BLOB problem in forms 6i

Hi All,
i have a problem with BLOB data type. i just create a base table block thru wizard. i have one BLOB field in my table. i use GET_FILE_NAME and READ_IMAGE_FILE to store image in base table block field and press commit. it shows 1 transaction completed. when i query record it cannot shows any record. i checked it from SQL/PLUS, it shows no record in table (select count(*) from mytable) . when i use LONG RAW type its work. i'm using ORACLE 9i database and forms 6i rel 2.
plz tell me what i can do in this regard.
Thanks in advance
Shakeel

Hello there,
i have created a table(with 3 columns) one blob column, i commit one record as you have said and i saved it.
(i) The sql don't display
(ii) On forms it is showing
(iii) i have set item property (image), if you set any other accept except image or oracle defined then it will not display.
with best regards,
[email protected]

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MODULE_NO NUMBER(10),
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DOC_DETAIL_SR_NO NUMBER(10),
DOC_MAS_SR_NO NUMBER(10),
DATE_OF_INSERT DATE,
ACTUAL_DOC BFILE,
COMMENTS VARCHAR2(500));
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public final static String s_userName = "scott";
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import java.sql.*;
import oracle.sql.*;
import oracle.jdbc.driver.*;
import java.util.*;
import java.util.Date;
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Connection m_connection; //Database Connection Object
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String s_blobvariable = p_doc_name;
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}catch (Exception e){}
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if (p_doc_type.equals("html")| |p_doc_type.equals("htm"))
try{
p = r.exec( "C:\\Program Files\\Internet Explorer\\Iexplore.EXE " + p_doc_name);
//repaint();
p.waitFor();
catch(Exception ex)
ex.printStackTrace();
System.out.println(ex);
System.out.println(ex.getMessage());
if(p_doc_type.equals("txt")| | p_doc_type.equals("sql")| | p_doc_type.equals("java"))
try
p = r.exec( "C:\\WINDOWS\\notepad.EXE " + p_doc_name); p.waitFor();
catch(Exception ex)
ex.printStackTrace();
System.out.println(ex);
System.out.println(ex.getMessage());
} // end of txt , sql , java if
if(p_doc_type.equals("xls"))
try
p = r.exec( "C:\\Program Files\\Microsoft Office\\Office\\excel.EXE " + p_doc_name);p.waitFor();
catch(Exception ex)
ex.printStackTrace();
System.out.println(ex);
System.out.println(ex.getMessage());
} // end of xls if
if(p_doc_type.equals("fmb"))
try
p = r.exec( "C:\\Program Files\\Accessories\\wordpad.exe " + p_doc_name);p.waitFor();
catch(Exception ex)
ex.printStackTrace();
System.out.println(ex);
System.out.println(ex.getMessage());
} // end of fmb if
if(p_doc_type.equals("doc"))
try
p = r.exec( "C:\\Program Files\\Accessories\\wordpad.exe " + p_doc_name);p.waitFor();
catch(Exception ex)
ex.printStackTrace();
System.out.println(ex);
System.out.println(ex.getMessage());
} // end of doc if
if(p_doc_type.equals("mpp"))
try
p = r.exec( "C:\\Program Files\\Accessories\\wordpad.exe " + p_doc_name);p.waitFor();
catch(Exception ex)
ex.printStackTrace();
System.out.println(ex);
System.out.println(ex.getMessage());
} // end of mpp if
//Here you can write a statement for deleting the file in the root directory once the file is opened using any editor
}//end of method
}//This is the class closing
* This method is called when a row is selected from the combo.
* It checks if there exists data in DOC_DETAIL for the selected
* file. If there exists data, it calls drawBLOB and writeCLOB to
* display the data
/*public void fileSelected(String p_doc_mas_sr_no,String p_doc_name,String p_doc_type) {
try {
System.out.println("Retrieving LOB details for selected file..");
// Create a SQL statement
Statement l_stmt = m_connection.createStatement();
// Query DOC_DETAILS for the selected file
java.sql.ResultSet l_lobDetails = l_stmt.executeQuery(
"SELECT ACTUAL_DOC FROM DOC_DETAILS "+
"WHERE DOC_MAS_SR_NO='"+p_doc_mas_sr_no+"'");
// Check if LOB columns exist
if (l_lobDetails.next()) {
// LOB details exist
// Display airport map and suggestion book (LOB details)
drawBLOB(l_lobDetails.getBlob(1),p_doc_name,p_doc_type);
//lobs.drawBLOB(((OracleResultSet)l_lobDetails).getBLOB(1),p_doc_name,p_doc_type);
//Should this be like this
System.out.println("Done retrieving and displaying LOB details");
} else {
// No LOB details
// m_GUI.m_loadButton.setEnabled(true);
//TO BE CHECKED OUT LATER m_loadButton This is a button in the form
System.out.println("No airport map and suggestion book exist for selected airport");
System.out.println("\nPress <Load Sample2 Files> to load LOB details");
l_lobDetails.close();
l_stmt.close();
} catch (Exception ex) { // Trap SQL errors
System.out.println("Error retrieving LOB Details for the selected airport");
System.out.println(ex.toString());

