HSQLException on session.list. Error: Unexpected token "Entity name"

Question

我正在为其中一个项目设置 hibernate/JPA，但 运行 遇到了奇怪的错误。

每当我尝试调用 session.list() 时，我首先会收到以下警告。

6565 [main] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper  - SQL Error: -5581, SQLState: 42581 

在此之后，我收到以下错误。

意外标记：ADSUBCONTE8_

详细的堆栈跟踪：-

org.hibernate.exception.SQLGrammarException: could not prepare statement
    at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:82)
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:125)
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:188)
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:159)
    at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1858)
    at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1835)
    at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1815)
    at org.hibernate.loader.Loader.doQuery(Loader.java:899)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:341)
    at org.hibernate.loader.Loader.doList(Loader.java:2522)
    at org.hibernate.loader.Loader.doList(Loader.java:2508)
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2338)
    at org.hibernate.loader.Loader.list(Loader.java:2333)
    at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:124)
    at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1662)
    at org.hibernate.internal.CriteriaImpl.list(CriteriaImpl.java:374)

Caused by: java.sql.SQLSyntaxErrorException: unexpected token: ADSUBCONTE8_
    at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
    at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
    at org.hsqldb.jdbc.JDBCPreparedStatement.<init>(Unknown Source)
    at org.hsqldb.jdbc.JDBCConnection.prepareStatement(Unknown Source)
    at org.apache.commons.dbcp.DelegatingConnection.prepareStatement(DelegatingConnection.java:281)
    at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.prepareStatement(PoolingDataSource.java:313)
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.doPrepare(StatementPreparerImpl.java:161)
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:182)
    ... 49 more
Caused by: org.hsqldb.HsqlException: unexpected token: ADSUBCONTE8_
    at org.hsqldb.error.Error.parseError(Unknown Source)
    at org.hsqldb.ParserBase.unexpectedToken(Unknown Source)
    at org.hsqldb.ParserDQL.XreadSimpleValueExpressionPrimary(Unknown Source)
    at org.hsqldb.ParserDQL.XreadAllTypesValueExpressionPrimary(Unknown Source)
    at org.hsqldb.ParserDQL.XreadAllTypesPrimary(Unknown Source)
    at org.hsqldb.ParserDQL.XreadAllTypesFactor(Unknown Source)
    at org.hsqldb.ParserDQL.XreadAllTypesTerm(Unknown Source)
    at org.hsqldb.ParserDQL.XreadAllTypesCommonValueExpression(Unknown Source)
    at org.hsqldb.ParserDQL.XreadValueExpression(Unknown Source)
    at org.hsqldb.ParserDQL.XreadSelect(Unknown Source)
    at org.hsqldb.ParserDQL.XreadQuerySpecification(Unknown Source)
    at org.hsqldb.ParserDQL.XreadSimpleTable(Unknown Source)
    at org.hsqldb.ParserDQL.XreadQueryPrimary(Unknown Source)
    at org.hsqldb.ParserDQL.XreadQueryTerm(Unknown Source)
    at org.hsqldb.ParserDQL.XreadQueryExpressionBody(Unknown Source)
    at org.hsqldb.ParserDQL.XreadQueryExpression(Unknown Source)
    at org.hsqldb.ParserDQL.compileCursorSpecification(Unknown Source)
    at org.hsqldb.ParserCommand.compilePart(Unknown Source)
    at org.hsqldb.ParserCommand.compileStatement(Unknown Source)
    at org.hsqldb.Session.compileStatement(Unknown Source)
    at org.hsqldb.StatementManager.compile(Unknown Source)
    at org.hsqldb.Session.execute(Unknown Source)
    ... 55 more

多对一关系中两个 class 的 java class 如下（突出显示感兴趣的行）

/**
 * The persistent class for the ad_context_tags database table.
 * 
 */
@Entity
@Table(name = "ad_context_tags")
@NamedQuery(name = "AdContextTagEntity.findAll", query = "SELECT a FROM AdContextTagEntity a")
public class AdContextTagEntity implements Serializable
{
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(unique = true, nullable = false)
    private int id;

