Oracle.sql.BLOB.freeTemporary() is not freeing TEMP space in the database
Hi Folks,
We are using oracle.sql.BLOB to store some file information into the database.
Allocation of the temp space is done as below
BLOB blob=BLOB.createTemporary(conn, false, BLOB.DURATION_SESSION); // this results in the usage of TEMP space from database
And subsequent release is done as below
blob.freeTemporary(); // this should have release the space from the database.
This is on Oracle 10g, Java 1.6, ojdbc6.jar There are no exceptions. Even a simple program results in the same.
Anybody faced something similar? Any pointers would be really appreciated.
Thanks,
Deva
Edited by: user10728663 on Oct 11, 2011 5:33 AM
Thanks a lot for the information.
Memory is fine. And I am able to reproduce this within the scope of a simple example as well.
Would you have any reference to the thread which had earlier reported this as a bug. I tried a reasonable amount of search in the forum, but no success.
Thanks very much for any pointers.
Similar Messages
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Is it possible to serialize a user created object with an oracle.sql.BLOB?
Is this possible? Cause I'm getting a WSDL Exception that the oracle.sql.BLOB is not a java bean. So how do I make it a java bean? What data type should I use?
here is the object that was created.
import java.io.Serializable;
public class DiagramsObj implements Serializable {
private int galleyDiagramId = -1;
oracle.sql.BLOB galleyDiagramBlob = null;
private String galleyName = null;
/** SET THE VALUES TO THE OBJECT */
public void setGalleyDiagramId(int newGalleyDiagramId) {
galleyDiagramId = newGalleyDiagramId;
public int getGalleyDiagramId() {
return galleyDiagramId;
public void setGalleyDiagramBlob(oracle.sql.BLOB newGalleyDiagramBlob) {
galleyDiagramBlob = newGalleyDiagramBlob;
public oracle.sql.BLOB getGalleyDiagramBlob() {
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After WLS10.3 migration getBinaryStream in Oracle.sql.BLOB not reading data
Please some one help me. After the 10.3 migration, the values in CSV file(as BLOB in DATABASE) is not read by getBinaryStream method. It returns 0. It was working before. Please find below the code:
import oracle.jdbc.OracleResultSet;
import oracle.sql.BLOB;
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InputStream instream=null;
try
Statement stmt = connection.createStatement ();
ResultSet resSet = stmt.executeQuery
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resSet.next();
System.out.println("after query");
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blob = ((OracleResultSet)resSet).getBLOB(1);
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Below is code from Another class which call the above method RetriveISfromBlob:
InputStream inputstream = fileDataDAO.RetriveISfromBlob(batchId);
System.out.println("afterfileread");
CommaFileInputStream reader = new CommaFileInputStream(inputstream);
reader.setIgnoreFirstLine(true);
CommaRecord comma = reader.getCommaRecord();
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NOTE: When I use Ojdbc14.jar only the above code returns 0. When i use Ojdbc_6g.jar it throws NULL POINTER EXCEPTION because the code was written like import oracle.jdbc.driver.OracleResultSet; But in all cases the data in BLOB was not read
Edited by: 833987 on Feb 4, 2011 9:07 AMHi,
The problems 1, 2 and 3 under the heading Issue 2 should be fixed in the Early Adopter release 3.1 EA3, which is now available.
David -
NullPointerException at oracle.sql.BLOB.createTemporary(BLOB.java:590)
Hi,
I seldom use the BLOB. Here is the coding that creates a BLOB.
private BLOB getBlob(byte[] str, Connection con) throws SQLException, IOException {
BLOB blob = BLOB.createTemporary(con, true, BLOB.DURATION_SESSION);
blob.open(BLOB.MODE_READWRITE);
OutputStream writer = blob.getBinaryOutputStream();
writer.write(str);
writer.flush();
writer.close();
blob.close();
return blob;
After inserting this BLOB into database table via ojdbc, BLOB.freeTemporary() is called.
BLOB blob = getBlob(compressedClaim,connStore);
rsImagePstmt.setObject(4,blob);
rsImagePstmt.executeUpdate();
BLOB.freeTemporary( blob );
Sometimes it's running ok and finished properly. Sometimes I got the following exception after running 2.5 hours.
Thanks a lot for any suggestion and help. We use oracle 10.2 and java1.4 library here.