You are probably better off using BLOBs rather than BFILEs. The main reason for this is that with BLOBs data integrity between file and its meta data in the database are managed and protected by the RDBMS. BFILEs are useful for legacy systems where the files already exist in some form of meaningful and managed structure that needs to be preserved.
There is a down side to BLOBs and that is performance - BLOBs are relatively slow to load into the database. However, its not too bad and the performance of extracting BLOBs out from the database is quite reasonable the bottleneck is more likely to be your LAN.
In order to use BLOBs it is important to have the right class libraries involved. For BLOBs you must use the classes12.zip (supplied with the database) for JDBC2 support and furthermore put this class high up the list of class libraries if you do not you may find that your code compiles but raises a runtime exception about invalid data types; this is because the wrong definition of the Blob class is being picked up.
Assuming that you are using BLOBs then the following describes the techniques for storing files as BLOBs in an Oracle database.
LOADING BLOBS
Assuming that you have a table with a BLOB column in it then to load a BLOB you must first create the record containing the BLOB by inserting a row into your table with the value of the BLOB column set to EMPTY_BLOB( ) (PL/SQL built in):
INSERT INTO tablex( col1, col2, colBLOB )
VALUES( val1, val2, EMPTY_BLOB() )
Then you must row lock this record and obtain the LOB locator for the BLOB just created:
stmt = connection.createStatement();
query = "SELECT colBLOB FROM tablex WHERE ... FOR UPDATE OF colBLOB";
ResultSet lockLOBSet = stmt.executeQuery(query);
At this point you should be able to use lockLOBSet.getBlob(1) to create a binary stream to load the BLOB directly into the database. Under Java Developer 2 I could never get this to work and havent tried since with Java Developer 3. Instead I used the PL/SQL DBMS_LOB package and did it using JDBC; this assumes that the file has been loaded into a buffer binaryFile and note that the maximum chunk size that dbms_lob.write can be called with is 32K:
blobLoc = lockLOBSet.getBlob(1);
while(amountWritten < fileSize)
if ((amountWritten + writeAmount) <= fileSize)
writeAmount = 32000;
else
writeAmount = fileSize - amountWritten;
System.arraycopy(binaryFile, amountWritten, buffer, 0, writeAmount);
CallableStatement cstmt =
connection.prepareCall("{call dbms_lob.write(?, ?, ?, ?)}");
cstmt.setBlob(1, blobLoc);
cstmt.setLong(2, writeAmount);
cstmt.setLong(3, amountWritten + 1);
cstmt.setBytes(4, buffer);
cstmt.execute();
cstmt.close();
amountWritten = amountWritten + writeAmount;
EXTRACTING BLOBS
Binary streams do work when it comes to reading BLOBs out of the database so things are a whole lot simpler probably worth trying it with loading BLOBs now as well.
ResultSet queryLOBSet = statement.executeQuery(query);
if(queryLOBSet.next())
lobSize = queryLOBSet.getInt(1);
blobLoc = queryLOBSet.getBlob(2);
BufferedInputStream bi;
blobBuffer = new byte[lobSize];
bi = new BufferedInputStream(blobLoc.getBinaryStream());
amountRead = bi.read(blobBuffer);
bi.close();
Regards,
Bob
null

BLOB problem in forms 6i

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