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MySql通用分页存储过程 过程参数
代码如下:
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); #拼接查询总记录的SQL语句 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; #获取动态SQL语句返回值 set p_recordcount = @recordcount; #根据总记录跳数计算出总页数 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; #拼接分页查询记录的动态SQL语句 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 $
代码如下:
#拼接查询总记录的SQL语句 set v_sqlcounts = concat('select count(*) into @recordcount from ',v_tables,v_where); set @sqlcounts := v_sqlcounts; #预处理动态SQL prepare stmt from @sqlcounts; #传递动态SQL内参数 set @s1= categoryid; execute stmt using @s1; deallocate prepare stmt; #获取动态SQL语句返回值 set recordcount = @recordcount;
#拼接查询总记录的SQL语句 set v_sqlcounts = concat('select count(*) into @recordcount from ',v_tables,v_where); set @sqlcounts := v_sqlcounts; #预处理动态SQL prepare stmt from @sqlcounts; #传递动态SQL内参数 set @s1= categoryid; execute stmt using @s1; deallocate prepare stmt; #获取动态SQL语句返回值 set recordcount = @recordcount; 以上我上再做存储过程分页里用到动态SQL里将查询到的count记录条数通过变量@recordcount放到recordcount里面了。 mysql的IF ELSE和其他数据库的判断有点不一样，简单的判断语句如下。
代码如下:
#根据总记录跳数计算出总页数 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;
#根据总记录跳数计算出总页数 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;