GaryLiuTelus commented on issue #32870:
URL: https://github.com/apache/airflow/issues/32870#issuecomment-1665788565

   @rohan472000 
   As you can see from below, with the `BigQueryValueCheckOperator`, I need to 
run a query against the target table to get some information (the total records 
in below case), and then compare with the target number. If the target table is 
in a different project, I need the impersonation chain to get the result back. 
   
   ```python
   tbl_check = BigQueryValueCheckOperator(
           task_id="value_check",
           sql=f"select count(1) from `{project_id}.{DATASET}.{TABLE_NAME}`",
           pass_value=1_000_000,
           tolerance=0.05,
           use_legacy_sql=False,
           # project_id=project_id,
           location=location,
           impersonation_chain=[service_email]
       )
   ```


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