@Test
  public void testParseInsertValues() throws Exception {
    parseDriver.parse("INSERT INTO t1(a, b) VALUES (1,2),(3,4)", null);
  }
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