H2 数据库：如何为表名设置小写字母？答案

【问题标题】：H2 Database: How to have lowercase for tablename?H2 数据库：如何为表名设置小写字母？
【发布时间】：2014-11-17 00:20:09
【问题描述】：

我想将所有表名都保留为小写。例如person
我使用Liquibase 设置我的数据库，它看起来像

http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd"> 添加人员表

我使用H2 数据库运行我的集成测试并在pom.xml 中设置为

   <cargo.datasource.datasource.earth>
        cargo.datasource.driver=${h2.driver}|
        cargo.datasource.url=${datasource.url}|
        cargo.datasource.jndi=${datasource.jndi}|
        cargo.datasource.username=${h2.user}|
        cargo.datasource.password=${h2.user}
    </cargo.datasource.datasource.earth>

datasource.url 的样子

<datasource.url>jdbc:h2:${project.build.directory}/earth;DATABASE_TO_UPPER=false</datasource.url>

当我运行mvn 时，我看到了

INFO 9/22/14 3:32 PM:liquibase: Successfully acquired change log lock
INFO 9/22/14 3:32 PM:liquibase: Dropping Database Objects in schema: UNIT-TESTING-PU.PUBLIC
INFO 9/22/14 3:32 PM:liquibase: Creating database history table with name: PUBLIC.DATABASECHANGELOG
INFO 9/22/14 3:32 PM:liquibase: Creating database history table with name: PUBLIC.DATABASECHANGELOG
INFO 9/22/14 3:32 PM:liquibase: Successfully released change log lock
INFO 9/22/14 3:32 PM:liquibase: Successfully acquired change log lock
INFO 9/22/14 3:32 PM:liquibase: Reading from PUBLIC.DATABASECHANGELOG
INFO 9/22/14 3:32 PM:liquibase: Reading from PUBLIC.DATABASECHANGELOG
INFO 9/22/14 3:32 PM:liquibase: Reading from PUBLIC.DATABASECHANGELOG
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/01.xml::09222014.0639::harit: Reading from PUBLIC.DATABASECHANGELOG
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/01.xml::09222014.0639::harit: Table person created
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/01.xml::09222014.0639::harit: ChangeSet liquibase/2014/01.xml::09222014.0639::harit ran successfully in 1ms
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/01.xml::09222014.0639::harit: Reading from PUBLIC.DATABASECHANGELOG
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/02.xml::09222014.0844::harit: Reading from PUBLIC.DATABASECHANGELOG
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/02.xml::09222014.0844::harit: New row inserted into person
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/02.xml::09222014.0844::harit: New row inserted into person
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/02.xml::09222014.0844::harit: New row inserted into person
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/02.xml::09222014.0844::harit: New row inserted into person
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/02.xml::09222014.0844::harit: New row inserted into person
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/02.xml::09222014.0844::harit: ChangeSet liquibase/2014/02.xml::09222014.0844::harit ran successfully in 3ms
INFO 9/22/14 3:32 PM:liquibase: liquibase/changelog.xml: liquibase/2014/02.xml::09222014.0844::harit: Reading from PUBLIC.DATABASECHANGELOG
INFO 9/22/14 3:32 PM:liquibase: Successfully released change log lock
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.929 sec
Running com.learner.integration.HelloIT
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.443 sec
Running com.learner.integration.PersonsIT
[INFO] [talledLocalContainer] 15:32:59,145 WARN  [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-15) SQL Error: 42102, SQLState: 42S02
[INFO] [talledLocalContainer] 15:32:59,146 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-15) Table "Person" not found; SQL statement:
[INFO] [talledLocalContainer] select person0_.id as id1_0_, person0_.firstName as firstNam2_0_, person0_.lastName as lastName3_0_ from Person person0_ [42102-181]
[INFO] [talledLocalContainer] 15:32:59,153 ERROR [org.jboss.as.ejb3.invocation] (default task-15) JBAS014134: EJB Invocation failed on component PersonManager for method public java.util.List com.learner.business.manager.PersonManager.getPersons(): javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not prepare statement
[INFO] [talledLocalContainer]   at org.jboss.as.ejb3.tx.CMTTxInterceptor.handleExceptionInOurTx(CMTTxInterceptor.java:190) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
[INFO] [talledLocalContainer]   at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:275) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
[INFO] [talledLocalContainer]   at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:340) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
[INFO] [talledLocalContainer]   at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:239) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
[INFO] [talledLocalContainer]   at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
[INFO] [talledLocalContainer]   at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
[INFO] [talledLocalContainer]   at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)

如您所见，liquibase 创建了person 表，我使用DATABASE_TO_UPPER=false 代替H2，它从PERSON 变为Person

问题
我如何告诉H2 我的表格都是小写的 -> person 而不是 Person？

【问题讨论】：

Javadocs for h2 声明“将此设置为“false”是实验性的”（强调我的）。
我不确定，谁创建了这个表？液化石油气？如果是，我想你需要添加标签liquibase。
@ThomasMueller，我也有兴趣在我的数据库中使用小写而不是大写的表。 h2 是否有可能具有忽略查询大小写或创建小写表（与当前相反）的功能？编写 SQL 时，我的 IDE 将完成所有内容。
@BrettRyan 不确定我是否理解问题以及您想要这样做的原因，我可能会问一个新问题。
大声笑，刚刚在这里看到你，以为我会作弊:) 当使用 sql 编辑器的自动完成功能（如在 NetBeans 中）时，就会出现问题。插入完整的引用将使它们与模式中的名称相同。我一直更喜欢所有小写标识符。

标签： java maven h2 liquibase

【解决方案1】：

在 h2 连接 URL 中使用 DATABASE_TO_LOWER=TRUE。示例：

url: jdbc:h2:mem:testdb;MODE=PostgreSQL;DATABASE_TO_LOWER=TRUE;CASE_INSENSITIVE_IDENTIFIERS=TRUE;

【讨论】：

【解决方案2】：

尝试在 H2 连接 URL 设置“database_to_upper=false”中使用。

【讨论】：