Cannot set destination table with BigQuery Python API

问题

I'm recently getting the following BigQuery error when using the Python API:

google.api_core.exceptions.BadRequest: 400 configuration.query.destinationTable cannot be set for scripts

This is the function I use:

def execute_bigquery_sql(query, dataset_id, table_id, use_legacy_sql=True, write_disposition='WRITE_TRUNCATE'):
    client = bigquery.Client()
    job_config = bigquery.QueryJobConfig()
    job_config.use_legacy_sql = use_legacy_sql

    print("table_id: {table_id}".format(table_id=table_id))
    print("dataset_id: {dataset_id}".format(dataset_id=dataset_id))

    if table_id:
        table_ref = client.dataset(dataset_id).table(table_id)
        print("table_ref: {table_ref}".format(table_ref=table_ref))
        job_config.destination = table_ref
        job_config.write_disposition = write_disposition
        job_config.allow_large_results = True
        job_config.createDisposition = "CREATE_IF_NEEDED"

    query_job = client.query(query,job_config=job_config)
    results = query_job.result()  # Waits for job to complete.

Does anyone knows what might be happening and a workaround?

回答1:

error is self-descriptive. scripts do not allow destination table to be set - instead you should use DML/DDL

workaround is to reset job_config with no destination table in it

回答2:

Thanks for the responses, comments were indeed in the right direction. In BigQuery scripting means https://cloud.google.com/bigquery/docs/reference/standard-sql/scripting.

And that is what is not allowed, and my query had:

DECLARE capital int64 default 10000000;

So, removing the line above was the fix in my case.

Interesting thing is that even in the web interface

If you use scripts the interface won't allow to save to table:

In contrast, when not using script statements, you should see:

来源：https://stackoverflow.com/questions/58646725/cannot-set-destination-table-with-bigquery-python-api

标签

google-bigquery