DRILL-584: Prevent second level of implicit casts to be added in ExpressionTreeMaterializer
DRILL-1882: Add cast function from Varbinary to date/time/timestamp

Add bit comparison function
DRILL-1883: Fix output type of date, interval arithmetic functions
DRILL-1884: Fix type cast rules to cast varbinary to timestamp
DRILL-1779 Added functionality for unix_timestamp() similar to MySQL
DRILL-1869: CPP client - Handle nullable varchar columns with all nulls (fixed slicedByteBuf to handle zero length buffers). Also handle case where server sends a record batch where vector value counts  are zero.
DRILL-1848 Unsupported operation exception
DRILL-1849: Make parquet readers return nullable int instead of nullable bit for unknown columns.
DRILL-1871: Compressed JSON read support.
DRILL-1886: Project on subquery containing a union all causes NPE