mapping schema is used to infer a schema from a given mapping. This way, the schema of outgoing relations can
be implicitly specified by referencing the mapping that will be written to the relation.
relations: output: kind: hiveTable database: "crm" table: "customers" format: parquet partitions: - name: landing_date type: string schema: kind: mapping mapping: customers
kind(mandatory) (type: string):
mapping(mandatory) (type: string): Specifies the name of mapping of which the schema should be used.