テーブルが存在しない場合にのみテーブルを作成するには、どうすれば休止状態にすることができますか？

Question

テーブルが存在しない場合にのみテーブルを作成するには、どうすれば休止状態にすることができますか？私はちょうど「アップデート」を「hibernate.hbm2ddl.auto」に設定してもエラーが似ているIE-サーバーの再起動中にエラーを与えている

マイpersistence.xmlのが「関係がすでに存在している」： -

<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="com.adwork"> 
    <description>Adwork</description> 
    <provider>org.hibernate.ejb.HibernatePersistence</provider> 
    <!-- <class>com.mkyong.bean.User</class> --> 
    <properties> 
     <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/> 
     <property name="hibernate.hbm2ddl.auto" value="update"/> 
     <property name="show_sql" value="true"/> 
     <property name="hibernate.temp.use_jdbc_metadata_defaults" value="false"/> 

     <property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver"/> 
     <property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/adwork"/> 
     <property name="javax.persistence.jdbc.user" value="root"/> 
     <property name="javax.persistence.jdbc.password" value="root"/> 
    </properties> 
</persistence-unit> 

助けてください。おかげ

ここではエラーである： -

ERROR: org.springframework.web.context.ContextLoader - Context initialization failed 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'applicationStartUp' defined in ServletContext resource [/WEB-INF/spring/root-context.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: com.adwork] Unable to build Hibernate SessionFactory 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) 
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:775) 
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) 
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) 
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444) 
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326) 
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) 
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4727) 
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5189) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:724) 
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:700) 
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734) 
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:596) 
at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1805) 
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) 
at java.util.concurrent.FutureTask.run(Unknown Source) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
at java.lang.Thread.run(Unknown Source) 
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: com.adwork] Unable to build Hibernate SessionFactory 
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:877) 
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:805) 
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:58) 
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55) 
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39) 
at com.adwork.survey.config.ApplicationStartUp.initIt(ApplicationStartUp.java:27) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
at java.lang.reflect.Method.invoke(Unknown Source) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1706) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1645) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) 
... 25 more 
Caused by: org.hibernate.tool.schema.spi.SchemaManagementException: Unable to execute schema management to JDBC target [alter table person add column createdDate timestamp not null] 
at org.hibernate.tool.schema.internal.TargetDatabaseImpl.accept(TargetDatabaseImpl.java:59) 
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlString(SchemaMigratorImpl.java:420) 
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlStrings(SchemaMigratorImpl.java:438) 
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.migrateTable(SchemaMigratorImpl.java:247) 
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigrationToTargets(SchemaMigratorImpl.java:170) 
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:60) 
at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:129) 
at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:97) 
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:481) 
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444) 
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:802) 
... 36 more 
Caused by: org.postgresql.util.PSQLException: ERROR: column "createddate" of relation "person" already exists 
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2270) 
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1998) 
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255) 
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:570) 
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:406) 
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2Statement.java:334) 
at org.hibernate.tool.schema.internal.TargetDatabaseImpl.accept(TargetDatabaseImpl.java:56) 
... 46 more 

マイドメインクラス： -

@Entity 
@Table(name = "person") 
public class Person implements Serializable 
{ 
/** 
* 
*/ 
private static final long serialVersionUID = 5129388836708407722L; 

@Id 
private Long id; 

@OneToOne 
@JoinColumn(name = "userId") 
private Users user; 

@Column(name = "firstName",nullable = false) 
private String firstName; 

@Column(name = "middleName",nullable = false) 
private String middleName; 

@Column(name = "lastName",nullable = false) 
private String lastName; 

@Column(name = "gender",nullable = false) 
private String gender; 

@Column(name = "dateOfBirth",nullable = false) 
private Date dateOfBirth; 

@Column(name = "age",nullable = false) 
private Byte age; 

@Column(name = "createdDate",nullable = false) 
private Timestamp createdDate; 

@Column(name = "lastUpdatedDate",nullable = false) 
private Timestamp lastUpdateDate; 

public Person() 
{ 
    // TODO Auto-generated constructor stub 
} 
//and setters/getters 
} 

