org.h2.jdbc.JdbcSQLException:找不到表"ALL_SEQUENCES"

Question

有人可以告诉我以下错误的原因.

我在我的项目中使用Hibernate并在服务器启动期间面临以下错误

15:04:27.909 [localhost-startStop-1] ERROR o.h.tool.hbm2ddl.SchemaValidator - HHH000319: Could not get database metadata
org.h2.jdbc.JdbcSQLException: Table "ALL_SEQUENCES" not found; SQL statement:
 select sequence_name from all_sequences  union select synonym_name   from all_synonyms us, all_sequences asq  where asq.sequence_name = us.table_name    and asq.sequence_owner = us.table_owner [42102-168]
    at org.h2.message.DbException.getJdbcSQLException(DbException.java:329) ~[h2-1.3.168.jar:1.3.168]
    at org.h2.message.DbException.get(DbException.java:169) ~[h2-1.3.168.jar:1.3.168]
    at org.h2.message.DbException.get(DbException.java:146) ~[h2-1.3.168.jar:1.3.168]
    at org.h2.command.Parser.readTableOrView(Parser.java:4770) ~[h2-1.3.168.jar:1.3.168]
    at org.h2.command.Parser.readTableFilter(Parser.java:1084) ~[h2-1.3.168.jar:1.3.168]
    at org.h2.command.Parser.parseSelectSimpleFromPart(Parser.java:1690) ~[h2-1.3.168.jar:1.3.168]

Answer 1

如果您在persistence-unit内部使用了错误的方言persistence.xml,或者您对错误的数据库进行了验证,则会发生这种情况.例如,当您针对本地H2数据库运行应用程序时,最好的选择是删除方言,因为Hibernate可以识别没有此属性的数据库(如果Hibernate的版本足以识别新的数据库).另一个解决方案是删除validate属性,但我不建议这样做,因为你在启动时没有数据库检查:

<properties>
    <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />
    <property name="hibernate.hbm2ddl.auto" value="validate" />
</properties>

Answer 2

您必须确保创建了表和序列。如果它被创建，那么它就会起作用。

该表"ALL_SEQUENCES"未创建。请检查您的数据库是否存在？

您的问题是未创建序列以及未创建表。

解决方案：

检查你的 hibernate.cfg.xml。它配置得不好。为了您的澄清，我在下面给出了一个cfg 文件：

<?xml version='1.0' encoding='utf-8'?>

<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

        <!-- Database connection settings -->
        <property name="connection.driver_class">org.h2.Driver</property>
        <property name="connection.url">jdbc:h2:database/test</property>
        <property name="connection.username">sa</property>
        <property name="connection.password"/>

        <property name="hibernate.default_schema">PUBLIC</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.H2Dialect</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <property name="hbm2ddl.auto">create</property>

        <mapping class="au.com.ozblog.hibernate.h2.example.User"/>

    </session-factory>

</hibernate-configuration>