google-bigquery - BigQuery : How to overwrite a table with bigquery. Client()。copy_table方法

Question

这是我用作https://cloud.google.com/bigquery/docs/managing-tables#bigquery-copy-table-python的引用的代码:

source_dataset = client.dataset('samples', project='bigquery-public-data')
source_table_ref = source_dataset.table('shakespeare')

# dataset_id = 'my_dataset'
dest_table_ref = client.dataset(dataset_id).table('destination_table')

job = client.copy_table(
    source_table_ref,
    dest_table_ref,
    # Location must match that of the source and destination tables.
    location='US')  # API request

job.result()  # Waits for job to complete.

在我的情况下，目标表存在，并且出现此错误:

Already Exists

如何使用此copy_table方法覆盖？在bq命令行中，我可以使用-f选项。所以我正在寻找相同的标志。

Answer 1

您需要像这样将作业配置传递给请求:

job_config = bigquery.CopyJobConfig()
job_config.write_disposition = "WRITE_TRUNCATE"
job = client.copy_table(
    source_table_ref,
    dest_table_ref,
    location='US',
    job_config=job_config)  # API request

此处有更多文档: https://googleapis.github.io/google-cloud-python/latest/bigquery/generated/google.cloud.bigquery.client.Client.copy_table.html