@Test(expected=UnsupportedOperationException.class)
public void getLimitStringWithPlaceHolader() {

	String OFFSET = ":offset";
	String LIMIT = ":limit";
	Assert.assertEquals("select * from user limit :limit", dialect.getLimitString("select * from user", 0,OFFSET, 0,LIMIT));
	Assert.assertEquals("select * from user limit :limit", dialect.getLimitString("select * from user", 0,OFFSET,12,LIMIT));
	Assert.assertEquals("select * from user limit :offset,:limit", dialect.getLimitString("select * from user", 12, OFFSET,0,LIMIT));
	Assert.assertEquals("select * from user limit :offset,:limit", dialect.getLimitString("select * from user", 12,OFFSET, 34,LIMIT));
}