Hi,
I'm trying to use Hibernate to access a table I created into a local MySQL 5 instance. I've tried various diferent HQL statements, even a simple "from SakaiEvent sakaievent", but all of them end in the same error. I also tried all possible MySQL dialects listed here:
http://www.hibernate.org/hib_docs/v3/re ... l-dialects plus org.hibernate.dialect.MySQL5Dialect, all with the same result. The only way I could access the base was using a SQL query.
Please note that for testing purposes I either comment the HQL query section or the SQL query one before compiling and running. I don't know if it is of any use, but I'm using Eclipse Ganymede and the mapping and cfg file were created via Hibernate Tools 3.2.4 Beta plugins.
Hibernate version: 3.3.1.GA
Name and version of the database you are using: MySQL 5.1.31 - community
Mapping documents:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 01/03/2009 12:40:28 by Hibernate Tools 3.2.2.GA -->
<hibernate-mapping>
<class name="databaseaccess.pojos.SakaiEvent" table="sakai_event" catalog="sakai_tidia">
<id name="eventId" type="long">
<column name="EVENT_ID" />
<generator class="identity" />
</id>
<property name="eventDate" type="timestamp">
<column name="EVENT_DATE" length="19" />
</property>
<property name="event" type="string">
<column name="EVENT" length="32" />
</property>
<property name="ref" type="string">
<column name="REF" />
</property>
<property name="sessionId" type="string">
<column name="SESSION_ID" length="163" />
</property>
<property name="eventCode" type="string">
<column name="EVENT_CODE" length="1" />
</property>
</class>
</hibernate-mapping>
Code between sessionFactory.openSession() and session.close():
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
// Query that results in error (idValue is determined a bit before this //code, it's a long.)
Query query = session.createQuery(
"select sakaiEvent " +
"from " +
"SakaiEvent sakaiEvent " +
"where " +
"sakaiEvent.eventId = :idVal");
query.setLong("idVal", idValue);
// Query that Works (EVENT_ID is just a ramdom number I came up with //for testing purposes)
// Query query = session.createSQLQuery(
// "SELECT sevent.EVENT_ID, " +
// "sevent.EVENT_DATE, " +
// "sevent.EVENT, " +
// "sevent.REF, " +
// "sevent.SESSION_ID, " +
// "sevent.EVENT_CODE " +
// "FROM Sakai_Event sevent " +
// "WHERE sevent.EVENT_ID = '200000'"
// ).addEntity(SakaiEvent.class);
List result = query.list();
session.getTransaction().commit();
session.close();
Full stack trace of any exception that occurs:
org.hibernate.exception.SQLGrammarException: could not execute query
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.loader.Loader.doList(Loader.java:2231)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2125)
at org.hibernate.loader.Loader.list(Loader.java:2120)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:361)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1148)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
at control.StartHere.testOne(StartHere.java:45)
at control.StartHere.main(StartHere.java:17)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.sakai_event sakaievent0_ where sakaievent0_.EVENT_ID=25' at line 1
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.Util.getInstance(Util.java:381)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3515)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3447)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2554)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1761)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1912)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1808)
at org.hibernate.loader.Loader.doQuery(Loader.java:697)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
at org.hibernate.loader.Loader.doList(Loader.java:2228)
... 9 more
The generated SQL (show_sql=true):
Hibernate: select sakaievent0_.EVENT_ID as EVENT1_0_, sakaievent0_.EVENT_DATE as EVENT2_0_, sakaievent0_.EVENT as EVENT0_, sakaievent0_.REF as REF0_, sakaievent0_.SESSION_ID as SESSION5_0_, sakaievent0_.EVENT_CODE as EVENT6_0_ from sakai_tidia.sakai_tidia.sakai_event sakaievent0_ where sakaievent0_.EVENT_ID=?
NOTE:
When I use the SakaiEventHome generated by the Tools through the following code snippet:
SakaiEventHome home = new SakaiEventHome();
SakaiEvent evento = home.findById(25);
It ends in the same exeception as the code above.
So, am I missing something?
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