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h3. Creating an Extractor for downloading MaxDB Table Data to XML Most of the database query tools allow the user to export the data to local files. This is a very important feature that every one expects. But the main thing that is to be noticed is the format in which it is getting downloaded. Here we have a main question to answer. Is it possible to make other systems understand the contents of the file with minimum manipulation? I hope most of the cases this does not hold well. This obstacle has been overcome using the XML format which can be understood by any system. I found a tool named SQLYog ( which had an option to download table data to XML format. image I thought of trying to download the MaxDB Table data to XML format. The Excel and an ordinary file format were the two possibilities I had with SQL Studio. image Then I developed a simple java application to download the MaxDB data to XML format. This weblog discusses the same considering a simple table with a few records for test purpose. Table Definition I took a simple table with 3 fields for the discussed case. image Table Contents The test table contained three records that are to be downloaded to XML. image The Java Extractor Program In this program the ResultSetMetaData plays a key role while building the XML tags for the data that was downloaded. /** * Project :DataDownloadAsXML * Date :Jul 26, 2005 * Programmed By: Kathirvel Balakrishnan * Company : Wipro Technologies * Designation : Project Engineer */ package com.xmldata; import*; import java.sql.*; public class ExtractMaxDBDataToXML { String serverName = null; String dataBase = null; String tableName = null; String userName = null; String password = null; String fileName = null; Connection myConnection; Statement myStatement; ResultSet myRs = null; ResultSetMetaData myRsM = null; /** * The constructors are created for the program. */ public ExtractMaxDBDataToXML(String serverName, String dataBase, String tableName, String userName, String password, String fileName){ this.serverName = serverName; this.dataBase = dataBase; this.tableName = tableName; this.userName = userName; this.password = password; this.fileName = fileName; } public void loadDriver(){ try{ Class.forName(“”); System.out.println(“The Driver has been loaded successfully!”); }catch(Exception E1){ System.out.println(“Unable to load the error!”); System.out.println(“Exceptions:”+E1.toString()); System.exit(1); } } public void createXML() throws IOException { System.out.println(“Establishing connection to Server”); try{ FileWriter xmlWriter = new FileWriter(fileName); //Establishing the connection with the database myConnection = DriverManager.getConnection(“jdbc:sapdb://” + serverName + “/” + dataBase, userName, password); myStatement = myConnection.createStatement(); System.out.println(“Connection to Server was Established”); // Executing the SQL Query myRs = myStatement.executeQuery(“select * from “+tableName); myRsM = myRs.getMetaData(); // Processing the resultset and downloading data to XML System.out.println(“Data download to XML started\n”); xmlWriter.write(“”); for(int i=1; i<=myRsM.getColumnCount();i++){ System.out.print(myRs.getString(i)+”\t”); xmlWriter.write(“<“+myRsM.getColumnName(i)+”>”+myRs.getString(i)+”</”+myRsM.getColumnName(i)+”>”); } System.out.println(“\n”); xmlWriter.write(“”); } xmlWriter.write(“”); System.out.println(“Data successfully downloaded to XML”); // Closing the connection parameters xmlWriter.close(); myRs.close(); myStatement.close(); myConnection.close(); }catch(IOException E){ System.out.println(“File Handling Errors :”+E.toString()); }catch(Exception E2) { // Prints if any exception is raised System.out.println(” Exceptions : “+E2.toString()); } } public static void main(String[] args) throws IOException { ExtractMaxDBDataToXML myXML = new ExtractMaxDBDataToXML(“localhost”,”TEST”,”ACCESSCARD”,”DBADMIN”,”maxdb”,”d:/MaxDB.xml”); myXML.loadDriver(); myXML.createXML(); } } The Result of the Program The data was successfully extracted to XML format and the results were displayed in the console. image The extracted XML file The XML file created had all the details and is given below. image
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  1. Prakash Singh
    Hi Kathirvel,
        Shouldn’t you look at the traffic for all your MAXDB weblogs(number of visits)?I would recommend a change in direction/content for your weblog, if it doesn’t genereate interest from people. Maybe there aren’t too many people using MAXDB. Just a suggestion.

    Prakash Singh

    1. Anonymous
      Hi Kathir,

      I think you should also spend some time in the Forum we have for MaxDB – SAP MaxDB You may be able to help out the other folks who have a trouble with some aspect of it and then if you find many guys asking similar doubts you could then write up a weblog on that and give a link in the forum.

      I think it’s always a good idea to be active in the forums. You will get to know the “pulse” of the community and the problems they face in everyday work. The readership for your weblogs might then even increase.

      Anand Mandalika.

      P.S. Is there any specific reason why do not participate in the MAxDB Forum at all?

  2. Kathirvel Balakrishnan Post author
    Hi Prakash,

    Thanks for your suggestions. I accept that MaxDB is not as popular as EP, XI etc are. But you know MaxDB is a part of the NetWeaver Product and people have started using it. I think it will be helpful for them.


  3. Kathirvel Balakrishnan Post author
    Hi Anand,

    I do spend some time at MaxDB forum, but most queries are regarding installation and uninstallation. Any how what you said was very valid and from my part there is no such real reason for taking part i do go through ABAP, Java, MaxDB forum.



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