Question

我正在尝试将原生SQL查询转换为JPQL查询。首先介绍的是JPA实体和存储库接口：

LearnerActivity

@Entity
@Table(name = "learner_activity")
public class LearnerActivity implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @ManyToMany
    @JoinTable(name = "learner_activity_unit",
               joinColumns = @JoinColumn(name="learner_activitys_id", referencedColumnName="ID"),
               inverseJoinColumns = @JoinColumn(name="units_id", referencedColumnName="ID"))
    private Set<Unit> units = new HashSet<>();

    @ManyToMany
    @Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
    @JoinTable(name = "learner_activity_performance_criteria",
               joinColumns = @JoinColumn(name="learner_activitys_id", referencedColumnName="ID"),
               inverseJoinColumns = @JoinColumn(name="performance_criterias_id", referencedColumnName="ID"))
    private Set<PerformanceCriteria> performanceCriterias = new HashSet<>();
}

LearnerJobOnSiteChecklistSectionItem

@Entity
@Table(name = "learner_job_on_site_checklist_section_item")
public class LearnerJobOnSiteChecklistSectionItem implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @ManyToOne
    @JoinColumn(name = "learner_activity_id")
    private LearnerActivity learnerActivity;
}

LearnerPortfolioPerformanceCriteriaAchievement

@Entity
@Table(name = "learner_portfolio_performance_criteria_achievement")
public class LearnerPortfolioPerformanceCriteriaAchievement implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @ManyToOne
    @JoinColumn(name = "performance_criteria_id")
    private PerformanceCriteria performanceCriteria;

    @ManyToMany
    @Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
    @JoinTable(name = "learner_portfolio_performance_criteria_achievement_learner_job_on_site_checklist_section_item",
               joinColumns = @JoinColumn(name="learner_portfolio_performance_criteria_achievements_id", referencedColumnName="ID"),
               inverseJoinColumns = @JoinColumn(name="learner_job_on_site_checklist_section_items_id", referencedColumnName="ID"))
    private Set<LearnerJobOnSiteChecklistSectionItem> learnerJobOnSiteChecklistSectionItems = new HashSet<>();
}

我希望得到与LearnerPortfolioPerformanceCriteriaAchievement PerformanceCriteria LearnerJobOnSiteChecklistSectionItem具有相同Activity的所有public interface LearnerPortfolioPerformanceCriteriaAchievementRepository extends JpaRepository<LearnerPortfolioPerformanceCriteriaAchievement,Long> { @Query("select distinct lppca from LearnerJobOnSiteChecklistSectionItem si inner join si.learnerActivity la inner join LearnerPortfolioPerformanceCriteriaAchievement lppca where lppca.performanceCriteria member of la.performanceCriterias and si.id =:sectionItemId") public List<LearnerPortfolioPerformanceCriteriaAchievement> findForSectionItem(@Param("sectionItemId") Long sectionItemId); }。

LearnerPortfolioPerformanceCriteriaAchievementRepository

SELECT
  a.id
FROM
  learner_job_on_site_checklist_section_item AS i
JOIN
  learner_activity_performance_criteria AS c
ON
  c.learned_activitys_id = i.learned_activitys_id
INNER JOIN
  learner_portfolio_performance_criteria_achievement AS a
ON
  a.performance_criteria_id = c.performance_criterias_id
where i.id = 2

原生SQL

ON

了解我可以用WHERE子句替换我的SQL SELECT DISTINCT lppca FROM LearnerJobOnSiteChecklistSectionItem si INNER JOIN si.learnerActivity la INNER JOIN LearnerPortfolioPerformanceCriteriaAchievement lppca WHERE lppca.performanceCriteria MEMBER OF la.performanceCriterias AND si.id =:sectionItemId，到目前为止我最好的JPQL尝试是这样的：

Caused by: java.lang.IllegalStateException: No data type for node: org.hibernate.hql.internal.ast.tree.IdentNode 
 \-[IDENT] IdentNode: 'lppca' {originalText=lppca}

但是，运行此JPQL会引发以下异常：

if([[self cache] isEqualToNumber:[[NSNumber alloc] initWithInt:1]])
{
    [[NSURLCache sharedURLCache] setDiskCapacity:4 * 1024 * 1024];
    [[NSURLCache sharedURLCache] setMemoryCapacity:32 * 1024 * 1024];
    [self setRequestObj:[NSURLRequest requestWithURL:loadUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]];
}
else [self setRequestObj:[NSURLRequest requestWithURL:loadUrl cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60.0]];

Answer 1

以下查询将起作用：

SELECT
  a
FROM
  LearnerPortfolioPerformanceCriteriaAchievement  a
  , LearnerActivity                               v
  , LearnerJobOnSiteChecklistSectionItem          i
WHERE
  i.id                                            = :sectionItemId
AND i.learnerActivity                             = v
AND a.performanceCriteria                         MEMBER OF v.performanceCriterias
AND i                                             MEMBER OF a.learnerJobOnSiteChecklistSectionItems

创建了一个sample application来测试查询（我使用了更短更简单的类名来简化阅读）。

如何将我的本机SQL查询转换为JPQL查询

1 个答案: