Question

我的PostgreSQL版本是10.5。什么是hibernate.version 4.3.8.Final的正确Hibernate方言？请注意，该问题与正确的休眠方言有关。休眠版本可能较旧。

Hibernate org.hibernate.dialect.PostgreSQL95Dialect还是org.hibernate.dialect.PostgreSQL82Dialect？

这是application.properties

#Database related properties
database.driver=com.postgresql.jdbc.Driver
database.url=jdbc:postgresql://localhost:5432/springdb
database.user=postgres
database.password=*****************

#Hibernate related properties
hibernate.dialect=org.hibernate.dialect.PostgreSQL95Dialect
hibernate.show_sql=true
hibernate.format_sql=true
hibernate.hbm2ddl.auto=update

这是pom.xml：

<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 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.package.spring</groupId>
    <artifactId>SpringMVCHibernateCRUD</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>SpringMVCHibernateCRUD Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <!-- Specifying the Versions of Spring, Hiberante, PostgreSQL etc -->
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring.version>4.1.5.RELEASE</spring.version>
        <hibernate.version>4.3.8.Final</hibernate.version>  
        <postgresql.version>9.4.1212.jre6</postgresql.version>
        <junit-version>4.12</junit-version>
        <servlet-api-version>3.1.0</servlet-api-version>
        <jsp-version>2.1</jsp-version>
        <jstl-version>1.2</jstl-version>
        <java.version>1.10</java.version>       
    </properties>
       <dependencies>
              <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
            <scope>test</scope>
        </dependency>

        <!-- Hibernate 4 dependencies -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>${hibernate.version}</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-c3p0</artifactId>
            <version>${hibernate.version}</version>
        </dependency>

        <!--PostgreSQL Connector -->
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>${postgresql.version}</version>
        </dependency>

        <!-- Servlet and JSP -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>${servlet-api-version}</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>${jsp-version}</version>
            <scope>provided</scope>
        </dependency>

        <!-- JSTL dependency -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>${jstl-version}</version>
        </dependency>

        <!-- JUnit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit-version}</version>
            <scope>test</scope>
        </dependency>

       </dependencies>
       <build>
              <finalName>SpringMVCHibernateCRUD</finalName>
              <plugins>
              <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
                <configuration>
                    <includes>
                        <include>**/*Tests.java</include>
                    </includes>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>
        </plugins>

       </build>
</project>

Answer 1

因为postgresql 10是新的。我认为org.hibernate.dialect.PostgreSQL95Dialect是要走的路。我在这里没有看到任何新的课程。

All dialects

在搜索时，我看到了https://www.muehlencord.de/wordpress/2018/01/30/hibernate-uuid-issues-postgres-10/。额外信息：尝试坚持使用版本9，直到解决所有10个问题为止。

Answer 2

对于Postgres 8.2及更高版本，理想的SQL方言是org.hibernate.dialect.PostgreSQL82Dialect，而对于PostgreSQL 9.5及更高版本，理想的SQL方言是org.hibernate.dialect.PostgreSQL95Dialect。由于您的版本是10.5。最好的选择是使用PostgreSQL95Dialect，直到出现更多更新的方言为止。

休眠方言？

2 个答案: