我正在尝试使用boundingCoordinates检索数据集合。
由于这需要我使用一些已知的三角函数（正弦，余弦，弧度等），我知道该函数受数据库支持，但在JPA中不受支持，因此我尝试创建一个自定义方言来添加支持，并嵌套函数，因为我不知道如何在JPA中嵌套函数调用。
这是我创建的方言
public class ExtendedPostgreSQL94Dialect extends PostgreSQL94Dialect {
public ExtendedPostgreSQL94Dialect() {
super();
registerFunction("eto_radians",
new SQLFunctionTemplate(StandardBasicTypes.DOUBLE, "radians(cast(? as double precision ))"));
registerFunction("cos", new StandardSQLFunction("cos"));
registerFunction("eto_acos_sin",
new SQLFunctionTemplate(DoubleType.INSTANCE, "acos(sin(?))"));
registerFunction("eto_sin_radians",
new SQLFunctionTemplate(DoubleType.INSTANCE, "sin(radians(cast(? as double precision)))"));
registerFunction("eto_cos_radians",
new SQLFunctionTemplate(DoubleType.INSTANCE, "cos(radians(cast(? as double precision)))"));
registerFunction("eto_radians_distance",
new SQLFunctionTemplate(DoubleType.INSTANCE,
"acos(sin(?) * " +
"sin(radians(cast(? as double precision))) + " +
"cos(?) * " +
"cos(radians(cast(? as double precision))) * " +
"cos(radians(cast(? as double precision)) - ?)"));
}
}
以某种方式导致我的应用程序无法启动，并出现以下问题：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1778)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1105)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
at org.springframework.context.support.AbstractApplicationContext.__refresh(AbstractApplicationContext.java:549)
at org.springframework.context.support.AbstractApplicationContext.jrLockAndRefresh(AbstractApplicationContext.java:40002)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:41008)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:742)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:389)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:311)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1213)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1202)
at package.Application.main(Application.java:21)
Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:275)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214)
at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214)
at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:179)
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:119)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:904)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:935)
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.__createEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:57)
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:40002)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.__createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:42002)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:390)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:377)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1837)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1774)
... 18 common frames omitted
Caused by: org.hibernate.boot.registry.selector.spi.StrategySelectionException: Could not instantiate named strategy class [package.Application.ExtendedPostgreSQL94Dialect]
at org.hibernate.boot.registry.selector.internal.StrategySelectorImpl.resolveStrategy(StrategySelectorImpl.java:220)
at org.hibernate.boot.registry.selector.internal.StrategySelectorImpl.resolveDefaultableStrategy(StrategySelectorImpl.java:160)
at org.hibernate.boot.registry.selector.internal.StrategySelectorImpl.resolveDefaultableStrategy(StrategySelectorImpl.java:147)
at org.hibernate.boot.registry.selector.internal.StrategySelectorImpl.resolveStrategy(StrategySelectorImpl.java:141)
at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:74)
at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:51)
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:137)
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:94)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263)
... 37 common frames omitted
Caused by: org.hibernate.boot.registry.selector.spi.StrategySelectionException: Could not instantiate named strategy class [package.Application.ExtendedPostgreSQL94Dialect]
at org.hibernate.boot.registry.selector.internal.StrategySelectorImpl.lambda$static$0(StrategySelectorImpl.java:40)
at org.hibernate.boot.registry.selector.internal.StrategySelectorImpl.resolveStrategy(StrategySelectorImpl.java:216)
... 46 common frames omitted
Caused by: java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:592)
at java.lang.Integer.valueOf(Integer.java:766)
at org.hibernate.dialect.function.TemplateRenderer.<init>(TemplateRenderer.java:64)
at org.hibernate.dialect.function.SQLFunctionTemplate.<init>(SQLFunctionTemplate.java:52)
at org.hibernate.dialect.function.SQLFunctionTemplate.<init>(SQLFunctionTemplate.java:40)
at package.Application.ExtendedPostgreSQL94Dialect.<init>(ExtendedPostgreSQL94Dialect.java:14)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.__newInstance(DelegatingConstructorAccessorImpl.java:45)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45009)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45012)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at org.hibernate.boot.registry.selector.internal.StrategySelectorImpl.lambda$static$0(StrategySelectorImpl.java:36)
... 47 common frames omitted
Process finished with exit code 1
我在那里定义的功能有问题吗？
答案 0 :(得分：1)
事实证明，我做错了。
registerFunction("eto_acos_sin",
new SQLFunctionTemplate(DoubleType.INSTANCE, "acos(sin(?))"));
每个参数都需要编号/命名。由于它一直在寻找一个，但没有找到，因此它说什么也找不到。更改为此：
registerFunction("eto_acos_sin",
new SQLFunctionTemplate(DoubleType.INSTANCE, "acos(sin(?1))"));
然后它应该工作。