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 Post subject: Creating a BLOB in Oracle
PostPosted: Fri Oct 10, 2003 12:16 pm 
Newbie

Joined: Thu Sep 04, 2003 9:25 am
Posts: 1
I'm trying to use hibernate to read / write blobs in a Oracle9 database.

The mappings is very simple:

Code:
<class
    name="TBlobs"
    table="TBLOBS"
    dynamic-update="true">

...
    <property
        name="data"
        type="blob"
        column="DATA"/>

...


The corresponding java class looks like
Code:
public class TBlobs implements Serializable {

...

   private Blob fData;

   public Blob getData() {
      return fData;
   }

   public void setData(Blob data) {
      fData = data;
   }

...



Nothing fancy in the hibernate configuration (I tried with and without hibernate.jdbc.use_streams_for_binary ) with the following parameters:
Code:
        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="connection.url">jdbc:oracle:thin:...
        <property name="dialect">net.sf.hibernate.dialect.Oracle9Dialect</property>


My code (to insert a blob) looks like :

Code:
...
      Session sess = factory.openSession();
      Transaction t = sess.beginTransaction();
      TBlobs b = new TBlobs();
      Blob blob = Hibernate.createBlob(stream);
      b.setData(blob);
      sess.save(b);
      t.commit();


At runtime, I got the following error:

2969 [main] WARN util.JDBCExceptionReporter - SQL Error: 17090, SQLState: null
2969 [main] ERROR util.JDBCExceptionReporter - operation not allowed: streams type cannot be used in batching
2984 [main] ERROR util.JDBCExceptionReporter - Could not synchronize database state with session

The SQL generated looks like:
Hibernate: insert into TBLOBS (NAME, DATA, ID) values (?, ?, ?)


What am I doing wrong here?


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 Post subject:
PostPosted: Wed Nov 26, 2003 11:46 am 
Beginner
Beginner

Joined: Wed Oct 08, 2003 6:34 am
Posts: 29
I have the same problem, do you have any solution for this?

Regards
Jose


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 Post subject: Same Problem
PostPosted: Mon Dec 01, 2003 6:07 pm 
Newbie

Joined: Wed Nov 05, 2003 11:35 pm
Posts: 1
I also have the same problem. Did anybody find a solution?


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 Post subject:
PostPosted: Mon Dec 01, 2003 7:33 pm 
Hibernate Team
Hibernate Team

Joined: Tue Aug 26, 2003 12:50 pm
Posts: 5130
Location: Melbourne, Australia
Try disabling JDBC batch updates.


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 Post subject: i have the same question too!
PostPosted: Sun Apr 25, 2004 5:40 am 
Regular
Regular

Joined: Tue Dec 30, 2003 2:35 am
Posts: 85
disabling JDBC batch updates

but how can i disable the batch of updates!!!!

thanks a lot!


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 Post subject:
PostPosted: Sun Apr 25, 2004 2:59 pm 
Hibernate Team
Hibernate Team

Joined: Sun Sep 14, 2003 3:54 am
Posts: 7256
Location: Paris, France
read the doc.
hibernate.jdbc.batch_size=0

_________________
Emmanuel


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 Post subject:
PostPosted: Mon Apr 26, 2004 4:19 am 
Newbie

Joined: Sun Mar 14, 2004 1:43 am
Posts: 2
emmanuel wrote:
read the doc.
hibernate.jdbc.batch_size=0

that's not work


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 Post subject:
PostPosted: Tue Sep 21, 2004 2:03 pm 
Newbie

Joined: Mon Aug 02, 2004 12:11 pm
Posts: 10
Location: Mexico D.F.
You put <property name="hibernate.jdbc.batch_size">0</property> in the hibernate.cfg.xml file and it's work!, but i have a doubt if oracle really save this data type, because when i call the method getBlob() for example, it's give me null .


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 Post subject:
PostPosted: Tue Sep 21, 2004 2:25 pm 
Newbie

Joined: Fri Aug 27, 2004 5:36 pm
Posts: 16
Location: Pittsburgh
read this

http://www.hibernate.org/56.html


It works !


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 Post subject: Problem with BLOB
PostPosted: Thu Oct 28, 2004 2:38 pm 
Newbie

Joined: Mon Aug 02, 2004 12:11 pm
Posts: 10
Location: Mexico D.F.
gavin wrote:
Try disabling JDBC batch updates.


Hi Gavin, i so sorry with a problem and my intention is not to clear your time, but i have some days and i can not resolve this problem.

The message that hibernate rise is this :

hibernate java.sql.SQLException: Data size bigger than max size for this type: 4101120

part of de code is this :

ArchivosCampaniaValue objCampValue2 = (ArchivosCampaniaValue) iter.next();
TmkCampaniaArchivo objCampArch = new TmkCampaniaArchivo();
TmkCampaniaArchivoPK objCampArchPK = new TmkCampaniaArchivoPK();
objCampArchPK.setFlCampania(objCampania.getFlCampania());
objCampArchPK.setNbArchivo(objCampValue2.getNombreArchivoCampania());
objCampArch.setId(objCampArchPK);
objCampArch.setClTipoArchivo(new Integer(objCampValue2.getTipoArchivo()));
objCampArch.setArchivo(Hibernate.createBlob(data));
objCampArch.setClUsrModifico(objCampania.getClUsrModifico());
objCampArch.setFeUltmod(new Date());
//crear el elemento de tipo campa


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 Post subject:
PostPosted: Fri Oct 29, 2004 11:59 am 
Regular
Regular

Joined: Tue Sep 28, 2004 6:34 pm
Posts: 50
did you try:
http://www.hibernate.org/56.html

L.


