MySql：如何使用动态select语句创建临时表？

Question

正如你可以从标题理解的，我想通过使用动态选择语句来创建临时表。这里是我的代码：

declare strwhere varchar(30); 
if hour(now()) >= 16 and minute(now()) >=30 then 
    set strwhere = ' day(now()) +1 '; 
else 
    set strwhere = ' day(now()) '; 
end if; 
set @query = concat("select pc.customerid, 
        deliverytimespanid, 
        pc.id, 
        ca.districtid, 
        pc.status, 
        pc.orderid, 
        deliverydatetime 
       from packages as pc 
       inner join customeraddresses as ca on ca.id = pc.addressid 
       where pc.status = 1 
       and day(pc.deliverydatetime) =",strwhere," 
       and month(pc.deliverydatetime) = month(now()) 
       and year(pc.deliverydatetime) = year(now()) "); 

prepare resultset from @query; 
execute resultset; 
deallocate prepare resultset; 
create temporary table if not exists table2 as (select * from resultset); 

它返回

结果集不存在。

我应该如何选择结果？

Answer 1

使用SELECT声明创建表。你也可以缩短你的WHERE条款。

declare strwhere varchar(30); 
if hour(now()) >= 16 and minute(now()) >=30 then 
    set strwhere = ' CURDATE() + INTERVAL 1 DAY '; 
else 
    set strwhere = ' CURDATE() '; 
end if; 
set @query = concat("CREATE TEMPORARY TABLE table2 AS 
        SELECT pc.customerid, 
        deliverytimespanid, 
        pc.id, 
        ca.districtid, 
        pc.status, 
        pc.orderid, 
        deliverydatetime 
       from packages as pc 
       inner join customeraddresses as ca on ca.id = pc.addressid 
       where pc.status = 1 
       and pc.deliverydatetime =",strwhere," 
       ); 

prepare resultset from @query; 
execute resultset; 
deallocate prepare resultset;