Add missing license header
Add ReadOnlyConnectorMetadata
Minor native metadata cleanups
Make native column IDs local to the table
Add missing binding for initial set
Allow explaining any type of statement
Fix task completion for partitioned drivers
Add class name to exception message
Distinguish between missing and empty files
Metadata changes for creating tables
Add checkType utility method
Fix missing notification in InMemoryExchange
Add CREATE TABLE AS SELECT for native tables
Use CTAS for loading data in distributed tests
Add class loader connector wrappers to SPI
Add null checks and fix warnings