Solved

Insert a clob data into database.

Posted on 2006-10-30
4
896 Views
Last Modified: 2008-02-01
Hello,
I have a <b>empty</b> table with some fields that one of them has Clob type in Oracle.
How can I insert a new row in it and fill its clob type field with a given string?
I must prepare a clob object and fill my given string to it. But I couldn't create clob object.

Thanks
-FA
0
Comment
Question by:Farzad Akbarnejad
4 Comments
 
LVL 92

Assisted Solution

by:objects
objects earned 100 total points
ID: 17832316
0
 
LVL 5

Accepted Solution

by:
kannan_ekanath earned 400 total points
ID: 17832357
0
 
LVL 8

Expert Comment

by:redpipe
ID: 17832484
Can be done in many ways. The code beneath shows how I do it. Mind you that I have not included initialization of the java.sql.Connection object...
public void SetClob(String msg) throws Exception {
  Connection                            conn                  = null;
  String                                sqlTekst              = null;
  Statement                             stmt1                 = null;
  Statement                             stmt2                 = null;
  ResultSet                             rs                    = null;
  Clob                                  msgClob               = null;

  try{
    sqlTekst = "INSERT INTO myTable (col_id, myClobColumn) VALUES (1, EMPTY_CLOB())";
    stmt1 = conn.createStatement(sqlTekst);
    numRows = stmt1.executeUpdate(sqlTekst);

    sqlTekst = "SELECT myClobColumn FROM myTable WHERE col_id = 1 FOR UPDATE";
    stmt2 = conn.createStatement();
    rs = stmt2.executeQuery(sqlTekst);
    while (rs.next()) {  
      msgClob = rs.getClob("myClobColumn");
    }

    java.io.Writer wrXml = ((weblogic.jdbc.common.OracleClob) msgClob).getCharacterOutputStream();
    char[] xmlChars = msg.toCharArray();
    wrXml.write(xmlChars);
    wrXml.flush();
    wrXml.close();


private String GetClob(){
  Connection                            conn                  = null;
  String                                sqlTekst              = null;
  Statement                             stmt                  = null;
  ResultSet                             rs                    = null;
 
  stmt = conn.createStatement();
  rs = stmt.executeQuery("SELECT myClobColumn FROM myTable");

  if(rs.next()){
    // Retrieve the value of the designated column as a Clob object
    java.sql.Clob msgClob = rs.getClob("myClobColumn");  
    // Holds the Clob data when the Clob stream is being read
    StringBuffer sb = new StringBuffer();
    // Open a stream to read Clob data
    java.io.Reader clobStream = msgClob.getCharacterStream();
    // Read from the Clob stream and write to the stringbuffer
    int numChars = 0;
    // Buffer holding characters being transferred
    char[] buffer = new char[10];
    while((numChars = clobStream.read(buffer)) != -1){  // Read from Clob
      sb.append(buffer, 0, numChars);                   // Write to StringBuffer
    }
    clobStream.close();                                 // Close the Clob input stream
    return sb.toString();
  } else {
    return null;
  }
}
0
 
LVL 14

Author Comment

by:Farzad Akbarnejad
ID: 17834206
redpip,
Using your code for me reason is hard because I want to fill data of some oracle tables from SQL Server tables with same name and data types. I want to fill club fields with text type in sql server.

I used kannan_ekanath  solution but the object's link is great so I split points between you.

-FA

0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
windows explorer path to command prompt 5 54
Unhandled exception type Exception 18 42
jmss example java 2 23
Is there a simpler dropbox system? 10 34
For customizing the look of your lightweight component and making it look opaque like it was made of plastic.  This tip assumes your component to be of rectangular shape and completely opaque.   (CODE)
Java functions are among the best things for programmers to work with as Java sites can be very easy to read and prepare. Java especially simplifies many processes in the coding industry as it helps integrate many forms of technology and different d…
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…

860 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