> Exception: java.lang.NullPointerException
> at oracle.jdbc.driver.T2CConnection.checkError(T2CConnection.java:669)
> at oracle.jdbc.driver.T2CConnection.checkError(T2CConnection.java:602)
> at oracle.jdbc.driver.T2CConnection.createTemporaryBlob(T2CConnection.java:2039)
> at oracle.sql.BLOB.createTemporary(BLOB.java:590)
If I ran in the debug mode, I got the following errors after 2.5 hours:
An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : EXCEPTION_ACCESS_VIOLATION (0xc0000005) occurred at PC=0x62F0BCF4
Function=Java_oracle_jdbc_driver_T2CStatement_t2cFetchDmlReturnParams+0x594
Library=C:\oracle\product\10.2.0\client\BIN\ocijdbc10.dll
Current Java thread:
at oracle.jdbc.driver.T2CConnection.lobCreateTemporary(Native Method)
at oracle.jdbc.driver.T2CConnection.createTemporaryBlob(T2CConnection.java:2039)
at oracle.sql.BLOB.createTemporary(BLOB.java:590)
at com.viant.consumer.impl.RateSheetConsumer.getBlob(RateSheetConsumer.java:386)
at com.viant.consumer.impl.RateSheetConsumer.finishRateSheet(RateSheetConsumer.java:293)
at com.viant.consumer.impl.RateSheetConsumer.run(RateSheetConsumer.java:156)
at java.lang.Thread.run(Thread.java:534)
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Heap at VM Abort:
Heap
def new generation total 4608K, used 291K [0x10010000, 0x10510000, 0x12770000)
eden space 4096K, 5% used [0x10010000, 0x10046aa0, 0x10410000)
from space 512K, 14% used [0x10490000, 0x104a2208, 0x10510000)
to space 512K, 0% used [0x10410000, 0x10410000, 0x10490000)
tenured generation total 60544K, used 56437K [0x12770000, 0x16290000, 0x30010000)
the space 60544K, 93% used [0x12770000, 0x15e8d4b8, 0x15e8d600, 0x16290000)
compacting perm gen total 12800K, used 12682K [0x30010000, 0x30c90000, 0x34010000)
the space 12800K, 99% used [0x30010000, 0x30c72900, 0x30c72a00, 0x30c90000)
Local Time = Thu Oct 17 11:29:35 2013
Elapsed Time = 9003
# The exception above was detected in native code outside the VMHi!
It seems you can do this:
try {
conn = new OracleDriver().defaultConnection(); graphblob = oracle.sql.BLOB.createTemporary(conn, false,oracle.sql.BLOB.DURATION_CALL); // must init
System.out.println("Blob is init");
} catch ( java.sql.SQLException sEx ) {
throw new RuntimeException ("No connection", sEx);
http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:1285601748584
http://www.unix.org.ua/orelly/oracle/guide8i/ch09_08.htm
/Bjoern -
ClassCastException in oracle.sql.BLOB.createTemporary
Hi,
I'm having a ClassCastException problem using the method oracle.sql.BLOB.createTemporary while trying to store a BLOB value (JDBC classes12.jar). The problem is quite clear - if I use the method with a dedicated database connection that specifies the driver as oracle.jdbc.driver.OracleDriver there is no problem - if I use it with an Orion datasource shipped with Oracle IAS10g it gives me a ClassCastException. I imagine that somewhere in the code of this method there is a cast of the underlying connection leading to the ClassCastException when used in conjunction with the Orion datasource. The code to save the BLOB is as follows:
oracle.sql.BLOB blob = oracle.sql.BLOB.createTemporary(st.getConnection(), false,
oracle.sql.BLOB.DURATION_SESSION);
blob.open(BLOB.MODE_READWRITE);
OutputStream out = blob.getBinaryOutputStream();
try {
out.write((byte[])value);
out.flush();
out.close();
} catch (IOException e) {
throw new SQLException("failed write to blob" + e.getMessage());
blob.close();
((oracle.jdbc.OraclePreparedStatement)(st)).setBLOB(index, blob);
My questions are:
(1) is it possibile to save a BLOB type with a different version of Oracle JDBC without having to rely on the Oracle specific implementation of the JDBC interface (the cast of the PreparedStatement to oracle.jdbc.OraclePreparedStatement is quite ugly and not very portable!).
(2) if not, then how can I get this code to work with the datasource implementation for Oracle IAS.
thanks in advance for any help.
Dara.If you are using OCI driver, you may check whether using thin driver would avoid ClassCastException.
