/// <summary>
    /// 动态sql查询类   可以为  select 1 from user left join role on user.id=role.userid where user.id>0 and role.id=user.roleid an roleid in (1,2,3,4)
    /// 不支持子查询 slect 1 from user where id ( select roleid from role)  也不支持on多条件  如 on a.id=b.id and a.name=b.name
    /// </summary>
   public class GraphQlSql
    {
        /// <summary>
        /// 主表
        /// </summary>
        public string MainTableName { get; set; }

        /// <summary>
        /// 主查询条件
        /// </summary>
      

        List<WhereCondition> Wheres { get; set; }
        
        /// <summary>
        /// 表关联
        /// </summary>
        
         List<TableRef> TableRefs { get; set; }
        
        public List<Fileds> SelectFields { get; set; }
   
        /// <summary>
        /// 分页索引 1开始 默认1
        /// </summary>

        public int PageIndex { get; set; }

        /// <summary>
        /// 分页大小  默认10
        /// </summary>
        public int PageSize { get; set; }

    }
/// <summary>
/// 表关联类
/// </summary>
    public class TableRef { 

        /// <summary>
        /// 连接方式  lefe join  right join 
        /// </summary>
        public string LinkType { get; set; }
        /// <summary>
        /// 连接的表名
        /// </summary>

        public string LinkTableName { get; set; }

        /// <summary>
        /// 表关联on条件集合
        /// </summary>
        public List<OnCondition> OnConditions { get; set; }



    }
    /// <summary>
    /// 表关联on条件集合
    /// </summary>
    public class OnCondition
    {

        /// <summary>
        /// 关联的左表名
        /// </summary>
        public string LeftTableName { get; set; }
        /// <summary>
        /// 关联的左表字段
        /// </summary>
        public string LeftTableField { get; set; }
        /// <summary>
        /// 关联的右表名
        /// </summary>
        public string RightTableName { get; set; }

        /// <summary>
        /// 关联的右表字段
        /// </summary>
        public string RightTableField { get; set; }


    }

    /// <summary>
    /// where条件类
    /// </summary>
    public class WhereCondition
    {



        /// <summary>
        /// 逻辑符号 如 and  or 
        /// </summary>
        public string LogicSymbol { get; set; }


        /// <summary>
        /// 关联的左表名  如果是字段间的比较，如 user.id=role.userid   则此值为user
        /// </summary>
        public string LeftTableName { get; set; }
        /// <summary>
        /// 关联的左表字段  如果是字段间的比较，如 user.id=role.userid   则此值为id
        /// </summary>
        public string LeftTableField { get; set; }


        /// <summary>
        /// 条件符号 如> = <
        /// </summary>
        public string ConditionSymbol { get; set; }

        /// <summary>
        /// 关联的右表名    如果是字段间的比较，如 user.id=role.userid   则此值为role
        /// </summary>
        public string RightTableName { get; set; }

        /// <summary>
        /// 关联的右表字段 如果是字段间的比较，如 user.id=role.userid   则此值为userid
        /// </summary>
        public string RightTableField { get; set; }

        /// <summary>
        /// 条件比较的值。如果不是字段的比较 而是值几个比较 用这个。 比如  id in (1,23,4)  则 此值为1,23,4
        /// </summary>
        public string ConditionValue { get; set; }



    }


    /// <summary>
    /// 要返回的字段  暂时不支持聚合函数
    /// </summary>
    public class Fileds { 
        /// <summary>
        ///表名
        /// </summary>
        public string TableName { get; set; }
        /// <summary>
        /// 字段名集合
        /// </summary>

        public List<string> Fields { get; set; }
    }