JPA命名查询匹配in子句中的元组列表

Question

我有这样一个实体：

class LinkRecord {
  String value;
  int linkType;
  ...
}

我正在使用（value,linkType）作为一个复合索引。对于给定的（v,t）元组列表,我们需要选择DB中的所有记录,使value=v,linkType=t。

基本上，我想构建这个查询：

SELECT * FROM LINK_RECORD WHERE (VALUE, LINK_TYPE) IN (('value1', 0), ('value2', 25), ...)

@Query("select r from LinkRecord r where (r.value, r.linkType) in :keys")
List<LinkRecord> findByValueAndType(@Param("keys")List<List<Object>> keys);

Answer 1

答案已经太迟了，但也许其他人也有同样的问题。这是我的一个工作例子。这里我需要搜索与给定复合键匹配的所有条目：

实体....

@Entity
@NamedQueries({
    @NamedQuery(name = "Article.findByIdAndAccessId", query = "SELECT a FROM Article a WHERE a.articlePk IN (:articlePks) ORDER BY a.articlePk.article")
})
@Table(name = "ARTICLE")
public class Article implements Serializable
{
    private static final long serialVersionUID = 1L;

    @EmbeddedId
    private ArticlePk articlePk = new ArticlePk();

    @Column(name = "art_amount")
    private Float amount;

    @Column(name = "art_unit")
    private String unit;

    public Article()
    {
    }

    //more code
}

PK类....

@Embeddable
public class ArticlePk implements Serializable
{
    private static final long serialVersionUID = 1L;

    @Column(name = "art_article")
    private String article;

    @Column(name = "art_acc_identifier")
    private Long identifier;

    public ArticlePk()
    {
    }

    public ArticlePk(String article, Long identifier)
    {
        this.article = article;
        this.identifier = identifier;
    }

    @Override
    public boolean equals(Object other)
    {
        if (this == other)
        {
            return true;
        }
        if (!(other instanceof ArticlePk))
        {
            return false;
        }

        ArticlePk castOther = (ArticlePk)other;
        return this.article.equals(castOther.article) && this.identifier.equals(castOther.identifier);
    }

    @Override
    public int hashCode()
    {
        final int prime = 31;
        int hash = 17;
        hash = hash * prime + this.article.hashCode();
        hash = hash * prime + this.identifier.hashCode();

        return hash;
    }

    //more code
}

TypedQuery<Article> queryArticle = entityManager.createNamedQuery("Article.findByIdAndAccessId", Article.class);
queryArticle.setParameter("articlePks", articlePks);
List<Article> articles = queryArticle.getResultList();