    @Column(name = "created_by", nullable = false, length = 100)
    private String createdBy;

    @Temporal(TemporalType.DATE)
    @Column(name = "creation_date", nullable = false)
    private Date creationDate;

    @Temporal(TemporalType.DATE)
    @Column(name = "last_update_date")
    private Date lastUpdateDate;

    // bi-directional many-to-one association to AdCategoryEntity
    @ManyToOne
    @JoinColumn(name = "category", nullable = false)
    private AdCategoryEntity adCategory;

    // bi-directional many-to-one association to AdPageInfoEntity
    @ManyToOne
    @JoinColumn(name = "page_info", nullable = false)
    private AdPageInfoEntity adPageInfo;

    // bi-directional many-to-one association to AdSlotFamilyEntity
    @ManyToOne
    @JoinColumn(name = "`slot_group`", nullable = false)
    private AdSlotFamilyEntity adSlotFamily;

    // bi-directional many-to-one association to MarketplaceMappingEntity
    @ManyToOne
    @JoinColumn(name = "siterealm")
    private LegacyMarketplaceMappingEntity marketplaceMapping;

// ========== the field that gives the error below. Class defined later in the post ======
        @ManyToOne
        @JoinColumn(name = "subcontext")
        private AdSubcontextEntity subcontextEntity;

        public AdSubcontextEntity getSubcontextEntity()
        {
             return subcontextEntity;
        }

         public void setSubcontextEntity(AdSubcontextEntity subcontextEntity)
         {
             this.subcontextEntity = subcontextEntity;
          }


    public AdContextTagEntity()
    {
    }

    public int getId()
    {
        return this.id;
    }

    public void setId(int id)
    {
        this.id = id;
    }

    public String getCreatedBy()
    {
        return this.createdBy;
    }

    public void setCreatedBy(String createdBy)
    {
        this.createdBy = createdBy;
    }

    public Date getCreationDate()
    {
        return this.creationDate;
    }

    public void setCreationDate(Date creationDate)
    {
        this.creationDate = creationDate;
    }

    public Date getLastUpdateDate()
    {
        return this.lastUpdateDate;
    }

    public void setLastUpdateDate(Date lastUpdateDate)
    {
        this.lastUpdateDate = lastUpdateDate;
    }

    public AdCategoryEntity getAdCategory()
    {
        return this.adCategory;
    }

    public void setAdCategory(AdCategoryEntity adCategory)
    {
        this.adCategory = adCategory;
    }

    public AdPageInfoEntity getAdPageInfo()
    {
        return this.adPageInfo;
    }

    public void setAdPageInfo(AdPageInfoEntity adPageInfo)
    {
        this.adPageInfo = adPageInfo;
    }

    public AdSlotFamilyEntity getAdSlotFamily()
    {
        return this.adSlotFamily;
    }

    public void setAdSlotFamily(AdSlotFamilyEntity adSlotFamily)
    {
        this.adSlotFamily = adSlotFamily;
    }

    public LegacyMarketplaceMappingEntity getMarketplaceMapping()
    {
        return this.marketplaceMapping;
    }

    public void setMarketplaceMapping(LegacyMarketplaceMappingEntity marketplaceMapping)
    {
        this.marketplaceMapping = marketplaceMapping;
    }

    public DcAdLocation constructSerializable()
    {
        // TODO Auto-generated method stub
        return new DcAdLocation();
    }

}

有问题的 class 如下：-

@Entity
@Table(name="ad_subcontext")
@NamedQuery(name="AdSubcontextEntity.findAll", query="SELECT a FROM AdSubcontextEntity a")
public class AdSubcontextEntity implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    @Column(unique=true, nullable=false)
    private int id;

    @Column(nullable=false, length=20)
    private String primary;

    @Column(length=11)
    private String secondary;

    public int getId() {
        return this.id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getPrimary() {
        return this.primary;
    }

    public void setPrimary(String primary) {
        this.primary = primary;
    }

    public String getSecondary() {
        return this.secondary;
    }

    public void setSecondary(String secondary) {
        this.secondary = secondary;
    }


