mysql存储过程在动态SQL内获取返回值

不需要使用游标循环来读取，直接select * into @变量就OK了，还可以传递参数来执行。 
1MySql通用分页存储过程
 2
 3过程参数
 4p_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
 5
 6$$:begin
 7declare v_sqlcounts varchar(4000);
 8declare v_sqlselect varchar(4000);
 9    #拼接查询总记录的SQL语句
10set v_sqlcounts = concat('select count(*) into @recordcount from ',p_tables,p_where);
11    #select v_sqlcounts;leave $$;
12set @sqlcounts = v_sqlcounts;
13prepare stmt from @sqlcounts;
14execute stmt;
15deallocate prepare stmt;
16    #获取动态SQL语句返回值
17set p_recordcount = @recordcount;
18    #根据总记录跳数计算出总页数
19set p_pagecount = ceiling((p_recordcount+0.0)/p_pagesize);
20if p_pageindex <1 then
21set p_pageindex = 1;
22    elseif p_pageindex > p_pagecount and p_pagecount <> 0 then
23set p_pageindex = p_pagecount;
24end if;
25    #拼接分页查询记录的动态SQL语句
26set 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);
27    #select v_sqlselect;leave $$;
28set @sqlselect = v_sqlselect;
29prepare stmtselect from @sqlselect;
30execute stmtselect;
31deallocate prepare stmtselect;
32end $$