Hello,

I have problems while trying to retrieve information from a SQL-server 2000 database. The problem occurs when i use a table which has a uniqueidentifier as primary key.

The ID in my class is of type Long, and somehow the JDBC driver cannot convert the uniqueidentifier to a Long value. This is the exception:

[java] Hibernate: select test0_.ID as ID0_, test0_.Naam as Naam0_, test0_.Postcode as Postcode0_, test0_.Datum as Datum0_, test0_.Verplicht as Verplicht0_ from tbl__Test_1 test0_
[java] 11:36:42,234 INFO LongType:132 - could not read column value from result set: ID0_; [Microsoft][SQLServer 2000 Driver for JDBC]Value can not be converted to requested type.
[java] 11:36:42,234 WARN JDBCExceptionReporter:71 - SQL Error: 0, SQLState: HY000
[java] 11:36:42,234 ERROR JDBCExceptionReporter:72 - [Microsoft][SQLServer 2000 Driver for JDBC]Value can not be converted to requested type.
[java] org.hibernate.exception.GenericJDBCException: could not execute query
[java] at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
[java] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
[java] at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
[java] at org.hibernate.loader.Loader.doList(Loader.java:2148)
[java] at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029)
[java] at org.hibernate.loader.Loader.list(Loader.java:2024)
[java] at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:375)
[java] at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:308)
[java] at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:153)
[java] at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1106)
[java] at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
[java] at tests.TestManager.listTests(Unknown Source)
[java] at tests.TestManager.main(Unknown Source)
[java] Caused by: java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Value can not be converted to requested type.
[java] at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source)
[java] at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
[java] at com.microsoft.jdbc.base.BaseData.getLong(Unknown Source)
[java] at com.microsoft.jdbc.base.BaseResultSet.getLong(Unknown Source)
[java] at com.microsoft.jdbc.base.BaseResultSet.getLong(Unknown Source)
[java] at org.hibernate.type.LongType.get(LongType.java:28)
[java] at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:113)
[java] at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:102)
[java] at org.hibernate.loader.Loader.getKeyFromResultSet(Loader.java:1088)
[java] at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:554)
[java] at org.hibernate.loader.Loader.doQuery(Loader.java:689)
[java] at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
[java] at org.hibernate.loader.Loader.doList(Loader.java:2145)

The mapping file for my test-class:

<hibernate-mapping>
<class name="tests.Test" table="tbl__Test_1">
<id name="id" column="ID">
<generator class="native"/>
</id>
<property name="naam" column="Naam"/>
<property name="postcode" column="Postcode"/>
<property name="datum" type="timestamp" column="Datum"/>
<property name="verplicht" column="Verplicht"/>
</class>
</hibernate-mapping>

Does anyone know how to work with this "uniqueidentifier"?

Kind Regards,
Martijn van Hagen

The hibernate documentation tells us to do it like this:





You can use native for identity columns with auto increment

Good Luck

Sorry did not read this correct this one is for identity.....

Try:

<id name="id" column="ID">
<generator class="native"/>
</id>

Sorry for wrong post

Try:

<id name="id" column="ID">
<generator class="uuid"/>
</id>

SQLServers convert to strings, not longs. Change your POJO so that the ID is String.

Oops.

^SQLServers^SQLServer uniqueidentifiers