src/main/java/org/apache/datasketches/hive/cpc/UnionSketchUDAF.java [150:169]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
          Arrays.asList(
            PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.INT),
            PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.LONG),
            PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.BINARY)
          )
        );
      }
      // final results include just the sketch
      return PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.BINARY);
    }

    /**
     * Add the incoming sketch into the internal state.
     *
     * @param buf
     *          aggregation buffer storing intermediate results.
     * @param parameters
     *          sketches in the form of Object passed in to be merged.
     */
    @Override
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



src/main/java/org/apache/datasketches/hive/theta/UnionSketchUDAF.java [138:157]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
          Arrays.asList(
            PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.INT),
            PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.LONG),
            PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.BINARY)
          )
        );
      }
      // final results include just the sketch
      return PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.BINARY);
    }

    /**
     * Add the incoming sketch into the internal state.
     *
     * @param agg
     *          aggregation buffer storing intermediate results.
     * @param parameters
     *          sketches in the form of Object passed in to be merged.
     */
    @Override
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -