ConstReadonlyAPPEND_ONLY: "APPEND_ONLY"Source data will be appended to destination table rather than merged in the absence of row key.
ReadonlySCD_TYPE_1: "SCD_TYPE_1"ReadonlySCD_TYPE_2: "SCD_TYPE_2"ReadonlySCD_TYPE_UNSPECIFIED: "SCD_TYPE_UNSPECIFIED"
The SCD type to use to ingest the table.