使用自定义分区从GCS上传到bigquery

Question

我正尝试使用GoogleCloudStorageToBigQueryOperator将GCS存储桶中的数据上传到bigquery，如下所示，但是分区列（状态）填充为null。有什么想法吗？

gcs_to_bigquery = GoogleCloudStorageToBigQueryOperator(
task_id='gcs_to_bigquery',
bucket=gcs_bucket,
source_objects=[
    'parquet/sample_data/*'
],
destination_project_dataset_table='projectxxxxx.{}.sample_data'.format(schema),
source_format='PARQUET',
schema_fields=[{"name": "id", "type": "INTEGER", "mode": "NULLABLE"},
               {"name": "col1", "type": "STRING", "mode": "NULLABLE"},
               {"name": "col2", "type": "STRING", "mode": "NULLABLE"},
               {"name": "col3", "type": "STRING", "mode": "NULLABLE"},
               {"name": "col4", "type": "STRING", "mode": "NULLABLE"},
               {"name": "col5", "type": "STRING", "mode": "NULLABLE"},

               {"name": "state", "type": "STRING", "mode": "NULLABLE"}],
create_disposition='CREATE_IF_NEEDED',
write_disposition='WRITE_TRUNCATE',
dag=dag

）