public static ConstantPropagateFilterProc getFilterProc() {
    return new ConstantPropagateFilterProc();
  }
Factory method to get the ConstantPropagateFilterProc class.

@return ConstantPropagateFilterProc
ql/src/java/org/apache/hadoop/hive/ql/optimizer/ConstantPropagateProcFactory.java