Postgresql'在hibernate中選擇distinct'

Question

hibernate是否支持select distinct on query？

SELECT DISTINCT ON (location) location, time, report
FROM weather_reports
ORDER BY location, time DESC;

有沒有辦法為該查詢創建hibernate標准？

Answer 1

既然這里有“懷疑”和“猜測”，當我偶然發現這個問題時，我肯定會回答：

不，Hibernate不支持DISTINCT ON查詢。

org.hibernate.hql.internal.ast.QuerySyntaxException: 
unexpected token: ON near line 1, column 17
[SELECT DISTINCT ON (location) location, time, report FROM weather_reports ORDER BY location, time DESC]

在Hibernate 4.3.9-final下測試

請注意，這不適用於普通的DISTINCT查詢。 請參閱https：//stackoverflow.com/questions/263850 ...