无法在BigQuery中使用DML语句的作业中设置目标表 [英] Cannot set destination table in jobs with DML statements in BigQuery

问题描述

我正在研究使用bigquery.Client.query执行BigQuery sql命令的Python代码.我收到无法在具有DML语句的作业中设置目标表.

I am working on Python code to execute BigQuery sql command using bigquery.Client.query. I am getting Cannot set destination table in jobs with DML statements exception.

下面是我正在使用的Python代码

Below is the Python code I am using

if query_file_name:
    with open(query_file_name, mode="r") as query_file:
        query = query_file.read()

job_config = bigquery.QueryJobConfig()
job_config.use_legacy_sql = use_legacy_sql

if destination:
    if destination.partitioned_field:
        job_config.time_partitioning = TimePartitioning(type_=TimePartitioningType.DAY, 
                                         field=destination.partitioned_field)
google_bq_table = self.fetch_table_reference(destination)
job_config.destination = google_bq_table

job_config.write_disposition = WriteDisposition.WRITE_APPEND

query_job = self.google_client.query(query, job_config=job_config)  # API request - starts the query asynchronously

我有如下BigQuery sql中的query_file

I have query_file as in below BigQuery sql

INSERT mydataset.target_table
        (col1, col2, col3, created_date)
WITH T AS (SELECT col1, col2, col3, CURRENT_DATE() as created_date
            from mydataset.temp_table
           )
SELECT col1, col2, col3, created_date FROM T

提前感谢您的帮助

谢谢

Raghunath.

Raghunath.

推荐答案

无法在具有DML语句的作业中设置目标表

Cannot set destination table in jobs with DML statements

作为BigQuery错误消息中的统计信息，您在运行插入命令时无法在python代码目标对象中进行设置.

As stat in BigQuery error message, you can't set in your python code destination object when running an insert command.

删除此行

if destination:
    if destination.partitioned_field:
        job_config.time_partitioning = TimePartitioning(type_=TimePartitioningType.DAY, 
                                         field=destination.partitioned_field)
google_bq_table = self.fetch_table_reference(destination)
job_config.destination = google_bq_table

通过您的代码可以解决您的问题

from your code will solve your problem

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