lijc210 edited a comment on issue #15892:
URL: https://github.com/apache/superset/issues/15892#issuecomment-886506222


   superset==1.2.0
   clickhouse-sqlalchemy  0.1.6
   
   clickhouse://ck_readonly:[email protected]:8123/ads?secure=true
   
   If the data from SQL query contains NULL, an error will be reported
   
![微信截图_20210726165241](https://user-images.githubusercontent.com/10651081/126962083-56d75e91-4fb8-4ea2-aede-e1c69ac61d09.png)
   
   2021-07-26 
16:51:49,314:DEBUG:urllib3.connectionpool:http://114.116.224.81:8123 "POST 
/?query_id=300ae6b2-a582-4280-be3b-8f37cd1f9cea&database=ads HTTP/1.1" 200 None
   Query 8: <class 'AttributeError'>
   2021-07-26 16:51:49,314:ERROR:superset.sql_lab:Query 8: <class 
'AttributeError'>
   clickhouse error: 'NoneType' object has no attribute 'startswith'
   2021-07-26 16:51:49,331:WARNING:superset.views.base:clickhouse error: 
'NoneType' object has no attribute 'startswith'
   
   The above is the error report log. I can't locate the line where the error 
is reported. Can you tell me how to print the call chain related to the error 
report,I want to fix this bug quickly
   
   In addition, the page does not display the correct field name, and the first 
row of data will be used as the field name
   
   
![微信图片_20210726170029111](https://user-images.githubusercontent.com/10651081/126963049-46f98f21-1c99-4f50-88ec-5aaafc27aa2b.png)
   
   
   
   
   


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