Error writing BLOB to a table

Question

I have the following code:
import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.FileInputStream; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import oracle.jdbc.pool.OracleDataSource; import java.sql.PreparedStatement; public class InsertBlobData {   public InsertBlobData()   {   }   public static void main(String[] args)   {   try   { OracleDataSource ods = new OracleDataSource();                 String url = "jdbc:oracle:thin:@//<hostname>:1521/<SID>";                 ods.setURL(url);                 ods.setUser("<user id>");                 ods.setPassword("<password>");                 Connection conn = ods.getConnection();   PreparedStatement insertStmt = conn.prepareStatement("insert into test_blob values (?,?)");     byte [] b = new byte[1024];     ByteArrayOutputStream b1 = new ByteArrayOutputStream();     FileInputStream f1 = new FileInputStream("test.doc"); int i;   do   {       i = f1.read(b);       b1.write(b);     } while( i!= -1);     ByteArrayInputStream bais = new ByteArrayInputStream(b1.toByteArray());     int len = bais.available();     System.out.println("Length of Blob data to be inserted: " + len);     insertStmt.setInt(1, len);     insertStmt.setBinaryStream(2, bais, bais.available());     int result = insertStmt.executeUpdate();     System.out.println("\nBlob successfully inserted");     conn.commit();   }   catch (Exception e)   {     System.out.println("--- Error occurred --- ");     e.printStackTrace();   } } }
underline Other information: underline
My table has the following structure:
test_blob
(col1 number,
col2 blob)
Database
==============
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Test
With the Partitioning, OLAP and Data Mining options
JDBC
==============
Oracle JDBC driver: 9.2.0.6.0
JVM
===
IBM Corporation
Classic VM
1.4.2
underlineI am getting the following error:_underline_
java InsertBlobData
Length of Blob data to be inserted: 30720
--- Error occurred ---
java.sql.SQLException: ORA-01460: unimplemented or unreasonable conversion requested
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:589)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1972)
at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteFetch(TTC7Protocol.java:1119)
at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleStatement.java:2185)
at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStatement.java:2059)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2976)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:656)
at InsertBlobData.main(InsertBlobData.java:49)
Looks like it is able to read the length of the test.doc. However, I don't understand what it is trying to convert while inserting and why.
Can any one help me out?
Thanks,
Chiru

Answer 1

Use a returning into variable on your insert statement, like:
INSERT INTO some_table VALUES ( empty_blob(), ... ) RETURNING blob_column_value INTO local_variable.
The empty_blob() call initializes the object, and the RETURNING clause provides you with a handle to stream in the data.