-
I am trying to extract a file name and its data from the database. The file data is stored as HUGEBLOB in the table. The file contains data which I found by downloading it directly from table using TOAD. However when I try to fetch the data throughh Java code :
Blob file = rs.getBlob("file_data");
I am getting null pointer in the next line which is:
InputStream inputStream = ((oracle.sql.BLOB)file).getBinaryStream();
Can anyone suggest why it is giving null exception and what is the solution to it.Have a go at [url http://www.oracle.com/technology/sample_code/tech/java/sqlj_jdbc/files/advanced/LOBSample/LOBSample.java.html]this link. Note the drawBlob method and how it 'gets' the BLOB out.
-
Oracle.sql.BLOB.setBinaryStream() throws UnsupportedFeatureException
Does anyone know why oracle.sql.BLOB.setBinaryStream(long pos) throws an UnsupportedFeatureException? It seesm to me that if the method were rewritten as:
public OutputStream setBinaryStream(long pos) throws SQLException {
return getDBAccess().newOutputStream(this, getBufferSize(), pos);
... then there would be no reason to throw an exception.
Ideas?
- DavidHi Dave,
I ran into this when I did rs.getBlob(1).setBinaryStream(0) using the ojdbc1_4 driver (without casting to oracle.sql.BLOB). Someone pointed out that I needed to select the BLOB column FOR UPDATE. I did this and now I am getting ORA-01002: fetch out of sequence.
Not sure if I have helped you any...still digging around for the meaning of ORA-01002
Raj -
Oracle.sql.BLOB.setBytes() Error
Hi,
I'm trying to use Java to put a large array of bytes into a BLOB table column. I'm first inserting the new row with an empty_blob() and then calling select <blob_column> ... for update and getting the oracle.sql.BLOB out of the resultset. I then try to call setBytes() on this BLOB and I get the following exception:
java.sql.SQLException: Invalid argument(s) in call: putBytes()
at oracle.jdbc.driver.T4CConnection.putBytes(T4CConnection.java:2440)
at oracle.sql.BLOB.setBytes(BLOB.java:916)
I'm using Oracle XE (oracle-xe-11.2.0-1.0.x86_64.rpm), the latest ojdbc6.jar, and jboss 4.2.2 on CentOS.
A code snippet of what I'm doing:
... stmt = con.prepareStatement("select blob_column from blob_table where id=? for update"); stmt.setLong(1, Id); ResultSet rs = stmt.executeQuery(); try { if (rs.next()) { WrappedResultSet wrappedRs = (WrappedResultSet)rs; BLOB oracleBlob = ((OracleResultSet)wrappedRs.getUnderlyingResultSet()).getBLOB(1); if(oracleBlob != null) { byte[] bytes = getData(); int pos = 0; long bytesLeft = bytes.length; log.debug("Attempting to write " + bytes.length + " bytes to BLOB"); while(bytesLeft > 0) { int bytesWritten = oracleBlob.setBytes(pos, bytes, pos, MAXBUFSIZE); log.debug("Wrote " + bytesWritten + " bytes to BLOB"); bytesLeft -= bytesWritten; pos += bytesWritten; } } } } finally { rs.close(); } ...
Any help would be greatly appreciated!Welcome to the forum!
Thanks for posting the code and the DB, JDBC and app server versions. Those are what is needed to help.
>
java.sql.SQLException: Invalid argument(s) in call: putBytes()
while(bytesLeft > 0) {
int bytesWritten = oracleBlob.setBytes(pos, bytes, pos, MAXBUFSIZE);
log.debug("Wrote " + bytesWritten + " bytes to BLOB");
bytesLeft -= bytesWritten;
pos += bytesWritten;That 'Invalid argument . . .' was your clue to look at the ARGUMENT values you are passing to the method call. You could have easily done that by displaying the values to the console each time in the loop BEFORE the method call.
This is the signature of that method in the Javadocs (edited to highlight the relevant parts):
http://docs.oracle.com/javase/6/docs/api/java/sql/Blob.html#setBytes(long, byte[])
>
int setBytes(long pos, byte[] bytes, int offset, int len) throws SQLException
Writing starts at position pos in the BLOB value; len bytes from the given byte array are written.
