休眠，MySQL的

Question

我有以下HQL查询：

UPDATE TaskAssessment taskAssessment 
SET taskAssessment.activeFlag = false 
WHERE taskAssessment IN 
(
SELECT taskAssessment2 
FROM TaskAssessment taskAssessment2 
Where taskAssessment2.activeFlag = true 
AND taskAssessment2.patient.id 
AND taskAssessment2.needsLevel.careNeed = :careNeed 
) 

但它给我的错误：

You can't specify target table 'TASK_ASSESSMENT' for update in FROM clause 

任何人都可以帮我纠正MySQL的查询和休眠。提前致谢。

Answer 1

要解决You can't specify target table 'TASK_ASSESSMENT' for update in FROM clause，重写查询使用JOIN代替IN（在MySQL中，你需要写这样的事情）：

UPDATE TaskAssessment a 
INNER JOIN TaskAssessment a2 ON (a2.id = a.id) 
SET a.activeFlag = 0 
WHERE a2.active_flag = 1 AND 
a2.patient_id = :patient_id AND a2.needsLevel_careNeed = :careNeed