mysql - 使用 MySQL 5.5 在 Hibernate HQL 中从 Int 转换为 Long

Question

我有这个 HQL 查询，我需要从 floor(e.timestamp/(1000*60*60*24))*60*60*24 返回的值很长，但是使用cast()不起作用，因为mysql不接受BigInt或Long类型的强制转换。我找不到正确的方法来执行此操作。

SELECT new DayEvent(
e.apiProxyId, 
e.apiKey, 
e.methodId,
floor(e.timestamp/(1000*60*60*24))*60*60*24, 
sum(e.count), 
e.region)                        
FROM Event AS e 
WHERE e.timestamp <= :endTimestamp 
AND e.timestamp >= :startTimestamp 
GROUP BY floor(e.timestamp/(1000*60*60*24)), e.methodId, e.apiKey, e.region, e.apiProxyId`

Answer 1

Hibernate 支持 HQL 中的强制转换:

SELECT new DayEvent(
e.apiProxyId, 
e.apiKey, 
e.methodId,
cast(floor(e.timestamp/(1000*60*60*24))*60*60*24 as long), 
sum(e.count), 
e.region)                        
FROM Event AS e 
WHERE e.timestamp <= :endTimestamp 
AND e.timestamp >= :startTimestamp 
GROUP BY floor(e.timestamp/(1000*60*60*24)), e.methodId, e.apiKey, e.region, e.apiProxyId