Hibernate createSQLQuery。如何获得布尔值

Question

session.createSQLQuery("SELECT EXISTS 
(SELECT 1 FROM master.invoices WHERE currency_id = 17879)").list() 

给了我BigInteger。 如何获得布尔值？

Answer 1

这里是如何工作的。

Boolean.valueOf((List<String>) session.createSQLQuery("SELECT IF 
(SELECT 1 FROM master.invoices WHERE currency_id = 17879) 
, 'true', 'false')").list()); 

Answer 2

尝试此相应老兄

SELECT CASE WHEN EXISTS(
SELECT * 
FROM 
master.invoices 
WHERE currency_id = 17879 
) 
THEN CAST(1 AS BIT) 
ELSE CAST(0 AS BIT) END