Parameters:
pos - the position in the BLOB object at which to start writing; the first position is 1
bytes - the array of bytes to be written to this BLOB object
offset - the offset into the array bytes at which to start reading the bytes to be set
len - the number of bytes to be written to the BLOB value from the array of bytes bytes
>
This is what you are passing for 'len': MAXBUFSIZE
Most likely that value is LARGER than the 'byte array' that you are using; perhaps it is even the MAX int size.
That value is invalid.
In addition each time thru the loop you increment 'pos' and use 'pos' as the 'offset' into your array. Then you once again use MAXBUFSIZE as the number of bytes to write from your array. Even if MAXBUFSIZE is less than the length of your array at some point it will likely be greater than what is left of the array.
For example, if MAXBUFSIZE is 2 and your array length is 3 the first 'put' will put the first two bytes. Then the second put will use a 'pos' of 2 and try to put 2 more bytes; except there is only one byte left.
Your code updates the entire BLOB value. Best practices are to use the stream methods for reading and writing BLOB/CLOB rather than the 'setBytes' method you are using. The main reason for this is performance: the stream methods write DIRECTLY to the database.
>
Notes:
The stream write methods described in this section write directly to the database when you write to the output stream. You do not need to run an UPDATE to write the data. However, you need to call close or flush to ensure all changes are written. CLOBs and BLOBs are transaction controlled. After writing to either, you must commit the transaction for the changes to be permanent.
>
See 'Reading and Writing BLOB and CLOB Data' in the JDBC Dev Guide
http://docs.oracle.com/cd/B19306_01/java.102/b14355/oralob.htm#i1058044
>
Example: Writing BLOB Data
Use the setBinaryOutputStream method of an oracle.sql.BLOB object to write BLOB data.
The following example reads a vector of data into a byte array, then uses the setBinaryOutputStream method to write an array of character data to a BLOB.
java.io.OutputStream outstream;
// read data into a byte array
byte[] data = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
// write the array of binary data to a BLOB
outstream = ((BLOB)my_blob).setBinaryOutputStream(1L);
outstream.write(data); -
Javax.sql.rowset.serial.SerialBlob cannot be cast to oracle.sql.BLOB
Hi there,
I'm facing this exception.
My code:
final ReportTemplateAttachment rta = new ReportTemplateAttachment();
FileBlob fb = new FileBlob();
fb.setContentType(attachmentDto.getContentType().getValue());
fb.setCreationDate(sysDate);
fb.setCreationUser(userId);
final SerialBlob blob = new SerialBlob(attachmentDto.getFileVal());//it's a byte[]
//SerialBlob is of type javax.sql.rowset.serial.SerialBlob
fb.setFileData(blob);
fb.setName(attachmentDto.getFileName());
fb.setLastUpdateDate(sysDate);
fb.setLastUpdateUser(userId);
fb.setLength(blob.length());
rta.setFileBlob(fb);and the object rta will be inserted into another object.
The variable of interest in FileBlob hbm is defined as follows:
<property name="fileData" type="blob">
<column name="FILE_DATA" />
</property>where the type blob is oracle.sql.BLOB
If I change the oracle.sql.BLOB to javax.sql.rowset.serial.SerialBlob in the hbm, I can insert but when I try to get the blob back I get a deserialize exception so this change is not an option.
but when I save the main Object (a cascade operation) I get the following exception:
org.springframework.jdbc.UncategorizedSQLException:
Hibernate flushing: could not insert: [pt.sc.data.entities.FileBlob];
uncategorized SQLException for SQL
[insert into WP_ADMIN.file_blob (name, content_type, length, file_data, status, creation_user, creation_date, last_update_user, last_update_date, id)
values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)];
SQL state [null];
error code [0];
An SQLException was provoked by the following failure: java.lang.ClassCastException:
javax.sql.rowset.serial.SerialBlob cannot be cast to oracle.sql.BLOB;
nested exception is java.sql.SQLException: An SQLException was provoked by the following failure:
java.lang.ClassCastException: javax.sql.rowset.serial.SerialBlob cannot be cast to oracle.sql.BLOBAny light on the subject?
Thanks in advance,
mleiriaYou don't seem to understand the difference between an object model and a database. Hibernate, being an ORM package, works on the object model and will, based on what you request it to do, generate proper SQL statements to get the database part going. But you shouldn't be thinking about databases when using Hibernate; your main focus is the object model. There is no blob, only binary data. Binary data in Java is generally handled through a byte array.
If you want to think in databases where blobs do exist, you should be using JDBC directly, not Hibernate.
