MySql通用分頁存儲過程
過程參數
復制代碼 代碼如下:
p_cloumns varchar(500),p_tables varchar(100),p_where varchar(4000),p_order varchar(100),p_pageindex int,p_pagesize int,out p_recordcount int,out p_pagecount int

 $:begin
    declare v_sqlcounts varchar(4000);
    declare v_sqlselect varchar(4000);
 #拼接查詢總記錄的SQL語句
   set v_sqlcounts = concat('select count(*) into @recordcount from ',p_tables,p_where);
    #select v_sqlcounts;leave $;
   set @sqlcounts = v_sqlcounts;
   prepare stmt from @sqlcounts;
        execute stmt;
  deallocate prepare stmt;
   #獲取動態SQL語句返回值
  set p_recordcount = @recordcount;
  #根據總記錄跳數計算出總頁數
   set p_pagecount = ceiling((p_recordcount+0.0)/p_pagesize);
   if p_pageindex <1 then
       set p_pageindex = 1;
     elseif p_pageindex > p_pagecount and p_pagecount <> 0 then
       set p_pageindex = p_pagecount;
   end if;
   #拼接分頁查詢記錄的動態SQL語句
   set v_sqlselect = concat('select ',p_cloumns,' from ',p_tables,p_where,if(p_order is not null,p_order,''),' limit ',(p_pageindex-1)*p_pagesize,' , ',p_pagesize);
   #select v_sqlselect;leave $;
   set @sqlselect = v_sqlselect;
    prepare stmtselect from @sqlselect;
   execute stmtselect;
    deallocate prepare stmtselect;
   end $

復制代碼 代碼如下:
#拼接查詢總記錄的SQL語句  
set v_sqlcounts = concat('select count(*) into @recordcount from ',v_tables,v_where);  
set @sqlcounts := v_sqlcounts;  
#預處理動態SQL  
prepare stmt from @sqlcounts;  
#傳遞動態SQL內參數  
set @s1= categoryid;  
execute stmt using @s1;  
deallocate prepare stmt;  
#獲取動態SQL語句返回值  
set recordcount = @recordcount; 

#拼接查詢總記錄的SQL語句
set v_sqlcounts = concat('select count(*) into @recordcount from ',v_tables,v_where);
set @sqlcounts := v_sqlcounts;
#預處理動態SQL
prepare stmt from @sqlcounts;
#傳遞動態SQL內參數
set @s1= categoryid; execute stmt using @s1; deallocate prepare stmt;
#獲取動態SQL語句返回值
set recordcount = @recordcount;
以上我上再做存儲過程分頁裡用到動態SQL裡將查詢到的count記錄條數通過變量@recordcount放到recordcount裡面了。
mysql的IF ELSE和其他數據庫的判斷有點不一樣，簡單的判斷語句如下。
復制代碼 代碼如下:
#根據總記錄跳數計算出總頁數  
set pagecount = ceiling((recordcount+0.0)/pagesize);  
if pageindex <1 then 
    set pageindex = 1;  
elseif pageindex > pagecount then 
    set pageindex = pagecount;  
else 
    select pageindex,pagecount;  
end if; 

#根據總記錄跳數計算出總頁數 set pagecount = ceiling((recordcount+0.0)/pagesize); if pageindex <1 then set pageindex = 1; elseif pageindex > pagecount then set pageindex = pagecount; else select pageindex,pagecount; end if;