在我的 Spring 4 应用程序中，我遇到了命名 native 查询的问题:
@NamedNativeQuery(name = "FindPostWithComments", query =
" SELECT * FROM ("
+ " SELECT p.*, "
+ " MATCH (description) AGAINST ('text') AS score "
+ " FROM posts as p"
+ " WHERE MATCH (description) AGAINST ('text') > 0 "
+ " LIMIT 0, 10 "
+ " ) p LEFT JOIN ( "
+ " SELECT c.*, "
+ " @rownumber := CASE WHEN @post_id = post_id THEN @rownumber + 1 ELSE 1 END AS n, "
+ " @post_id := post_id "
+ " FROM comments c, "
+ " (SELECT @rownumber := 0, @post_id := 0) r "
+ " WHERE MATCH (content) AGAINST ('text') > 0 "
+ " ORDER BY c.last_edited DESC, post_id DESC "
+ " ) c ON p.post_id = c.post_id "
+ " WHERE c.post_id IS NULL OR n BETWEEN 1 and 3 "
+ " ORDER BY score DESC "
, resultSetMapping = "PostWithComments")
@SqlResultSetMappings({
@SqlResultSetMapping(
name = "PostWithComments",
entities = {
@EntityResult(entityClass = Post.class, fields = {
@FieldResult(name = "id", column = "p.post_id"),
@FieldResult(name = "userId", column = "p.user_id"),
@FieldResult(name = "type", column = "p.type_id"),
@FieldResult(name = "description", column = "p.description"),
@FieldResult(name = "link", column = "p.link"),
@FieldResult(name = "dateCreated", column = "p.date_created"),
@FieldResult(name = "lastEdited", column = "p.last_edited"),
@FieldResult(name = "totalVotes", column = "p.total_votes"),
@FieldResult(name = "totalComments", column = "p.total_comments")
}
),
@EntityResult(entityClass = Comment.class, fields = {
@FieldResult(name = "id", column = "c.comment_id"),
@FieldResult(name = "post", column = "c.post_id"),
@FieldResult(name = "userId", column = "c.user_id"),
@FieldResult(name = "dateCreated", column = "c.date_created"),
@FieldResult(name = "lastEdited", column = "c.last_edited"),
@FieldResult(name = "content", column = "c.content"),
@FieldResult(name = "totalVotes", column = "c.total_votes")
}
)
}
)
})
它在应用程序启动期间失败，出现以下异常:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Errors in named queries: FindPostWithComments
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1566)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:956)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:747)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4728)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5162)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.hibernate.HibernateException: Errors in named queries: FindPostWithComments
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:545)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1859)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:852)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:845)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:398)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:844)
at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:152)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:338)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1625)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1562)
... 21 more
可能的原因是什么？
此查询在 MySQL 工作台中完美运行。
最佳答案
我自己找的原因。我需要在每个冒号前添加双斜杠，因此最终查询必须如下所示:
" SELECT * FROM ("
+ " SELECT p.*, "
+ " MATCH (description) AGAINST (:term) AS score "
+ " FROM posts as p"
+ " WHERE MATCH (description) AGAINST (:term) > 0 "
+ " LIMIT 0, 10 "
+ " ) p LEFT JOIN ( "
+ " SELECT c.*, "
+ " @rownumber \\:= CASE WHEN @post_id = post_id THEN @rownumber + 1 ELSE 1 END AS n, "
+ " @post_id \\:= post_id "
+ " FROM comments c, "
+ " (SELECT @rownumber \\:= 0, @post_id \\:= 0) r "
+ " WHERE MATCH (content) AGAINST (:term) > 0 "
+ " ORDER BY c.last_edited DESC, post_id DESC "
+ " ) c ON p.post_id = c.post_id "
+ " WHERE c.post_id IS NULL OR n BETWEEN 1 and 3 "
+ " ORDER BY score DESC "
关于mysql - hibernate 异常 : Errors in named queries: FindPostWithComments，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29344432/