Solved

How to insert values for BLOB, CLOB ..etc?

Posted on 2011-03-24
7
902 Views
Last Modified: 2012-05-11
How to insert/update values for BLOB, CLOB ..etc
also need to know the usage for blob/clob,
need more examples for this.
How to check characters inside blob?
0
Comment
Question by:sakthikumar
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
  • 2
7 Comments
 
LVL 77

Expert Comment

by:slightwv (䄆 Netminder)
ID: 35206098
Insert them from what tool/language/???

You will need to convert the BLOB back into a clob to check for strings/characters.
0
 

Expert Comment

by:BSSForests
ID: 35208135
The following code is how I update a file into a Oracle Blob using Java:
As for insert a new blob, you need insert a new record, blob field with value "empty_blob()", then update this blob field using code below.


import oracle.sql.BLOB;


            //
            // update the contents of the file into the blob.
            //
            // Note: We must use ORACLE specific classes to do this for now (not
            // supported by JDBC).
            // Select the blob for update (locking it).
            //
            File file = new File(tmpPdf);
            if (file != null && file.exists() && file.canRead()) { // Select the blob for update (locking it).
                        String query = "select blob_field from table_name where id = 3" + " for update";
                  //System.out.println("query = " + query);
                  Connection conn =
                        ((JDBCDataObjectManager) objectMgr).getConnection();
                  //Get data connection using your way.

                  Statement stmt = conn.createStatement();
                  FileInputStream fis = new FileInputStream(file);
                  InputStream in = new BufferedInputStream(fis);
                  OutputStream out = null;
                  try {
                        ResultSet result = stmt.executeQuery(query);
                        if (result.next()) { //
                              // Use ORACLE specific classes to get the blob output stream.
                              //
                              oracle.sql.BLOB blob = (oracle.sql.BLOB) result.getBlob(1);
                              out =
                                    new BufferedOutputStream(blob.getBinaryOutputStream());
                              byte[] buf = new byte[blob.getBufferSize()];
                              int len;
                              while ((len = in.read(buf)) != -1) {
                                    out.write(buf, 0, len);
                              }
                              out.flush();
                        }
                  } finally {
                        in.close();
                        if (out != null) {
                              out.close();
                        }
                        stmt.close();
                  }
            
                  file.delete();
            }
0
 

Expert Comment

by:BSSForests
ID: 35208148
Replace the query with your own,

 String query = "select blob_field from table_name where id = 3"
0
Salesforce Made Easy to Use

On-screen guidance at the moment of need enables you & your employees to focus on the core, you can now boost your adoption rates swiftly and simply with one easy tool.

 

Author Comment

by:sakthikumar
ID: 35348117
Inserting from oracle plsql?
0
 

Author Comment

by:sakthikumar
ID: 35348132
normally we have a table in oracle, which has a clob column, when we are inserting the data by
writing a procedure, how do we insert a value for a clob column.
0
 
LVL 77

Accepted Solution

by:
slightwv (䄆 Netminder) earned 500 total points
ID: 35348141
You originally asked several questions in the original post.  Then the followup post didn't add much information.

Inserting LOBS from pl/sql is easy.  The online docs have many examples.

If the LOB is on the database server it's a simple dbms_lob.loadClobfrom file or dbms_lob.loadBlobfromfile

If the LOB is coming from some app and passed to a stored procedure as input, still easy.  Just declare the input parameter as a clob or blob.

For searching a blob, need $ore about the requirements.  You might be able to index them with Oracle Text and search for 'strings'. But I need to know the complete requirements.
0
 
LVL 77

Expert Comment

by:slightwv (䄆 Netminder)
ID: 35348152
I was typing when you posted the second post:  Clob or blob? Two different requirements.

Inserting to a clob is simple:

Insert into clob_column values('hello');
 
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Truncate is a DDL Command where as Delete is a DML Command. Both will delete data from table, but what is the difference between these below statements truncate table <table_name> ?? delete from <table_name> ?? The first command cannot be …
From implementing a password expiration date, to datatype conversions and file export options, these are some useful settings I've found in Jasper Server.
This video shows information on the Oracle Data Dictionary, starting with the Oracle documentation, explaining the different types of Data Dictionary views available by group and permissions as well as giving examples on how to retrieve data from th…
This video shows how to recover a database from a user managed backup

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question