DirectLoadTableDedupTruncateStreamLoader
constructor(stream: DestinationStream, initialStatus: DirectLoadInitialStatus, realTableName: TableName, tempTableName: TableName, columnNameMapping: ColumnNameMapping, nativeTableOperations: DirectLoadTableNativeOperations, sqlTableOperations: DirectLoadTableSqlOperations, streamStateStore: StreamStateStore<DirectLoadTableExecutionConfig>, tempTableNameGenerator: TempTableNameGenerator)