Hibernate Criteria导致ORA-00918:列定义不明确

Question

我正在运行以下代码:

      Criteria crit = dao.getSesion().createCriteria(TAmbitos.class);
      crit.add( Restrictions.sqlRestriction("translate(upper(nombre), 'ÁÉÍÓÚ', 'AEIOU') like translate(upper(?),'ÁÉÍÓÚ', 'AEIOU')",
              param+"%", Hibernate.STRING));
      crit.add(Restrictions.eq("tipoAmbito", "Empresa"));
      crit.setFetchMode("TAmbitosByPais", FetchMode.JOIN);
      crit.createAlias("TAmbitosByPais", "TAmbitosByPais", CriteriaSpecification.LEFT_JOIN);
      crit.add(Restrictions.eq("TAmbitosByPais", ambito));

这会导致ORA-00918: column ambiguously defined异常。标准有一个表TAmbitos，它通过TAmbitosByPais引用自己(任何给定的TAmbitos行都有一个字段TAmbitosByIdPais，它引用另一个TAmbitos)。生成的SQL为:

SELECT this_.id_ambito AS id1_2_1_, this_.depende_empresa AS depende2_2_1_,
   this_.id_zona AS id3_2_1_, this_.pais AS pais2_1_,
   this_.id_cls_soc AS id5_2_1_, this_.tipo_ambito AS tipo6_2_1_,
   this_.nombre AS nombre2_1_, this_.clave_antigua AS clave8_2_1_,
   this_.desactivado AS desactiv9_2_1_,
   tambitosby1_.id_ambito AS id1_2_0_,
   tambitosby1_.depende_empresa AS depende2_2_0_,
   tambitosby1_.id_zona AS id3_2_0_, tambitosby1_.pais AS pais2_0_,
   tambitosby1_.id_cls_soc AS id5_2_0_,
   tambitosby1_.tipo_ambito AS tipo6_2_0_,
   tambitosby1_.nombre AS nombre2_0_,
   tambitosby1_.clave_antigua AS clave8_2_0_,
   tambitosby1_.desactivado AS desactiv9_2_0_
  FROM sac_conf.t_ambitos this_ LEFT OUTER JOIN sac_conf.t_ambitos tambitosby1_
       ON this_.pais = tambitosby1_.id_ambito
 WHERE TRANSLATE (UPPER (nombre), 'ÁÉÍÓÚ', 'AEIOU') LIKE
                                       TRANSLATE (UPPER (?), 'ÁÉÍÓÚ', 'AEIOU')
   AND this_.tipo_ambito = ?
   AND this_.pais = ?

在WHERE子句中可以看到，SQL无法判断我引用的是哪个"nombre"字段。我可以通过在sqlconstraint:

中添加this_来克服这个问题。

crit.add( Restrictions.sqlRestriction("translate(upper(this_.nombre), 'ÁÉÍÓÚ', 'AEIOU') like translate(upper(?),'ÁÉÍÓÚ', 'AEIOU')",
                  nombre+"%", Hibernate.STRING));

但我不知道这是否是最好的解决方案，因为我不能确定SQL是否会引用总是查询表作为this_。还有另一种方法来定义标准，使"nombre"引用TAmbitos.nombre而不是TAmbitosByIdPais.nombre ?

谢谢。

Answer 1

Hibernate Criteria API支持一个特殊的{alias}占位符:

crit.add( Restrictions.sqlRestriction(
   "translate(upper({alias}.nombre), 'ÁÉÍÓÚ', 'AEIOU') like translate(upper(?),'ÁÉÍÓÚ', 'AEIOU')",
   param+"%", Hibernate.STRING)); 

Answer 2

救援文档:

应用以SQL表示的约束。任何{alias}的出现都将

(强调我的)