public void test_true() throws Exception {
WallProvider provider = new SQLServerWallProvider();
provider.getConfig().setSelectHavingAlwayTrueCheck(true);
Assert.assertFalse(provider.checkValid(//
"select * from t where LEN(HOST_NAME()) > 0"));
Assert.assertEquals(1, provider.getTableStats().size());
Assert.assertTrue(provider.getTableStats().containsKey("t"));
}