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 Post subject:
PostPosted: Fri Oct 29, 2004 1:00 pm 
Newbie

Joined: Mon Feb 09, 2004 11:14 am
Posts: 16
We had great difficulty getting this to work. Below are is some of our code we use to insert a BLOB into Oracle. Hope this helps... I am hoping someone posts a more elegant solution.
if (HibernateAbstractSessionUtil.isOracleDB()){
//To bypass a bug (in the oracle driver) when the blob size is more that 4k,
//first insert a single byte blob, then
//get a output stream to that blob and write the actual data
//this also needs the special insertBlob method in the dao that upgrades the LockMode
stagingTransaction.setTransactionDetail(Hibernate.createBlob(new byte[1]));

dao.insertBlob(stagingTransaction);

//Couldn't use oracle.sql.BLOB when invoked with in the container (ClassCastException) so use
//the oracle blob from Weblogic 8.1 Oracle extensions
//TODO: refactor vendor specific code (Weblogic/Oracle) to a seperate package
weblogic.jdbc.vendor.oracle.OracleThinBlob blob = (weblogic.jdbc.vendor.oracle.OracleThinBlob) stagingTransaction.getTransactionDetail();
OutputStream os = blob.getBinaryOutputStream();
os.write(bos.toByteArray());
os.flush();
os.close();
} else {
stagingTransaction.setTransactionDetail(Hibernate.createBlob(bos.toByteArray()));
dao.insertBlob(stagingTransaction);
}


public void insertBlob(Persistent persistent) throws PersistenceException {
try {
Session session = HibernateAbstractSessionUtil.getCurrentSession();
doInsert(persistent, session);
session.flush();
session.refresh(persistent, LockMode.UPGRADE); //grabs an Oracle BLOB
} catch (PropertyValueException pve) {
logger.error(ErrorCodes.SP00146_INVALID_MISSING_NULL_DATA, pve,
getClassPropertyName(pve.getPersistentClass(), pve.getPropertyName()));
throw new PersistenceException();
} catch (Exception e) {
logger.error(ErrorCodes.SP00068_PERSISTENCE_ERROR, e, "Exception occurred inserting persistent object : " + persistent);
throw new PersistenceException();
}

}


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 Post subject: Solution
PostPosted: Mon Mar 24, 2008 9:02 am 
Newbie

Joined: Mon Mar 24, 2008 8:46 am
Posts: 1
I just replaced the oracle 9.2 driver with jbdc oracle 10 driver and the problem was solved.


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 Post subject: Re: Creating a BLOB in Oracle
PostPosted: Tue Oct 13, 2009 10:38 am 
Newbie

Joined: Thu Sep 24, 2009 11:49 am
Posts: 8
USE THE FOLLOWING WAY, IT WILL WORK
-----------------------------------------

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="contact.Picture" table="PICTURE">
<id name="id" type="integer" column="ID" >
<generator class="assigned"/>
</id>
<property name="image" column="IMAGE" type="java.sql.Blob"/>
</class>
</hibernate-mapping>


-------------------------------------------


package contact;

import java.util.*;
import java.sql.Blob;
public class Picture{

private int id;
private Blob image;


public Blob getImage() {
return this.image;
}
public void setImage(Blob image) {
this.image = image;
}


/**
* @return ID Returns ID
*/
public int getId() {
return id;
}

/**
* @param l Sets the ID
*/
public void setId(int l) {
id = l;
}


}

----------------------------------------
package contact;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.Transaction;
import org.hibernate.Hibernate;
import java.io.*;
import java.util.*;
import java.sql.Blob;


public class First_Insert_Blob {
public static void main(String[] args) {
Session session = null;
FileInputStream fs=null;
File file=null;

try{
file = new File("D:\\xyz.gif");
fs = new FileInputStream(file);
Blob photo=Hibernate.createBlob(fs);
SessionFactory sessionFactory = new
Configuration().configure().buildSessionFactory();
session =sessionFactory.openSession();
Transaction tx = session.beginTransaction();
System.out.println("Inserting Record");
Picture picture = new Picture();
picture.setId(2);
picture.setImage(photo);
session.save(picture);
tx.commit();
System.out.println("Done");
}catch(Exception e){
System.out.println(e.getMessage());
}finally{
// Actual contact insertion will happen at this step
session.flush();
session.close();

}

}
}


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 Post subject: Re: Creating a BLOB in Oracle
PostPosted: Fri Feb 26, 2010 11:37 am 
Newbie

Joined: Wed Nov 25, 2009 11:35 am
Posts: 17
Follow code works for me:

Code:
public void nullSafeSet(PreparedStatement st, Object value, int index)  throws HibernateException, SQLException {
     ...
      CallableStatement cs = st.getConnection().prepareCall("{ call dbms_lob.createTemporary(?, TRUE) }");
      cs.registerOutParameter(1, java.sql.Types.CLOB);
      cs.execute();
      java.sql.Clob c = cs.getClob(1);
      ((oracle.sql.CLOB) c).putString(1, (String)value);
      st.setClob(index, c);
     ...

- appears to be independent on what kind of proxy is involved.

Hopefuly someone will find it useful.


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