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テーブルAはテーブルBとの関係があり、と1対多数という関係があるとします。 私がしたいのは、テーブルAからの制限と選択した結果テーブルへの参加後に選択を行うことですB。 私は問題を直面していますか？Hibernate：ネイティブSQL + addEntity（）を使用
典型的なCriteria.selectMaxResultsそれは私が必要とするものではなく、結合後に受け入れられ、テーブルから10の異なる行を得る代わりに許容されます。Aたとえば、テーブルAから10行テーブルB。
（1）それを行うにはどうすればよいですか？ 1つのクエリでAのユニークな行のみを選択し、他のクエリではAと結合を選択しますB？私はsession.createSQLQuery(sQuery)を使用しようとしたチュートリアルやドキュメントを休止状態に応じて、だから、
String sQuery = SELECT a.*,b* FROM (SELECT * FROM parentTable WHERE c.id=777 LIMIT 0,10) AS a, b.* WHERE a.id=b.a_id;
：一般的に
は、ネイティブSQL言語に、私は次のクエリを実行することを期待します。私の方法は次のように見えます：
@Override
@Transactional
public List<VocabularyWord> getWords(int vocId, int firstResult, int pageSize) {
Session s = this.template.getSessionFactory().getCurrentSession();
SQLQuery query = s.createSQLQuery("SELECT {vW.*}, m.* FROM (SELECT * FROM vocabulary_words AS vw WHERE vw.vocabulary_id=:id LIMIT :from,:size) AS vW, meaning AS m WHERE vW.id=m.vocabulary_words_id;");
query.setInteger("id", vocId);
query.setInteger("from", firstResult);
query.setInteger("size", pageSize);
query.addEntity("vW", VocabularyWord.class);
query.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
// If unccoment the next word I get error: Column 'id1_1_1_' not found. But as I'have understood I don't need this.
// query.addEntity("m", Meaning.class);
List l = query.list();
return l;
}
そして、このメソッドは私が望むものを返します。しかし、この結果を返すために、Hibernateは膨大な量のクエリを実行します。 （彼は（1）のような何かをしようとする？）。ビーイング正確Hibernateが実行される5次照会：
Hibernate:
SELECT
vW.id as id1_7_0_,
vW.original_text as original2_7_0_,
vW.transcription as transcri3_7_0_,
vW.vocabulary_id as vocabula4_7_0_,
m.*
FROM
(SELECT
*
FROM
vocabulary_words AS vw
WHERE
vw.vocabulary_id=? LIMIT ?,?) AS vW,
meaning AS m
WHERE
vW.id=m.vocabulary_words_id;
Hibernate:
select
meaning0_.vocabulary_words_id as vocabula5_1_0_,
meaning0_.id as id1_1_0_,
meaning0_.id as id1_1_1_,
meaning0_.definition as definiti2_1_1_,
meaning0_.example as example3_1_1_,
meaning0_.translation as translat4_1_1_,
meaning0_.vocabulary_words_id as vocabula5_1_1_,
meaning0_.w_type as w_type6_1_1_
from
meaning meaning0_
where
meaning0_.vocabulary_words_id=?
Hibernate:
select
meaning0_.vocabulary_words_id as vocabula5_1_0_,
meaning0_.id as id1_1_0_,
meaning0_.id as id1_1_1_,
meaning0_.definition as definiti2_1_1_,
meaning0_.example as example3_1_1_,
meaning0_.translation as translat4_1_1_,
meaning0_.vocabulary_words_id as vocabula5_1_1_,
meaning0_.w_type as w_type6_1_1_
from
meaning meaning0_
where
meaning0_.vocabulary_words_id=?
Hibernate:
select
meaning0_.vocabulary_words_id as vocabula5_1_0_,
meaning0_.id as id1_1_0_,
meaning0_.id as id1_1_1_,
meaning0_.definition as definiti2_1_1_,
meaning0_.example as example3_1_1_,
meaning0_.translation as translat4_1_1_,
meaning0_.vocabulary_words_id as vocabula5_1_1_,
meaning0_.w_type as w_type6_1_1_
from
meaning meaning0_
where
meaning0_.vocabulary_words_id=?
Hibernate:
select
meaning0_.vocabulary_words_id as vocabula5_1_0_,
meaning0_.id as id1_1_0_,
meaning0_.id as id1_1_1_,
meaning0_.definition as definiti2_1_1_,
meaning0_.example as example3_1_1_,
meaning0_.translation as translat4_1_1_,
meaning0_.vocabulary_words_id as vocabula5_1_1_,
meaning0_.w_type as w_type6_1_1_
from
meaning meaning0_
where
meaning0_.vocabulary_words_id=?
マイVocabularyWordエンティティ：
public class VocabularyWord implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id", updatable = false, nullable = false)
private int id;
@Column(name = "vocabulary_id", updatable = false, nullable = false)
private int vocId;
@Column(name = "original_text", nullable = false)
private String originalText;
@Column(name="transcription", nullable = true)
private String transcription;
@OneToMany (mappedBy = "vocWord", fetch = FetchType.EAGER, cascade = CascadeType.ALL)
private Set<Meaning> meaning;
// + getters and setters
}
マイ意味エンティティ：
public class Meaning implements Serializable {
@Id
@Column(name = "id", updatable = false, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private int id;
@JsonIgnore
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "vocabulary_words_id", nullable = false, updatable = false)
private VocabularyWord vocWord;
@JsonIgnore
@Column(name = "vocabulary_words_id", updatable = false, insertable = false)
private int vocWordId;
@Column(name = "w_type", nullable = true, unique = false)
private String wType;
@Column(name = "example", nullable = true, unique = false)
private String example;
@Column(name = "definition", nullable = true, unique = false)
private String definition;
@Column(name = "translation", nullable = true, unique = false)
private String translation;
//+ getters and setters
}
私はこの問題を解決するにはどうすればよいです？または、おそらく、私はそのクエリを実現するために他の方法を選んでいますか？
私は、助け、提案、アイデア、および関連リンクを感謝します。前もって感謝します。