cuglifangzheng commented on a change in pull request #2121:
URL: https://github.com/apache/calcite/pull/2121#discussion_r477084585



##########
File path: 
core/src/test/java/org/apache/calcite/test/RelMdColumnOriginsTest.java
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@@ -74,4 +78,25 @@
     statement.close();
     connection.close();
   }
+

Review comment:
       ok, I will try it ,thanks! I thought i was testing RelMdColumnOrigins, 
so ...
   
   > Extending from `SqlToRelConverterTest` is not a good idea, why not move 
the test case directly into `RelOptRulesTest` ?
   
   




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