oracle 存储过程分页

浏览数：56 / 时间：2015年06月12日

将分页的存储过程封装到包中，包规范

create or replace package pkg_query as
  type cur_query is ref cursor;
PROCEDURE prc_query
       (p_tableName        in  varchar2,   --表名
        p_strWhere         in  varchar2,   --查询条件
        p_orderColumn      in  varchar2,   --排序的列
        p_orderStyle       in  varchar2,   --排序方式
        p_curPage          in out Number,  --当前页
        p_pageSize         in out Number,  --每页显示记录条数
        p_totalRecords     out Number,     --总记录数
        p_totalPages       out Number,     --总页数
        v_cur              out pkg_query.cur_query);   --返回的结果集
end pkg_query;

包体的实现如下

create or replace package body pkg_query as
PROCEDURE prc_query
       (p_tableName        in  varchar2,   --表名
        p_strWhere         in  varchar2,   --查询条件
        p_orderColumn      in  varchar2,   --排序的列
        p_orderStyle       in  varchar2,   --排序方式
        p_curPage          in out Number,  --当前页
        p_pageSize         in out Number,  --每页显示记录条数
        p_totalRecords     out Number,     --总记录数
        p_totalPages       out Number,     --总页数
        v_cur              out pkg_query.cur_query)   --返回的结果集
IS
   v_sql VARCHAR2(1000) := ‘‘;      --sql语句
   v_startRecord Number(4);         --开始显示的记录条数
   v_endRecord Number(4);           --结束显示的记录条数
BEGIN
   --记录中总记录条数
   v_sql := ‘SELECT COUNT(1) FROM ‘ || p_tableName || ‘ WHERE 1=1 ‘;
   IF p_strWhere IS NOT NULL or p_strWhere <> ‘‘ THEN
       v_sql := v_sql ||‘ and ‘|| p_strWhere;
   END IF;
   EXECUTE IMMEDIATE v_sql INTO p_totalRecords;

   --验证页面记录大小
   IF p_pageSize < 0 THEN
       p_pageSize := 0;
   END IF;

   --根据页大小计算总页数
   IF MOD(p_totalRecords,p_pageSize) = 0 THEN
       p_totalPages := p_totalRecords / p_pageSize;
   ELSE
       p_totalPages := floor(p_totalRecords / p_pageSize) + 1;
   END IF;

   --验证页号
   IF p_curPage < 1 THEN
       p_curPage := 1;
   END IF;
   IF p_curPage > p_totalPages THEN
       p_curPage := p_totalPages;
   END IF;

   --实现分页查询
   v_startRecord := (p_curPage - 1) * p_pageSize + 1;
   v_endRecord := p_curPage * p_pageSize;
   v_sql := ‘SELECT * FROM (SELECT a.*, rownum rn FROM ‘ ||
            ‘(SELECT * FROM ‘ || p_tableName;
   IF p_strWhere IS NOT NULL or p_strWhere <> ‘‘ THEN
       v_sql := v_sql || ‘ WHERE 1=1 and ‘ || p_strWhere;
   END IF;
   IF p_orderColumn IS NOT NULL or p_orderColumn <> ‘‘ THEN
       v_sql := v_sql || ‘ ORDER BY ‘ || p_orderColumn || ‘ ‘ || p_orderStyle;
   END IF;
   v_sql := v_sql || ‘) a WHERE rownum <= ‘ || v_endRecord || ‘) WHERE rn >= ‘
            || v_startRecord;
   DBMS_OUTPUT.put_line(v_sql);
   OPEN v_cur FOR v_sql;
END prc_query;
end pkg_query;

c# 调用存储过程

    private DataSet ExecuteProduce(string prodeceName, OracleParameter[] parms)
    {
        string connStr = ConfigurationManager.
            ConnectionStrings["RMS.DataAccess.Properties.Settings.ConnectionString"].ConnectionString;
        using (OracleConnection conn = new OracleConnection(connStr))
        {
            if (conn.State != ConnectionState.Open)
            {
                conn.Open();
            }
            OracleCommand cmd = new OracleCommand(prodeceName, conn);
            cmd.CommandType = CommandType.StoredProcedure;
            if (parms != null)
            {
                cmd.Parameters.AddRange(parms);
            }
            OracleDataAdapter oadp = new OracleDataAdapter(cmd);
            DataSet ds = new DataSet();
            oadp.Fill(ds);

            return ds;
        }
    }

    private DataSet Paging(string p_tableName, string p_strWhere, string p_orderColumn, string p_orderStyle, int p_curPage, int p_pageSize, ref int p_totalRecords, ref int p_totalPages)
    {
        string prodeceName = "pkg_query.prc_query";
        OracleParameter[] parms = new OracleParameter[]
        {
            new OracleParameter("p_tableName",OracleType.VarChar),
            new OracleParameter("p_strWhere",OracleType.VarChar),
            new OracleParameter("p_orderColumn",OracleType.VarChar),
            new OracleParameter("p_orderStyle",OracleType.VarChar),
            new OracleParameter("p_curPage",OracleType.Number),
            new OracleParameter("p_pageSize",OracleType.Number),
            new OracleParameter("p_totalRecords",OracleType.Number),
            new OracleParameter("p_totalPages",OracleType.Number),
            new OracleParameter("v_cur",OracleType.Cursor)
        };
        parms[4].Direction = ParameterDirection.InputOutput;
        parms[5].Direction = ParameterDirection.InputOutput;
        parms[6].Direction = ParameterDirection.Output;
        parms[7].Direction = ParameterDirection.Output;
        parms[8].Direction = ParameterDirection.Output;

        parms[0].Value = p_tableName;
        parms[1].Value = p_strWhere;
        parms[2].Value = p_orderColumn;
        parms[3].Value = p_orderStyle;
        parms[4].Value = p_curPage;
        parms[5].Value = p_pageSize;

        DataSet ds = ExecuteProduce(prodeceName, parms);
        p_totalRecords = Convert.ToInt32(parms[6].Value);
        p_totalPages = Convert.ToInt32(parms[7].Value);
        return ds;
    }