/// <summary>
        /// 生产SQL
        /// </summary>
        public override void BuildSql()
        {
            BuildSql getSql = new BuildResultParser();
            var      res    = getSql.CreateSql(_datas, _filters, _filedName, _sql.ErrorMsg);

            _likeSql = res.likeSql;
            _field   = res.field;
            if (res.errorMsg != string.Empty)
            {
                _sql.ErrorMsg = res.errorMsg;
                BuildProduct();
            }
        }