Github user myui commented on a diff in the pull request:

    https://github.com/apache/incubator-hivemall/pull/107#discussion_r130797590
  
    --- Diff: resources/ddl/define-all.hive ---
    @@ -543,8 +543,8 @@ create temporary function lr_datagen as 
'hivemall.dataset.LogisticRegressionData
     -- Evaluating functions --
     --------------------------
     
    -drop temporary function if exists f1score;
    -create temporary function f1score as 'hivemall.evaluation.FMeasureUDAF';
    +drop temporary function if exists fmeasure;
    +create temporary function fmeasure as 'hivemall.evaluation.FMeasureUDAF';
    --- End diff --
    
    Could you remain alias for `f1score` in DDLs for backward compatibility.
    
    ```sql
    -- alias for backward compatibility
    drop temporary function if exists f1score;
    create temporary function f1score as 'hivemall.evaluation.FMeasureUDAF';
    
    drop temporary function if exists fmeasure;
    ...
    ```


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