public static ColumnPrunerReduceSinkProc getReduceSinkProc() {
    return new ColumnPrunerReduceSinkProc();
  }
The Factory method to get ColumnPrunerReduceSinkProc class.

@return ColumnPrunerReduceSinkProc
ql/src/java/org/apache/hadoop/hive/ql/optimizer/ColumnPrunerProcFactory.java