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The Oracle9Dialect dialect has been deprecated; use either Oracle9iDialect or Oracle10gDialect instead
那是因为 Dialect  未定义,重写类,把未定义的Dialect 注册一下即可,
并且在 hibernate.cfg.xml中加入
<property name="hibernate.dialect">
    org.hibernate.dialect.OracleCustomDialect
</property>
新建一个类叫OracleCustomDialectprotected Dialect() {       log.info( "Using dialect: " + this );       sqlFunctions.putAll( STANDARD_AGGREGATE_FUNCTIONS );       // standard sql92 functions (can be overridden by subclasses)       registerFunction( "substring", new SQLFunctionTemplate( Hibernate.STRING, "substring(?1, ?2, ?3)" ) );       registerFunction( "locate", new SQLFunctionTemplate( Hibernate.INTEGER, "locate(?1, ?2, ?3)" ) );       registerFunction( "trim", new SQLFunctionTemplate( Hibernate.STRING, "trim(?1 ?2 ?3 ?4)" ) );       registerFunction( "length", new StandardSQLFunction( "length", Hibernate.INTEGER ) );       registerFunction( "bit_length", new StandardSQLFunction( "bit_length", Hibernate.INTEGER ) );       registerFunction( "coalesce", new StandardSQLFunction( "coalesce" ) );       registerFunction( "nullif", new StandardSQLFunction( "nullif" ) );       registerFunction( "abs", new StandardSQLFunction( "abs" ) );       registerFunction( "mod", new StandardSQLFunction( "mod", Hibernate.INTEGER) );       registerFunction( "sqrt", new StandardSQLFunction( "sqrt", Hibernate.DOUBLE) );       registerFunction( "upper", new StandardSQLFunction("upper") );       registerFunction( "lower", new StandardSQLFunction("lower") );       registerFunction( "cast", new CastFunction() );       registerFunction( "extract", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(?1 ?2 ?3)") );    
    //map second/minute/hour/day/month/year to ANSI extract(), override on subclasses       registerFunction( "second", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(second from ?1)") );       registerFunction( "minute", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(minute from ?1)") );       registerFunction( "hour", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(hour from ?1)") );       registerFunction( "day", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(day from ?1)") );       registerFunction( "month", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(month from ?1)") );       registerFunction( "year", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(year from ?1)") );   
 
    registerFunction( "str", new SQLFunctionTemplate(Hibernate.STRING, "cast(?1 as char)") );   
      // register hibernate types for default use in scalar sqlquery type auto detection       registerHibernateType( Types.BIGINT, Hibernate.BIG_INTEGER.getName() );       registerHibernateType( Types.BINARY, Hibernate.BINARY.getName() );       registerHibernateType( Types.BIT, Hibernate.BOOLEAN.getName() );       registerHibernateType( Types.CHAR, Hibernate.CHARACTER.getName() );       registerHibernateType( Types.DATE, Hibernate.DATE.getName() );       registerHibernateType( Types.DOUBLE, Hibernate.DOUBLE.getName() );       registerHibernateType( Types.FLOAT, Hibernate.FLOAT.getName() );       registerHibernateType( Types.INTEGER, Hibernate.INTEGER.getName() );       registerHibernateType( Types.SMALLINT, Hibernate.SHORT.getName() );       registerHibernateType( Types.TINYINT, Hibernate.BYTE.getName() );       registerHibernateType( Types.TIME, Hibernate.TIME.getName() );       registerHibernateType( Types.TIMESTAMP, Hibernate.TIMESTAMP.getName() );       registerHibernateType( Types.VARCHAR, Hibernate.STRING.getName() );       registerHibernateType( Types.VARBINARY, Hibernate.BINARY.getName() );       registerHibernateType( Types.NUMERIC, Hibernate.BIG_DECIMAL.getName() );       registerHibernateType( Types.DECIMAL, Hibernate.BIG_DECIMAL.getName() );       registerHibernateType( Types.BLOB, Hibernate.BLOB.getName() );       registerHibernateType( Types.CLOB, Hibernate.CLOB.getName() );       registerHibernateType( Types.REAL, Hibernate.FLOAT.getName() ); protected Dialect() {log.info( "Using dialect: " + this );sqlFunctions.putAll( STANDARD_AGGREGATE_FUNCTIONS );
