[GitHub] xqliu opened a new issue #5277: Is there any specific reason why we have datasource_name in columns, metrics and tables team rather than database id?

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xqliu opened a new issue #5277: Is there any specific reason why we have datasource_name in columns, metrics and tables team rather than database id?
URL: https://github.com/apache/incubator-superset/issues/5277
 
 
   Dears,
   
   I would like to know that, 
   
   Is there any specific reason why we have datasource_name in columns, metrics and tables team rather than database id? 
   
   A search gives me this and explained the reason why it's in tables, but what about columns and metrics?
   
   Will it be an optimisation to the table structure if we change it to a reference to database id?
   
   Updating permission when refreshing druid datasource #2655
   
   

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