empty relation is a dummy relation, which can be used either for creating empty
data (but with a schema) during read operations or for throwing away records in
relations: empty: kind: empty schema: kind: inline fields: - name: id type: string - name: amount type: double
schema(optional) (schema) (default: empty): Explicitly specifies the schema of the null relation.
description(optional) (string) (default: empty): A description of the relation. This is purely for informational purpose.
partitions(optional) (list:partition) (default: empty): Even though a
emptyrelation does not provide any physical storage, it still optionally provides virtual partition columns.
empty relation supports all output modes, each of them simply discarding all records.