconsistent results when reading MapR Database JSON tables using hive plugin when the native reader is enabled.
MD-5257 DRILL-6942: Sort query profiles by duration in the Drill Web UI under Profiles tab.
MD-5062 DRILL-6664: Drill returns the same results for queries on the same column of a Parquet table with the same predicate.
MD-5019 DRILL-6797: Drill aggregation queries that use custom UDF to split column data in a Parquet file no longer fail with a compilation error if the filter criteria results in no rows.
MD-5014 DRILL-6776: The Drill Web UI page source no longer has links to external sites.
MD-5008

Drill can leverage indexes for queries with ORDER BY DESC on indexed columns; for example, if a secondary index is defined on column a, Drill leverages the index for the query:

SELECT a FROM t ORDER BY a DESC;

MD-5002 DRILL-6764: Queries no longer fail with IndexOutOfBoundsException when UNNEST references a deep nested field, like t.c_orders.o_lineitems.
MD-5001

DRILL-6766: Queries with LATERAL UNNEST no longer return the following system error when one batch of streaming aggregates is split across multiple output batches:

IllegalStateException: Unexpected case where rowId [] in right batch of lateral is smaller than rowId [] in left batch being processed.

MD-4938 The option planner.index.covering_selectivity_threshold takes effect in execution plan when set to values < 1.0 for complex data.
MD-4936 DRILL-6773: Queries, with column aliases, that returned inconsistent results after a Drill patch was applied no longer return inconsistent results.
MD-4902 Complex secondary index plans are parallelized when queries have AND conditions.
MD-4851 Drill queries on MapRDB JSON tables no longer fail on schema change when the only distinct values are null and text.
MD-4780 DRILL-6746: Queries no longer hang when one of the nodes encounters a connection error.

Known Issues and Limitations

None.