 // standard sql92 functions (can be overridden by subclasses)registerFunction( "substring", new SQLFunctionTemplate( Hibernate.STRING, "substring(?1, ?2, ?3)" ) );registerFunction( "locate", new SQLFunctionTemplate( Hibernate.INTEGER, "locate(?1, ?2, ?3)" ) );registerFunction( "trim", new SQLFunctionTemplate( Hibernate.STRING, "trim(?1 ?2 ?3 ?4)" ) );registerFunction( "length", new StandardSQLFunction( "length", Hibernate.INTEGER ) );registerFunction( "bit_length", new StandardSQLFunction( "bit_length", Hibernate.INTEGER ) );registerFunction( "coalesce", new StandardSQLFunction( "coalesce" ) );registerFunction( "nullif", new StandardSQLFunction( "nullif" ) );registerFunction( "abs", new StandardSQLFunction( "abs" ) );registerFunction( "mod", new StandardSQLFunction( "mod", Hibernate.INTEGER) );registerFunction( "sqrt", new StandardSQLFunction( "sqrt", Hibernate.DOUBLE) );registerFunction( "upper", new StandardSQLFunction("upper") );registerFunction( "lower", new StandardSQLFunction("lower") );registerFunction( "cast", new CastFunction() );registerFunction( "extract", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(?1 ?2 ?3)") ); //map second/minute/hour/day/month/year to ANSI extract(), override on subclassesregisterFunction( "second", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(second from ?1)") );registerFunction( "minute", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(minute from ?1)") );registerFunction( "hour", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(hour from ?1)") );registerFunction( "day", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(day from ?1)") );registerFunction( "month", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(month from ?1)") );registerFunction( "year", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(year from ?1)") );registerFunction( "str", new SQLFunctionTemplate(Hibernate.STRING, "cast(?1 as char)") );&nbsp;// register hibernate types for default use in scalar sqlquery type auto detectionregisterHibernateType( Types.BIGINT, Hibernate.BIG_INTEGER.getName() );registerHibernateType( Types.BINARY, Hibernate.BINARY.getName() );registerHibernateType( Types.BIT, Hibernate.BOOLEAN.getName() );registerHibernateType( Types.CHAR, Hibernate.CHARACTER.getName() );registerHibernateType( Types.DATE, Hibernate.DATE.getName() );registerHibernateType( Types.DOUBLE, Hibernate.DOUBLE.getName() );registerHibernateType( Types.FLOAT, Hibernate.FLOAT.getName() );registerHibernateType( Types.INTEGER, Hibernate.INTEGER.getName() );registerHibernateType( Types.SMALLINT, Hibernate.SHORT.getName() );registerHibernateType( Types.TINYINT, Hibernate.BYTE.getName() );registerHibernateType( Types.TIME, Hibernate.TIME.getName() );registerHibernateType( Types.TIMESTAMP, Hibernate.TIMESTAMP.getName() );registerHibernateType( Types.VARCHAR, Hibernate.STRING.getName() );registerHibernateType( Types.VARBINARY, Hibernate.BINARY.getName() );registerHibernateType( Types.NUMERIC, Hibernate.BIG_DECIMAL.getName() );registerHibernateType( Types.DECIMAL, Hibernate.BIG_DECIMAL.getName() );registerHibernateType( Types.BLOB, Hibernate.BLOB.getName() );registerHibernateType( Types.CLOB, Hibernate.CLOB.getName() );registerHibernateType( Types.REAL, Hibernate.FLOAT.getName() );更多Oracle相关信息见Oracle 专题页面 http://www.linuxidc.com/topicnews.aspx?tid=12Oracle数据库用户创建规范expdp时出现错误:ORA-39006: internal error相关资讯      Oracle函数  hibernate  hibernate函数 
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