(I'm far from being an expert in Hibernate)I would really suggest taking a few hours and reading through the manual. You don't need to be an expert but you should at least know what kind of tool you're working with. -
Cannot access class oracle.sql.BLOB;
Hi,
I am trying to save a .tif file into Oracle database. When I run the program in JDeveloper I get the following errors:
Error(9,19): cannot access class oracle.sql.BLOB; file oracle\sql\BLOB.class not found
Error(59,29): class BLOB not found in class mypackage1.ImageUpload
package mypackage1;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.*;
import java.util.Properties;
import oracle.sql.BLOB;
Blob imgblob = rs.getBlob(1);
OutputStream blobos = ((BLOB) imgblob).getBinaryOutputStream();
...................Any help is appreciated. ThanksWhat package do I need to include in my classpath for
this. ThanksWhy don't you inspect your JAR files? Do you have WinZip? Open them with it and find the class. -
ClassCast Exception at oracle.sql.BLOB.createTemporary
Hi...
I am facing a problem that when I am trying to open a temporary BLOB, I am getting a ClassCastException. Below is a part of stack trace:
java.lang.ClassCastException: weblogic.jdbc.rmi.SerialConnection_weblogic_jdbc_rmi_internal_ConnectionImpl_weblogic_jdbc_wrapper_PoolConnection_oracle_jdbc_driver_T4CConnection_1034_WLStub
at oracle.sql.BLOB.createTemporary(BLOB.java:684)
I am using Weblogic 10.3.4.0 with Jrocket 1.6 Update 24 in my JAVA_HOME.
Initially I thought this is a JDBC driver problem, then I tried with ojdbc14.jar, ojdbc5.jar, ojdbc6.jar but same result.
With more googling I found some other reasons like:
"Problem which seems to be that despite the fact that method BLOB.createTemporary takes a java.sql.Connection object as a parameter, it only works if the Connection is an oracle.jdbc.driver.OracleConnection object. If it's not an oracle.jdbc.driver.OracleConnection, then I get a ClassCastException. "
I also found out that the problem happens because when I run my code in Weblogic and get the database connection via a DataSource object that I lookup via JNDI, the connection is not a real OracleConnection object, but an object that wraps the real OracleConnection.
Now the question is how do I solve this? In My DataSource->Connection Pool-> I have unchecked the "Wrap Data Types" and it still it doesn't work.
Not using Connection Pool is out of the question as this is not a viable solution.
Feel free to ask me whatever details you want, but need a urgent solution for this.
Regards,
PriyamIf you are using OCI driver, you may check whether using thin driver would avoid ClassCastException.
-
Java.lang.AbstractMethodError: oracle.sql.BLOB.setBytes
Hi ,
When I deployed an application ( In Oracle 10g )that uses oracleresultset i am getting an error as follows java.lang.AbstractMethodError: oracle.sql.BLOB.setBytes
anybody has a clue ?
VishnuHi Vishnu,
I got the same error, and also when trying blob.setBinaryStream(1L);
By me the DB is an 8.1.6 and the JDBC Driver I tried are both the new 10.1 and older ones.
Did you solve your problem ? In which case I would be interested in a solution. A work around seems to be the blob.getBinaryOutputStream() method, but this is a problem for me since it is not portable.
Regards
Michele -
Oracle.sql.BLOB and oracle.sql.STRUCT
I'm development a application in Java with oracle, to manage media files. When I try to insert into oracle , I have this problem "oracle.sql.BLOB cannot be cast to oracle.sql.STRUCT" , and I don't know what that can be ..
This is my code , please help with that.. If you have a smaple code of java and oracle to insert media , that will be a great help ..
public void loadDataFromStream(OracleConnection con)
try {
Statement s = con.createStatement();
OracleResultSet rs = (OracleResultSet)
s.executeQuery("select * from blobs where id='video2.avi' for update ");
String index = "";
while(rs.next())
index = rs.getString(1);
index+="1";
System.out.println("llego hasta aki");
// el error esta en esta linea de abajo ...
