【发布时间】：2020-08-02 23:03:07
【问题描述】：
到目前为止，我只有一个简单的空 Spring 应用程序（只有 main()），其中包含数据库配置 (Oracle) 和依赖项，如下所示。
在第一次测试运行期间，结果证明如果我使用 validate 或 update 而不是 spring.jpa.hibernate.ddl-auto=create-drop 会发生以下错误（请参阅错误消息）。使用create-drop，应用程序将启动并仅出现一个错误：“错误 o.h.e.j.e.i.JdbcEnvironmentImpl - 无法从数据库中获取 SequenceInformation
java.sql.SQLException: 数值溢出"
如果你能帮助我，我会很高兴。不幸的是，以前的论坛条目没有成功。
应用程序属性
Oracle 设置
spring.datasource.url=jdbc:oracle:thin:@//example:1521/example
spring.datasource.username=User
spring.datasource.password=user
spring.datasource.driver-class-name=oracle.jdbc.OracleDriver
spring.datasource.continueOnError: true
spring.batch.initialize-schema=always
HikariCP 设置
spring.datasource.hikari.connection-timeout=60000
spring.datasource.hikari.maximum-pool-size=5
日志记录
logging.pattern.console=%d{yyyy-MM-dd HH:mm:ss} %-5level %logger{36} - %msg%n
logging.level.org.hibernate.SQL=DEBUG
JPA/休眠
spring.jpa.show-sql=true
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto=validate
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.Oracle12cDialect
Pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>OracleDatabaseConnection</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>OracleDatabaseConnection</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc8</artifactId>
<version>12.2.0.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
实体类
import java.util.Set;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name="AMP_MS_USER")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator="USER_SEQUENCE")
@SequenceGenerator(sequenceName = "MS_USER_SEQUENCE", allocationSize = 1, name = "USER_SEQUENCE")
@Column(name="id_calcuser")
private Long id_calcuser;
@Column(name="username")
private String username;
@Column(name="password")
private String password;
public User() {
}
public User(String username, String password) {
super();
this.username = username;
this.password = password;
}
public Long getId_calcuser() {
return id_calcuser;
}
public void setId_calcuser(Long id_calcuser) {
this.id_calcuser = id_calcuser;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
SQL Developer 中的序列
-- Create sequence
create sequence MS_USER_SEQUENCE
minvalue 1
maxvalue 9999999999999999999999999999
start with 1
increment by 1
cache 20;
错误消息
2020-04-20 13:53:11 ERROR o.h.e.j.e.i.JdbcEnvironmentImpl - Could not fetch the SequenceInformation from the database
java.sql.SQLException: Numeric Overflow
at oracle.jdbc.driver.NumberCommonAccessor.throwOverflow(NumberCommonAccessor.java:4136)
at oracle.jdbc.driver.NumberCommonAccessor.getLong(NumberCommonAccessor.java:591)
at oracle.jdbc.driver.GeneratedStatement.getLong(GeneratedStatement.java:206)
at oracle.jdbc.driver.GeneratedScrollableResultSet.getLong(GeneratedScrollableResultSet.java:259)
at oracle.jdbc.driver.GeneratedResultSet.getLong(GeneratedResultSet.java:558)
at com.zaxxer.hikari.pool.HikariProxyResultSet.getLong(HikariProxyResultSet.java)
at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.resultSetMinValue(SequenceInformationExtractorLegacyImpl.java:134)
at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.extractMetadata(SequenceInformationExtractorLegacyImpl.java:60)
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentImpl.sequenceInformationList(JdbcEnvironmentImpl.java:403)
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentImpl.<init>(JdbcEnvironmentImpl.java:268)
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:114)
【问题讨论】：
-
嗨，西蒙，感谢您的回答。对我来说，使用“验证”或“更新”配置解决错误（'entityManagerFactory'：调用 init 方法失败；嵌套异常是 javax.persistence.PersistenceException...）更有帮助。使用“create-drop”，我只是想在这里展示应用程序可以正常工作，即使出现序列信息错误。
-
“bug”的原因是：java.sql.SQLException: Numeric Overflow 所以所有选项都一样
-
听起来像是您的 ID 生成问题。您可以发布您的 JPA 实体的代码吗？
-
我已经在上面添加了实体类和id生成序列:)
标签： oracle hibernate spring-boot jpa