orc-parquet-supported-types.md

Vertica can natively read columns of all Hive primitive data types. For a complete list, see HIVE Data Types (specifically the Numeric, Date/Time, String, and Misc lists). Vertica can also load UUIDs and complex types (arrays and structs in any combination).

The data types you specify for COPY or CREATE EXTERNAL TABLE AS COPY must exactly match the types in the data, though Vertica permits implicit casting among compatible numeric types.