[Webinar] Streamline your web hosting managementRegister Today

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 968
  • Last Modified:

Insert a clob data into database.

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
Farzad Akbarnejad
Asked:
Farzad Akbarnejad
2 Solutions
 
objectsCommented:
0
 
redpipeCommented:
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
 
Farzad AkbarnejadDeveloperAuthor Commented:
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

[Webinar] Kill tickets & tabs using PowerShell

Are you tired of cycling through the same browser tabs everyday to close the same repetitive tickets? In this webinar JumpCloud will show how you can leverage RESTful APIs to build your own PowerShell modules to kill tickets & tabs using the PowerShell command Invoke-RestMethod.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now