}

hibernate生成的SQL如下：-

/**
 * select this_.id as id1_6_7_, this_.category as category5_6_7_,
 * this_.page_info as page6_6_7_, this_."slot_group" as slot7_6_7_,
 * this_.created_by as created2_6_7_, this_.creation_date as creation3_6_7_,
 * this_.foo as foo8_6_7_, this_.last_update_date as last4_6_7_, this_.siterealm
 * as sitereal9_6_7_, adcategory2_.id as id1_3_0_, adcategory2_.name as
 * name2_3_0_, adpageinfo3_.id as id1_8_1_, adpageinfo3_.page_family as
 * page5_8_1_, adpageinfo3_.browse_node as browse2_8_1_, adpageinfo3_.page_name
 * as page3_8_1_, adpageinfo3_.page_short_name as page4_8_1_, adpageamab4_.id as
 * id1_7_2_, adpageamab4_.amabotId as amabotId2_7_2_, adpageamab4_.family as
 * family3_7_2_, adslotfami5_.id as id1_12_3_, adslotfami5_."slot_family_name"
 * as slot2_12_3_, foo6_.id as id1_0_4_, foo6_.primary as primary2_0_4_,
 * foo6_.secondary as secondar3_0_4_, legacymark7_.id as id1_24_5_,
 * legacymark7_.client_id as client4_24_5_, legacymark7_.client_zone as
 * client2_24_5_, legacymark7_.marketplace_id as marketpl3_24_5_,
 * legacyclie8_.id as id1_19_6_, legacyclie8_.client_name as client2_19_6_ from
 * ad_context_tags this_ inner join ad_category adcategory2_ on
 * this_.category=adcategory2_.id inner join ad_page_info adpageinfo3_ on
 * this_.page_info=adpageinfo3_.id left outer join ad_page_amabot_mapping
 * adpageamab4_ on adpageinfo3_.page_family=adpageamab4_.id inner join
 * ad_slot_family adslotfami5_ on this_."slot_group"=adslotfami5_.id inner join
 * Foo foo6_ on this_.foo=foo6_.id left outer join marketplace_mappings
 * legacymark7_ on this_.siterealm=legacymark7_.id left outer join clients
 * legacyclie8_ on legacymark7_.client_id=legacyclie8_.id
 */

我自己也做了一些调查，看起来这个 ADSUBCONTE8 无论如何都会生成。我尝试将其重命名为 Crap.java 但随后我不断收到错误消息，作为意外标记 Crap6。 如果我尝试从父 AdContextTagEntity 中删除 AdSubContext，测试和构建会顺利通过。

请帮助我，因为我真的被困在这个问题上了。

Answer 1

看起来 SQL 是由您提供的，没有 "subcontextEntity" 字段，因为它不包含到 table ad_subcontext 的连接。

异常不在Hibernate中，而是在HSQLDB驱动中。因此，由于某些原因，驱动程序无法解析 SQL。

可能的原因：

使用"primary"、"secondary"作为字段名——这个名字可以为主键和副键保留。

在

中使用奇怪的名称“`slot_group`”

@JoinColumn(name = "`slot_group`", nullable = false)

或其他 "field name" 原因。

Answer 2

首先你是对的，警告和异常是相互关联的。警告和异常都指向指定的意外标记 here。

---

异常不在 Hibernate 中，但可能在 HSQLDB.The 子查询中似乎是问题所在。 Hsqldb 似乎无法解析子 queries.Some 我们可以尝试的东西。（如果您已经尝试过，我们深表歉意）

1. 尝试更改 primary 和 secondary 的列名称。基本上检查保留字，因为在命名中使用保留字时可能会出现此错误。
2. 检查你的 SQL 文件是否在独立模式下正确执行，并创建所有具有所有预期约束的表，特别是与 ad_subcontext table.Saying 有关，因为在您添加为问题的生成查询。在您的数据库上尝试类似的 SQL 我很确定它会出现类似的错误。