public static boolean isAllConstants(List<ExprNodeDesc> value) {
    for (ExprNodeDesc expr : value) {
      if (!(expr instanceof ExprNodeConstantDesc)) {
        return false;
      }
    }
    return true;
  }
Get Map of ExprNodeColumnDesc HashCode to ExprNodeColumnDesc.

@param exprDesc
@param hashCodeToColumnDescMap
ql/src/java/org/apache/hadoop/hive/ql/plan/ExprNodeDescUtils.java