DBテーブル・スクリプトを作成します - 変更された列名と

CREATE TABLE person 
(
    id bigint NOT NULL, 
    age smallint NOT NULL, 
    createddate timestamp without time zone NOT NULL, 
    dateofbirth date NOT NULL, 
    firstname character varying(255) NOT NULL, 
    gender character varying(255) NOT NULL, 
    lastname character varying(255) NOT NULL, 
    lastupdateddate timestamp without time zone NOT NULL, 
    middlename character varying(255) NOT NULL, 
    userid bigint, 
    CONSTRAINT person_pkey PRIMARY KEY (id), 
    CONSTRAINT fkd8ja1o2m8k25sf0mxvhu4c0ti FOREIGN KEY (userid) 
    REFERENCES users (user_id) MATCH SIMPLE 
    ON UPDATE NO ACTION ON DELETE NO ACTION 
) 
WITH (
    OIDS=FALSE 
); 
ALTER TABLE person 
    OWNER TO root; 

表： -

CREATE TABLE person 
(
    id bigint NOT NULL, 
    age smallint NOT NULL, 
    "createdDate" timestamp without time zone NOT NULL, 
    dateofbirth date NOT NULL, 
    firstname character varying(255) NOT NULL, 
    gender character varying(255) NOT NULL, 
    lastname character varying(255) NOT NULL, 
    lastupdateddate timestamp without time zone NOT NULL, 
    middlename character varying(255) NOT NULL, 
    userid bigint, 
    CONSTRAINT person_pkey PRIMARY KEY (id), 
    CONSTRAINT fkd8ja1o2m8k25sf0mxvhu4c0ti FOREIGN KEY (userid) 
    REFERENCES users (user_id) MATCH SIMPLE 
    ON UPDATE NO ACTION ON DELETE NO ACTION 
) 
WITH (
    OIDS=FALSE 
); 
ALTER TABLE person 
    OWNER TO root; 

