当从hibernate 5.2迁移到5.3时,hibernate尝试使用一个奇怪的序列

问题描述 投票:1回答:2

从hibernate 5.2.17升级到5.3.6后,我收到此错误:

Caused by: org.h2.jdbc.JdbcSQLException: Schéma "ENHANCED" non trouvé
Schema "ENHANCED" not found; SQL statement:
call next value for enhanced.SequenceStyleGenerator [90079-197]
    at org.h2.engine.SessionRemote.done(SessionRemote.java:623) ~[h2-1.4.197.jar:1.4.197]
    at org.h2.command.CommandRemote.prepare(CommandRemote.java:85) ~[h2-1.4.197.jar:1.4.197]
    at org.h2.command.CommandRemote.<init>(CommandRemote.java:51) ~[h2-1.4.197.jar:1.4.197]
    at org.h2.engine.SessionRemote.prepareCommand(SessionRemote.java:493) ~[h2-1.4.197.jar:1.4.197]
    at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1247) ~[h2-1.4.197.jar:1.4.197]
    at org.h2.jdbc.JdbcPreparedStatement.<init>(JdbcPreparedStatement.java:76) ~[h2-1.4.197.jar:1.4.197]
    at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:304) ~[h2-1.4.197.jar:1.4.197]
    at com.mchange.v2.c3p0.impl.NewProxyConnection.prepareStatement(NewProxyConnection.java:567) ~[c3p0-0.9.5.2.jar:0.9.5.2]
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$1.doPrepare(StatementPreparerImpl.java:87) ~[hibernate-core-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172) ~[hibernate-core-5.3.6.Final.jar:5.3.6.Final]

id字段以这种方式注释:

@Id
@GeneratedValue(generator = "enhanced.SequenceStyleGenerator")
@GenericGenerator(
    name = "enhanced.SequenceStyleGenerator", 
    parameters = {
            // this value needs to be used when creating the sequence in "increment-by" clause.
            @Parameter(name = "increment_size", value= "10"),
            // default name : hibernate_sequence
            @Parameter(name = "prefer_sequence_per_entity", value= "false"),
            @Parameter(name = "optimizer", value="pooled")
    },
    strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator")
@Column(name = "ID", nullable = false)
private Long id;

使用hibernate 5.2它可以正常工作,但不再适用于hibernate 5.3。

这里的迁移指南:https://github.com/hibernate/hibernate-orm/blob/5.3/migration-guide.adoc没有引用序列生成器的任何变化。

可能是什么问题 ?

java hibernate
2个回答
2
投票

我发现它是hibernate 5.3的新行为:

在方法SequenceStyleGenerator.determineSequenceName中添加了代码:

final Boolean preferGeneratorNameAsDefaultName = serviceRegistry.getService( ConfigurationService.class )
            .getSetting( AvailableSettings.PREFER_GENERATOR_NAME_AS_DEFAULT_SEQUENCE_NAME, StandardConverters.BOOLEAN, true );
if ( preferGeneratorNameAsDefaultName ) {
    final String generatorName = params.getProperty( IdentifierGenerator.GENERATOR_NAME );
    if ( StringHelper.isNotEmpty( generatorName ) ) {
        fallbackSequenceName = generatorName;
    }
}

新的默认行为是使用生成器名称作为序列名称。因此从hibernate 5.2迁移到5.3有两种可能性:

  • 将生成器名称更改为序列名称
  • 通过在hibernate配置(或生成器参数)中将hibernate.model.generator_name_as_sequence_name设置为false,恢复到不使用生成器名称的hibernate 5.2-行为

1
投票

您的生成器名称被解释为属于特定架构,重命名应修复此问题 - 避免使用点。

请查看手册第2.6.11节,了解如何命名和参数化生成器:https://docs.jboss.org/hibernate/stable/orm/userguide/html_single/Hibernate_User_Guide.html

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