public void test_false() throws Exception {
WallProvider provider = new MySqlWallProvider();
provider.getConfig().setSchemaCheck(true);
Assert.assertTrue(provider.checkValid(//
"SELECT c.table_name, column_name, column_type, is_nullable, column_key" + //
" , column_default, extra, collation_name, character_set_name, column_comment " + //
"FROM information_schema.columns c " + //
"INNER JOIN (" + //
" SELECT table_schema, table_name " + //