[英]Hibernate query.uniqueResult() throws NonUniqueResultException, but the record is Unique
[英]PostgreSQL and hibernate query.uniqueResult error
我必須將與oracle數據庫一起使用的系統更改為PostgreSQL。 在PostgreSQL查詢構建器中運行時,以下查詢返回“ 8”,
SELECT COUNT(*)
from database.client c
left join database.salutation t on c.SALUTATIONID = t.SALUTATIONID
left join database.add_details ad on ad.ADDDETAILID = c.ADTYPEID
left join database.add_type at on at.ADDTYPEID = ad.ADDTYPEID
left join database.geo_cat g on g.GEOID = ad.POSCODEID
left join database.cltype clt on clt.CLTYPE = '<CLIENTTYPE>'
inner join database.mapclient mc
on mc.CLIENTID = c.CLIENTID
and mc.CLTYPEID = clt.CLTYPEID
and mc.EFFDATE <= '06-JUN-2014'
在java類中,查詢執行如下
Query queryCount = getSession().createSQLQuery(countSql);
int count = ((Number) queryCount.uniqueResult()).intValue();
這在Oracle上工作正常,但在Postgre中,出現以下錯誤,
查詢未返回唯一結果:8
為什么會發生這種情況,我該怎么辦?
嘗試將select子句更改為:
SELECT COUNT(c.id) from database.client c
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