小编Ben*_*Ben的帖子

SELECT T1.name AS hotel, 
       T2.name AS city 
  FROM (SELECT * 
          FROM hotel 
         WHERE name LIKE '$term1%') T1,
       (SELECT * 
          FROM city 
         WHERE name LIKE '$term2%') T2
 WHERE T1.city_id = T2.id

T1有150000,T2有15000.(静态表!)我有这个表'name'的索引.

有一种方法来优化这个mysql查询？我也想做 - > LIKE'%term1%',但非常慢.

我如何通过MPI发送和接收此类结构？

struct controlPoint{
    int hour,minute,second,x,y,z;
};

struct flight{
    int flightNum, controlNum;
    vector<controlPoint> point;
};

vector<flight> flights;

示例代码将非常有用