[GitHub] [incubator-pinot] kishoreg opened a new pull request #4346: Adding support for udfs in Selection

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kishoreg opened a new pull request #4346: Adding support for udfs in Selection
URL: https://github.com/apache/incubator-pinot/pull/4346
 
 
   We currently support expressions and udf's in aggregation and group by but not in selection and filters. This PR adds support for expressions in selection.
   
   Now we can run queries as follows
   
   ```
   SELECT DaysSinceEpoch, timeConvert(DaysSinceEpoch,'DAYS','SECONDS') FROM mytable
   
   SELECT DaysSinceEpoch, timeConvert(DaysSinceEpoch,'DAYS','SECONDS') FROM mytable order by DaysSinceEpoch limit 10000
   
   SELECT DaysSinceEpoch, timeConvert(DaysSinceEpoch,'DAYS','SECONDS') FROM mytable order by timeConvert(DaysSinceEpoch,'DAYS','SECONDS') DESC limit 10000
   ```
   I haven't deleted the old SelectionOnlyOperator and SelectionOrderByOperator yet. 
   
   
   

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