今、私は、サーバーと新しいエラーが発生して再起動します -

Feb 21, 2017 11:26:07 AM org.apache.catalina.startup.Catalina load 
INFO: Initialization processed in 1572 ms 
SLF4J: Class path contains multiple SLF4J bindings. 
SLF4J: Found binding in [jar:file:/D:/sts-bundle/pivotal-tc-server- developer-3.2.2.RELEASE/base-instance/wtpwebapps/FeePaymentPortal/WEB-INF/lib/slf4j-log4j12-1.6.6.jar!/org/slf4j/impl/StaticLoggerBinder.class] 
SLF4J: Found binding in [jar:file:/D:/sts-bundle/pivotal-tc-server-developer-3.2.2.RELEASE/base-instance/wtpwebapps/FeePaymentPortal/WEB-INF/lib/slf4j-simple-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class] 
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. 
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory] 
INFO : org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization started 
INFO : org.springframework.web.context.support.XmlWebApplicationContext - Refreshing Root WebApplicationContext: startup date [Tue Feb 21 11:26:11 IST 2017]; root of context hierarchy 
INFO : org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from ServletContext resource [/WEB-INF/spring/root-context.xml] 
INFO : org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from ServletContext resource [/WEB-INF/spring/security-context.xml] 
INFO : org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor - JSR-330 'javax.inject.Inject' annotation found and supported for autowiring 
WARN : org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl - HHH000402: Using Hibernate built-in connection pool (not for production use!) 
ERROR: org.hibernate.tool.hbm2ddl.SchemaExport - HHH000389: Unsuccessful: alter table role drop constraint FKgg3583634e0ydkacyk8wbbm19 
ERROR: org.hibernate.tool.hbm2ddl.SchemaExport - ERROR: relation "role" does not exist 
ERROR: org.hibernate.tool.hbm2ddl.SchemaExport - HHH000389: Unsuccessful: alter table user_roles drop constraint FKhfh9dx7w3ubf1co1vdev94g3f 
ERROR: org.hibernate.tool.hbm2ddl.SchemaExport - ERROR: relation "user_roles" does not exist 
INFO : org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 7665 ms 
INFO : org.springframework.web.servlet.DispatcherServlet - FrameworkServlet 'appServlet': initialization started 
INFO : org.springframework.web.context.support.XmlWebApplicationContext - Refreshing WebApplicationContext for namespace 'appServlet-servlet': startup date [Tue Feb 21 11:26:18 IST 2017]; parent: Root WebApplicationContext 
INFO : org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from ServletContext resource [/WEB-INF/spring/appServlet/servlet-context.xml] 
INFO : org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor - JSR-330 'javax.inject.Inject' annotation found and supported for autowiring 
INFO : org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Mapped "{[/],methods=[GET]}" onto public java.lang.String org.giks.controllers.HomeController.home(org.springframework.ui.ModelMap) 
INFO : org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Mapped "{[/payment-month],methods=[GET]}" onto public java.lang.String org.giks.controllers.HomeController.paymentMonth(org.springframework.ui.ModelMap) 
INFO : org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Mapped "{[/payment-type],methods=[GET]}" onto public java.lang.String org.giks.controllers.HomeController.paymentMethod(org.springframework.ui.ModelMap) 
INFO : org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Mapped "{[/payment-verified],methods=[GET]}" onto public java.lang.String org.giks.controllers.HomeController.paymentVerified(org.springframework.ui.ModelMap) 
INFO : org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Mapped "{[/student-fees],methods=[GET]}" onto public java.lang.String org.giks.controllers.HomeController.getStudentFees(org.springframework.ui.ModelMap) 
INFO : org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Mapped "{[/student-details],methods=[GET]}" onto public java.lang.String org.giks.controllers.HomeController.getStudentDetails(org.springframework.ui.ModelMap) 
INFO : org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter - Looking for @ControllerAdvice: WebApplicationContext for namespace 'appServlet-servlet': startup date [Tue Feb 21 11:26:18 IST 2017]; parent: Root WebApplicationContext 
INFO : org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter - Looking for @ControllerAdvice: WebApplicationContext for namespace 'appServlet-servlet': startup date [Tue Feb 21 11:26:18 IST 2017]; parent: Root WebApplicationContext 
INFO : org.springframework.web.servlet.handler.SimpleUrlHandlerMapping - Mapped URL path [/resources/**] onto handler 'org.springframework.web.servlet.resource.ResourceHttpRequestHandler#0' 
INFO : org.springframework.web.servlet.DispatcherServlet - FrameworkServlet 'appServlet': initialization completed in 2426 ms 
Feb 21, 2017 11:26:21 AM org.apache.catalina.startup.Catalina start 
INFO: Server startup in 14090 ms 

Answer 1

私は主な問題は、PostgreSQLの列名は大文字と小文字は区別されません（と、それはデフォルトで小文字に引用符で囲まれていない列名に変換）ということであると信じ、しかしHibernateはです。

• あなたのドメインクラスがcreatedDateを指定し、資本D.
• あなたのテーブルにはcreateddateを使用して、D.
• 小文字のスキーマを更新しようとHibernateは、：だからあなたの元createddate列を持つ例えば

  （hibernate.hbm2ddl.auto =アップデートが）、ドメインクラスに指定されているようcreatedDateという名前の列を探し、1大文字と小文字を区別し、"createddate" != "createdDate"のでを見つけ、その列を追加する必要があり、それを行うにしようと考えていません。

• PostgreSQL（大文字小文字を区別しない）に準拠した名前の列が存在するため、追加操作が失敗します。

だからあなたのオプションがあります：

1. は、列の作成文でそのyou must quote the column nameに注意して、テーブルの使用マッチング場合とカラム名を確認し、あなたのドメインクラスに小文字の列名を指定するか、または
2. 大文字小文字を保存する

あなたが見たように、あなたがcreatedDateに手動でテーブルの列名を変更したときに、それは（したがって、新しいものをさらす）その最初のエラーを解決しました。 「存在しない関係...」に関する新しいエラーについては

は、私は全くわからないが、私は、あなたがさらに調査する必要があります this is also connected to case-sensitivity issues in table namesと思い 。少なくとも、それは一つの可能​​性です。

簡単なオプションがあるかどうかを知るために、私はHibernateで十分にPostgreSQLを使用しません。いくつかの方言オプションやどこかで一緒に素敵なプレイをするためのもの。