HSQLDB 对象名称已存在

Question

我正在尝试使用 2.2.9、Hibernate 3.6.9 和 Spring 3.1.2 版本设置 HSQL 数据库进行测试。我们一直在使用本地 postgresql 数据库，但正在转换以进行测试。我有 40-50 个测试类，总共有 200 多个测试。如果从 Eclipse 单独运行，每个测试类都可以正常工作。当我使用 Maven 编译和测试所有东西时，我有测试错误。在某些时候，它似乎试图再次运行我的 init.sql 脚本并再次创建表。我把这个作为我的最终原因:

Caused by: org.hsqldb.HsqlException: object name already exists: DUAL_ASSET_ASSETID_SEQ
at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.SchemaObjectSet.checkAdd(Unknown Source)
at org.hsqldb.SchemaManager.checkSchemaObjectNotExists(Unknown Source)
at org.hsqldb.StatementSchema.setOrCheckObjectName(Unknown Source)
at org.hsqldb.StatementSchema.getResult(Unknown Source)
at org.hsqldb.StatementSchema.execute(Unknown Source)
at org.hsqldb.Session.executeCompiledStatement(Unknown Source)
at org.hsqldb.Session.executeDirectStatement(Unknown Source)
at org.hsqldb.Session.execute(Unknown Source) ... 52 more 

我在创建该表时尝试使用“IF NOT EXISTS”，但是当我去创建序列时，我遇到了同样的错误。所以它试图做的不仅仅是一张表，而且我不能在 CREATE SEQUENCE 语句上使用“IF NOT EXISTS”，所以我被困在那里。

我的数据似乎再次加载有什么原因吗？我也偶尔收到此错误:

2012-10-16 10:55:48,489 [Thread-0] WARN
org.springframework.jdbc.datasource.embedded.HsqlEmbeddedDatabaseConfigurer:shutdown:46 - Could not shutdown embedded database java.sql.SQLException: Database lock acquisition failure: attempt to connect while db opening /closing
at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
at org.hsqldb.jdbc.JDBCConnection.<init>(Unknown Source)
at org.hsqldb.jdbc.JDBCDriver.getConnection(Unknown Source)
at org.hsqldb.jdbc.JDBCDriver.connect(Unknown Source)
at org.springframework.jdbc.datasource.SimpleDriverDataSource.getConnectionFromDriver(SimpleDriverDataSource.java:140)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
at org.springframework.jdbc.datasource.embedded.AbstractEmbeddedDatabaseConfigurer.shutdown(AbstractEmbeddedDatabaseConfigurer.java:40)
at org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseFactory.shutdownDatabase(EmbeddedDatabaseFactory.java:152)
at org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseFactoryBean.destroy(EmbeddedDatabaseFactoryBean.java:65)
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:211)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:498)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:474)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:442)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1071)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1045)
at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:963) Caused by: org.hsqldb.HsqlException: Database lock acquisition failure: attempt to connect while db opening /closing at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.DatabaseManager.getDatabase(Unknown Source)
at org.hsqldb.DatabaseManager.newSession(Unknown Source) ... 16 more

Answer 1

当前版本的 HSQLDB 允许 CREATE SEQUENCE IF NOT EXISTS 语句。

或者，对于测试，您可以在创建任何对象之前简单地删除 PUBLIC 模式的全部内容。

DROP SCHEMA PUBLIC CASCADE