public static TypeCheckProcFactory<ExprNodeDesc>.DefaultExprProcessor getExprNodeDefaultExprProcessor() {
    TypeCheckProcFactory<ExprNodeDesc> factory =
        new TypeCheckProcFactory<>(new ExprNodeDescExprFactory());
    return factory.getDefaultExprProcessor();
  }
Returns the default processor to generate Hive ExprNode from AST nodes.
ql/src/java/org/apache/hadoop/hive/ql/parse/type/ExprNodeTypeCheck.java