如何跳過超類表的模式生成？ Java/JPA/Hibernate/Annotations/Maven/hbm2ddl

Question

我們的應用程序需要與另一個本地運行的應用程序共享一個現有的數據庫表，因此，我希望引用此表，但是跳過爲其生成DDL。我也希望將應用程序模式中的表定義爲別名或MySQL合併表，但我可以將其添加到將在生成的模式腳本之前運行的手動腳本。

如何從myapp-schema-ddl.sql輸出中指定爲shared_schema表創建和更改表DDL是否被忽略？

從公共/ SRC /主/ JAVA/COM /公司/共享/ SharedSuperEntity.java：

@Entity 
@Table(name="shared_entity", catalog = "shared_schema") 
@Inheritance(strategy = InheritanceType.JOINED) 
public class SharedSuperEntity { 
    // fields, etc... 
} 

從MYAPP/SRC /主/ JAVA/COM /公司/共享/ SharedSuperEntity.java：

@Entity 
@Table(name="local_entity", catalog = "local_schema") 
public class LocalEntity extends SharedSuperEntity { 
    // fields, etc... 
} 

從MYAPP/SRC /主/資源/ META_INF/persistence.xml中：

<?xml version="1.0" encoding="UTF-8"?> 
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" 
version="2.0"> 
<persistence-unit name="MyAppPU" transaction-type="JTA"> 
    <provider>org.hibernate.ejb.HibernatePersistence</provider> 
    <jta-data-source>java:/LocalDS</jta-data-source> 
    <class>com.company.shared.SharedSuperEntity</class> 
    <class>com.company.myapp.LocalEntity</class> 
    <exclude-unlisted-classes>true</exclude-unlisted-classes> 
    <shared-cache-mode>NONE</shared-cache-mode> 
    <validation-mode>AUTO</validation-mode> 
    <properties> 
     <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup" /> 
     <property name="hibernate.show_sql" value="false" /> 
     <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" /> 
     <property name="hibernate.bytecode.use_reflection_optimizer" value="false" /> 
     <property name="hibernate.default_batch_fetch_size" value="4" /> 
     <property name="hibernate.default_entity_mode" value="pojo" /> 
     <property name="hibernate.generate_statistics" value="false" /> 
     <property name="hibernate.jdbc.batch_size" value="0" /> 
     <property name="hibernate.jdbc.batch_versioned_data" value="true" /> 
     <property name="hibernate.jdbc.fetch_size" value="0" /> 
     <property name="hibernate.jdbc.use_get_generated_keys" value="false" /> 
     <property name="hibernate.jdbc.use_scrollable_resultset" value="false" /> 
     <property name="hibernate.jdbc.use_streams_for_binary" value="false" /> 
     <property name="hibernate.hibernate.max_fetch_depth" value="3" /> 
     <property name="hibernate.order_updates" value="true" /> 
     <property name="hibernate.query.substitutions" value="true 1, false 0, yes 'Y', no 'N'" /> 
     <property name="hibernate.use_identifer_rollback" value="true" /> 
     <property name="hibernate.use_outer_join" value="false" /> 
     <property name="hibernate.use_sql_comments" value="false" /> 
     <property name="hibernate.id.new_generator_mappings" value="true" /> 
    </properties> 
</persistence-unit> 

從MYAPP/pom.xml的範圍內：

 <plugin> 
      <groupId>org.codehaus.mojo</groupId> 
      <artifactId>hibernate3-maven-plugin</artifactId> 
      <version>2.2</version> 
      <configuration> 
       <components> 
        <component> 
         <name>hbm2ddl</name> 
         <implementation>jpaconfiguration</implementation> 
        </component> 
       </components> 
       <componentProperties> 
        <persistenceunit>MyAppPU</persistenceunit> 
        <outputfilename>myapp-schema-ddl.sql</outputfilename> 
        <drop>false</drop> 
        <create>true</create> 
        <export>false</export> 
        <format>true</format> 
        <jdk5>true</jdk5> 
       </componentProperties> 
      </configuration> 
      <dependencies> 
       <dependency> 
        <groupId>org.hibernate</groupId> 
        <artifactId>hibernate-core</artifactId> 
        <version>3.6.0.Final</version> 
        <scope>compile</scope> 
       </dependency> 
       <dependency> 
        <groupId>org.hibernate</groupId> 
        <artifactId>hibernate-entitymanager</artifactId> 
        <version>3.6.0.Final</version> 
        <scope>compile</scope> 
       </dependency> 
       <dependency> 
        <groupId>org.hibernate.javax.persistence</groupId> 
        <artifactId>hibernate-jpa-2.0-api</artifactId> 
        <version>1.0.0.Final</version> 
        <scope>compile</scope> 
       </dependency> 
       <dependency> 
        <groupId>mysql</groupId> 
        <artifactId>mysql-connector-java</artifactId> 
        <version>5.1.16</version> 
        <type>jar</type> 
        <scope>compile</scope> 
       </dependency> 
      </dependencies> 
     </plugin> 

Answer 1

我不認爲Hibernate支持直接。您可以創建兩個配置文件：一個列出運行時的所有映射類，另一個省略模式生成的違規類。否則，您可能會查看某種後處理，如sed腳本，以便事後刪除DDL。