[GitHub] [incubator-pinot] npawar commented on pull request #5681: TransformConfig in IngestionConfig for ingestion transformations

[GitBox <gi...@apache.org>]

npawar commented on pull request #5681:
URL: https://github.com/apache/incubator-pinot/pull/5681#issuecomment-656802312


   > With this, do you think it's possible to support placeholders of some intermediate transform result, without adding them to the schema?
   > Also, can the filter use the transformed column? In other words, is the filtering pre-transformation or post-transformation?
   
   Yes, it should be possible now to add placeholders for intermediate results. **Those intermediate results can be used in filter** Filtering is post-transformation, and so any of the results of transformation can be used in filter. 
   However the intermediate results cannot be used in other transform functions at the moment, because we don't follow any particular order while executing the transform functions. This will be supported in the future, when we work on derived columns: https://github.com/apache/incubator-pinot/issues/5509


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