mysql的高效存取过程分页

10w以上数据的效率比普通分页 快4-5倍

PROCEDURE p_pageList (m_pageNo int , m_perPageCnt int , m_indexcolumn varchar(100), m_column varchar(1000) , m_table varchar(1000) , m_condition varchar(1000), m_orderBy varchar(200) , inout m_totalPageCnt int)
BEGIN

IF m_totalPageCnt >=1 THEN
SET @sqlCnt = CONCAT('select count(1) into @pageCnt from ',m_table); -- 这条语句很关键，用来得到总数值
IF m_condition IS NOT NULL AND m_condition <> '' THEN
SET @sqlCnt = CONCAT(@sqlCnt,' where ',m_condition);
END IF;
PREPARE s_cnt from @sqlCnt;
EXECUTE s_cnt;
DEALLOCATE PREPARE s_cnt;
SET m_totalPageCnt = @pageCnt;
else
SET @pageCnt = 1; -- 总记录数
SET @limitStart = (m_pageNo - 1)*m_perPageCnt;
SET @limitEnd = m_perPageCnt;
SET @sql = CONCAT('select ',m_column,' from ',m_table); -- 主查询
SET @wsql = CONCAT('select ',m_indexcolumn,' from ',m_table); -- 子查询
IF m_condition IS NOT NULL AND m_condition <> '' THEN
SET @sql = CONCAT(@sql,' where ',m_condition);
SET @wsql = CONCAT(@wsql,' where ',m_condition);
END IF;

IF @limitStart<1000 THEN
IF m_orderBy IS NOT NULL AND m_orderBy <> '' THEN
SET @sql = CONCAT(@sql,' order by ',m_orderBy);
END IF;
SET @sql = CONCAT(@sql, ' limit ', @limitStart, ',', @limitEnd);
Else
IF m_orderBy IS NOT NULL AND m_orderBy <> '' THEN
SET @wsql = CONCAT(@wsql,' order by ',m_orderBy);
IF m_condition IS NOT NULL AND m_condition <> '' THEN
SET @sql = CONCAT(@sql,' and ', m_indexcolumn ,'>=(',@wsql, ' limit ', @limitStart,',1) ' ,' order by ', m_orderBy, ' limit ',@limitEnd);
else
SET @sql = CONCAT(@sql,' where ', m_indexcolumn ,'>=(',@wsql, ' limit ', @limitStart,',1) ' , ' order by ',m_orderBy, ' limit ',@limitEnd);
END IF;
Else
IF m_condition IS NOT NULL AND m_condition <> '' THEN
SET @sql = CONCAT(@sql,' and ', m_indexcolumn ,'>=(',@wsql, ' limit ', @limitStart,',1) ' , ' limit ',@limitEnd);
else
SET @sql = CONCAT(@sql,' where ', m_indexcolumn ,'>=(',@wsql, ' limit ', @limitStart,',1) ' , ' limit ',@limitEnd);
END IF;
END IF;
END IF;

PREPARE record from @sql;
EXECUTE record;
DEALLOCATE PREPARE record;

/*

select @sql;
*/

END IF;
END