public static ASTNode unqualifiedName(String colName) {
    ASTBuilder b = ASTBuilder.construct(HiveParser.TOK_TABLE_OR_COL, "TOK_TABLE_OR_COL").add(
        HiveParser.Identifier, colName);
    return b.node();
  }
@return an ASTNode representing a (table) reference to a CTE with the specified name and alias.
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/translator/ASTBuilder.java