@Test
  public void testParseInsert() throws Exception {
    ASTNode tree = parseDriver.parse(
            "insert into t1 select 1 a, 2 b, 3", null).getTree();

    System.out.println(tree.dump());
  }
Test cases for parse WITHIN GROUP clause syntax.
function(expression) WITHIN GROUP (ORDER BY sort_expression)
parser/src/test/org/apache/hadoop/hive/ql/parse/TestValuesClause.java