DELTA_CANNOT_WRITE_EMPTY_SCHEMA error condition
The Delta table is not writable because parts of the schema are not supported. Reason:
STRUCT_ALL_VOID_FIELDS
The column <columnPath> is a struct where all fields have VOID type.
STRUCT_NO_FIELDS
The column <columnPath> is a struct with no fields.
TABLE_ALL_VOID_COLUMNS
All columns in the table schema have VOID type.
TABLE_NO_COLUMNS
The table schema has no columns defined.