Inheritance: SqlStatement, IPlSqlStatement
        public async Task ExecuteNull()
        {
            var statement = new NullStatement();
            var result    = await statement.ExecuteAsync(context);

            Assert.Null(result);
        }
        public void SerializeNullStatement()
        {
            var statement = new NullStatement();
            var result    = BinarySerializeUtil.Serialize(statement);

            Assert.NotNull(result);
        }
        public void GetString()
        {
            var statement = new NullStatement();

            Assert.Equal("NULL;", statement.ToString());
        }