获取JDBC类型的没有方言映射的异常 [英] Getting Exception No Dialect mapping for JDBC type

问题描述

我是冬眠和Java的新手.我正在尝试执行本机sql查询，但是我被卡住了.谁能帮助我或检查我在哪里做错了?

I am new to hibernate and java. I'm trying to execute native sql query but I have been stuck. Can anyone can help me out or check where I'm doing mistake?

我的Java代码是:

try {
            trns = session.beginTransaction();
            String sql = "select principle,interest from salaryinfo where empid = " + selectedempid + "";
            SQLQuery query = session.createSQLQuery(sql);
            List<Object[]> rows = query.list();
            for (Object[] row : rows) {
                Salaryinfo si= new Salaryinfo();
                si.setPrinciple(Float.parseFloat(row[0].toString()));
                si.setInterest(Float.parseFloat(row[1].toString()));
                sis.add(si);
            }

错误跟踪:

Severe:   org.hibernate.MappingException: No Dialect mapping for JDBC type: 7
    at org.hibernate.dialect.TypeNames.get(TypeNames.java:56)
    at org.hibernate.dialect.TypeNames.get(TypeNames.java:81)
    at org.hibernate.dialect.Dialect.getHibernateTypeName(Dialect.java:192)
    at org.hibernate.loader.custom.CustomLoader.getHibernateType(CustomLoader.java:161)
    at org.hibernate.loader.custom.CustomLoader.autoDiscoverTypes(CustomLoader.java:131)
    at org.hibernate.loader.Loader.getResultSet(Loader.java:1678)
    at org.hibernate.loader.Loader.doQuery(Loader.java:662)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
    at org.hibernate.loader.Loader.doList(Loader.java:2145)
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029)
    at org.hibernate.loader.Loader.list(Loader.java:2024)
    .
    .
    .
    .

我确实调试了我的程序，发现我的程序在这行上坏了SQLQuery query = session.createSQLQuery(sql);

I did debug my program and found my program is breaking is on this line SQLQuery query = session.createSQLQuery(sql);

休眠配置文件:

<hibernate-configuration>
    <session-factory>
        <property name="hibernate.bytecode.use_reflection_optimizer">false</property>
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.password">****</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/empdata</property>
        <property name="hibernate.connection.username">****</property>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>

        <property name="hibernate.show_sql">false</property>
    <property name="hibernate.format_sql">false</property>
    <property name="hibernate.cache.use_query_cache">true</property>
    <property name="hibernate.c3p0.acquire_increment">1</property> 
    <property name="hibernate.c3p0.idle_test_period">10</property> <!-- seconds -->             
        <mapping resource="hibernate/Salaryinfo.hbm.xml" />   

    </session-factory>
</hibernate-configuration>

推荐答案

您需要在本机sqlquery语法中放入addScalar();.为了避免使用ResultSetMetadata的开销，或者只是为了更明确地说明返回的内容，可以使用addScalar().

You need to put addScalar(); in your native sqlquery syntax. To avoid the overhead of using ResultSetMetadata, or simply to be more explicit in what is returned, one can use addScalar().

赞！

SQLQuery query = session.createSQLQuery(sql)
  .addScalar("principle", new FloatType())
  .addScalar("interest", new FloatType());

这篇关于获取JDBC类型的没有方言映射的异常的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！