EugeneYushin commented on code in PR #45610:
URL: https://github.com/apache/airflow/pull/45610#discussion_r1918462144


##########
providers/src/airflow/providers/google/cloud/operators/bigquery.py:
##########
@@ -1717,12 +1717,14 @@ def execute(self, context: Context) -> None:
                 "tableId": table_id,
             },
             "labels": self.labels,
-            "schema": {"fields": schema_fields},
             "externalDataConfiguration": external_data_configuration,
             "location": self.location,
             "encryptionConfiguration": self.encryption_configuration,
         }
 
+        if self.schema_fields:

Review Comment:
   @VladaZakharova I'm using the following DAG for e2e tests locally:
   ```python
   bq_op = BigQueryCreateExternalTableOperator(
           gcp_conn_id="gcp_pp",
           task_id="bq_op",
           bucket=GCS_BUCKET,
           source_objects=["test.csv"],
           
destination_project_dataset_table=f"{PROJECT_ID}.user_eyushin.airflow_test_orig",
           # 
destination_project_dataset_table=f"{PROJECT_ID}.user_eyushin.airflow_test_new",
           source_format="CSV",
           autodetect=True,
           skip_leading_rows=1,
           location="us-east4",
       )
   ```
   
   Original behavior:
   <img width="747" alt="image" 
src="https://github.com/user-attachments/assets/0b3136bd-df99-4ce4-9000-783af326de24";
 />
   <img width="637" alt="Screenshot 2025-01-16 at 15 48 03" 
src="https://github.com/user-attachments/assets/5199bdd8-1026-4cc0-9218-7e5cbb46856b";
 />
   
   Adjusted behavior:
   <img width="847" alt="image" 
src="https://github.com/user-attachments/assets/ac3db8e0-6a6f-4d1a-8080-85e1fa7a0aab";
 />
   <img width="727" alt="Screenshot 2025-01-16 at 15 49 11" 
src="https://github.com/user-attachments/assets/d7385ccf-ed56-4c37-b34f-4d66f99209b5";
 />
   
   <img width="1035" alt="image" 
src="https://github.com/user-attachments/assets/864147bc-42b3-4b05-a606-fd4d5318494c";
 />
   
   In the other words, sending empty schema to GCP focres BQ to bypass 
autodetect mechanics.
   You can also check https://github.com/apache/airflow/issues/45512 for some 
context about the issue.
   I'll be happy to iterate on that if you have other questions.



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