OrdVideo vidObj = (OrdVideo) rs.getCustomDatum(2, OrdVideo.getFactory());
//rs.getBfile(3);///
FileInputStream fStream = new FileInputStream("/home/jova/movie.avi");
vidObj.loadDataFromInputStream(fStream);
vidObj.getDataInFile("/home/jova/movie.avi");
fStream.close();
System.out.println(" getContentLength output : " +
vidObj.getContentLength());
OraclePreparedStatement stmt1 =
(OraclePreparedStatement) con.prepareCall("update blob_col set image = ? where id = " + index);
stmt1.setCustomDatum(1,vidObj);
stmt1.execute();
stmt1.close() ;
index+="1";
System.out.println("OK");
catch(Exception e) {
System.out.println("exception raised " + e);
System.out.println("load data from stream unsuccessful");
}I'm development a application in Java with oracle, to manage media files. When I try to insert into oracle , I have this problem "oracle.sql.BLOB cannot be cast to oracle.sql.STRUCT" , and I don't know what that can be ..
This is my code , please help with that.. If you have a smaple code of java and oracle to insert media , that will be a great help ..
public void loadDataFromStream(OracleConnection con)
try {
Statement s = con.createStatement();
OracleResultSet rs = (OracleResultSet)
s.executeQuery("select * from blobs where id='video2.avi' for update ");
String index = "";
while(rs.next())
index = rs.getString(1);
index+="1";
System.out.println("llego hasta aki");
// el error esta en esta linea de abajo ...
OrdVideo vidObj = (OrdVideo) rs.getCustomDatum(2, OrdVideo.getFactory());
//rs.getBfile(3);///
FileInputStream fStream = new FileInputStream("/home/jova/movie.avi");
vidObj.loadDataFromInputStream(fStream);
vidObj.getDataInFile("/home/jova/movie.avi");
fStream.close();
System.out.println(" getContentLength output : " +
vidObj.getContentLength());
OraclePreparedStatement stmt1 =
(OraclePreparedStatement) con.prepareCall("update blob_col set image = ? where id = " + index);
stmt1.setCustomDatum(1,vidObj);
stmt1.execute();
stmt1.close() ;
index+="1";
System.out.println("OK");
catch(Exception e) {
System.out.println("exception raised " + e);
System.out.println("load data from stream unsuccessful");
} -
ClassCastException while inserting in oracle.sql.BLOB
Hi,
I have to insert a blob data in to database . I wrote the code . I'm having a ClassCastException problem in the line oracle.sql.BLOB blob = oracle.sql.BLOB.createTemporary(st.getConnection(), false,
oracle.sql.BLOB.DURATION_CALL); while trying to store a BLOB value I'm using Oracle 9i. (JDBC classes12.jar).
if I use the method with a dedicated database connection that specifies the driver as oracle.jdbc.driver.OracleDriver there is no problem .
But when I use JBoss to run , I will get ClassCastException
I imagine that somewhere in the code of this method there is a cast of the underlying connection leading to the ClassCastException when used in conjunction with the jboss datasource. The code to save the BLOB is as follows:
String sql = " update test set code = ? where id = ? ";
BLOB newBlob = BLOB.createTemporary(dbcon, false, BLOB.DURATION_CALL);
newBlob.putBytes(1,data.getBytes());
stmt = dbcon.prepareStatement(newsql);
stmt.setBlob(1, newBlob);
stmt.setInt(2, Studid );
stmt.executeUpdate();
stmt.close();Can any one tell me how can I get this code to work with the datasource implementation.
ThanksI think this could be a problem with the class loader . Take a look at this thread It should solve your problem.
http://forum.java.sun.com/thread.jspa?forumID=48&threadID=788715 -
Insert Blob column in the client errors ClassCastException: oracle.sql.BLOB
Hi,
When I try to insert and commit a Blob column(picture) I am getting the following exception.
Is there any jar I need to add or any other setup I need to do to accept the BLOB column in the olite client database.
500 Internal Server Error
javax.faces.FacesException: #{backing_XXPBWorkOrderResultsCreatePGBean.saveButton_action}: javax.faces.el.EvaluationException: java.lang.ClassCastException: oracle.sql.BLOB
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:78)
at oracle.adf.view.faces.component.UIXCommand.broadcast(UIXCommand.java:211)
Caused by: java.lang.ClassCastException: oracle.sql.BLOB
at oracle.lite.poljdbc.LiteEmbPreparedStmt.setVal(Unknown Source)
at oracle.lite.poljdbc.POLJDBCPreparedStatement.setObject(Unknown Source)
at oracle.lite.poljdbc.POLJDBCPreparedStatement.setObject(Unknown Source)
at oracle.lite.poljdbc.POLJDBCPreparedStatement.setObject(Unknown Source)
at oracle.lite.web.JupPreparedStatement.setObject(Unknown Source)
at oracle.jbo.server.BaseSQLBuilderImpl.bindUpdateStatement(BaseSQLBuilderImpl.java:1765)
at oracle.jbo.server.EntityImpl.bindDMLStatement(EntityImpl.java:7345)
With regareds,
Kali.
