writeDisposition property
Specifies the action that occurs if the destination table or partition already exists.
The following values are supported: * WRITE_TRUNCATE: If the table or partition already exists, BigQuery overwrites the entire table or all the partitions data. * WRITE_APPEND: If the table or partition already exists, BigQuery appends the data to the table or the latest partition. * WRITE_EMPTY: If the table already exists and contains data, an error is returned. The default value is WRITE_APPEND. Each action is atomic and only occurs if BigQuery is able to complete the job successfully. Details are at https://cloud.google.com/bigquery/docs/loading-data-local#appending_to_or_overwriting_a_table_using_a_local_file.
Optional.
Implementation
core.String? writeDisposition;