public void setColExprToGBMap(Map<ExprNodeDesc, GroupByOperator> colExprToGBMap) {
    this.colExprToGBMap = colExprToGBMap;
  }
@param opToPartToSkewedPruner
         the opToSkewedPruner to set
ql/src/java/org/apache/hadoop/hive/ql/parse/ParseContext.java