OSSI.Here are examples if inserting into a Blob from text, file, and retrieving a blob.
Insert into a Blob (Text)
import java.io.FileNotFoundException;
import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class InsertBlob {
public static void main(String[] args) throws FileNotFoundException {
Connection con = null;
PreparedStatement stmt = null;
ResultSet rs = null;
String letterText = "some letter text";
long id = 100;
try {
DriverManager.registerDriver((Driver)(Class.forName("oracle.lite.poljdbc.POLJDBCDriver").newInstance()));
try {
con = DriverManager.getConnection("jdbc:polite:polite", "system", "manager");
} catch (SQLException sqle) {
sqle.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
try {
stmt = con.prepareStatement("INSERT INTO BLOB_TABLE (BLOB_ID, BLOB_DATA) VALUES (?, EMPTY_BLOB())");
stmt.setLong(1, id);
stmt.executeUpdate();
stmt = con.prepareStatement("SELECT BLOB_DATA FROM BLOB_TABLE WHERE BLOB_ID = ? FOR UPDATE");
stmt.setLong(1, id);
rs = stmt.executeQuery();
if (rs.next()) {
try {
oracle.lite.poljdbc.BLOB oliteBlob = null;
oliteBlob = ((oracle.lite.poljdbc.OracleResultSet) rs).getBLOB(1);
byte[] byteLetterText = letterText.getBytes();
oliteBlob.putBytes(1, byteLetterText);
con.commit();
} catch (ClassCastException e) {
e.printStackTrace();
} finally {
rs = null;
stmt = null;
con.rollback();
con = null;
} catch (SQLException e) {
e.printStackTrace();
}Insert Into a Blob (File)
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
public class InsertBlobFile {
public static void main(String[] args) throws FileNotFoundException {
Connection con = null;
PreparedStatement stmt = null;
long id = 200;
try {
DriverManager.registerDriver((Driver)(Class.forName("oracle.lite.poljdbc.POLJDBCDriver").newInstance()));
try {
con = DriverManager.getConnection("jdbc:polite:polite", "system", "manager");
} catch (SQLException sqle) {
sqle.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
try {
stmt = con.prepareStatement("INSERT INTO BLOB_TABLE (BLOB_ID, BLOB_DATA) VALUES (?, ?)");
stmt.setLong(1, id);
File fBlob = new File ( "C:\\BLOB_TEST_FILE.TXT" );
FileInputStream is = new FileInputStream ( fBlob );
stmt.setBinaryStream (2, is, (int) fBlob.length() );
stmt.executeUpdate();
con.commit();
} catch (SQLException e) {
e.printStackTrace();
}Retrieve from Blob (Write to file)
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.Blob;
import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class RetrieveBlob {
final static int bBufLen = 32 * 1024;
final static String outFile = "C:\\BLOB_OUTPUT_FILE.TXT";
public static void main(String[] args) throws IOException {
Connection con = null;
PreparedStatement stmt = null;
ResultSet rs = null;
try {
DriverManager.registerDriver((Driver)(Class.forName("oracle.lite.poljdbc.POLJDBCDriver").newInstance()));
try {
con = DriverManager.getConnection("jdbc:polite:polite", "system", "manager");
} catch (SQLException sqle) {
sqle.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
try {
stmt = con.prepareStatement("SELECT * FROM BLOB_TABLE");
rs = stmt.executeQuery();
while(rs.next()) {
int id = rs.getInt(1);
Blob value = rs.getBlob(2);
System.out.println(id + " | " + value);
writeBlobToFile(value);
} catch (SQLException e) {
e.printStackTrace();
public static long readFromBlob(Blob blob, OutputStream out)
throws SQLException, IOException {
InputStream in = blob.getBinaryStream();
int length = -1;
long read = 0;
byte[] buf = new byte[bBufLen];
while ((length = in.read(buf)) > 0) {
out.write(buf, 0, length);
read += length;
in.close();
return read;
public static long writeBlobToFile(Blob blob)
throws IOException, SQLException {
long wrote = 0;
OutputStream fwriter = new FileOutputStream(outFile);
wrote = readFromBlob(blob, fwriter);
fwriter.close();
return wrote;
}
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