helloppx commented on issue #1715: [CALCITE-3662] Generate wrong SQL when plan 
contains Project(Sort(Aggregate)) and aggregate field has no alias
URL: https://github.com/apache/calcite/pull/1715#issuecomment-570484167
 
 
   > How about add a test in `RelToSqlConverterTest` ?
   
   I did some research. If we want to reproduce this JIRA case, we must use 
`SqlToRelConverter` to convert SQL to REL and then use `RelToSqlConverter` to 
generate SQL. If we move this case to `RelToSqlConverterTest`, It is not easy 
to use `SqlToRelTestBase#createTester()#convertSqlToRel(sql)` method for this 
case.

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