Bulk Operation

DRILL-6835 Implement ALTER SCHEMA ADD / REMOVE COLUMN / PROPERTY commands

DRILL-6835 After renaming MAP to STRUCT typeString method still outputs MAP name

DRILL-6835 Wrap SchemaParsingException into UserException when creating schema

DRILL-6835 Implement command to describe schema for table

DRILL-6835 Expose Tuple Metadata to the physical operator

DRILL-6835 Rename map to struct in schema definition

DRILL-6835 CREATE SCHEMA command / TupleSchema / ColumnMetadata improvements

DRILL-6835 Adjust table function usage for all storage plugins and implement schema parameter

DRILL-6835 Implement CREATE / DROP TABLE SCHEMA commands