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Thread: Inserting Large XML file into Oracle Database through java

  1. #1
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    Default Inserting Large XML file into Oracle Database through java

    Hello All,

    I am trying to insert a large xml file into oracle database through java , i am getting the following error ,please help me to resolve d issue,itz very urgent.

    ORA-30676: socket read or write failed
    ORA-06512: at "SYS.XMLTYPE", line 5


    Following is my code

    import oracle.sql.CLOB;
    import java.sql.Connection;
    import java.sql.SQLException;
    import java.io.Writer;

    import javax.xml.parsers.DocumentBuilderFactory;
    import javax.xml.parsers.DocumentBuilder;
    import org.w3c.dom.Document;
    import java.sql.SQLException;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.FileReader;
    import java.sql.*;
    import oracle.jdbc.OraclePreparedStatement;
    import oracle.sql.CLOB;
    import oracle.xdb.XMLType;
    public class InsertXml {
    // private static Connection conn=null;
    public static String getXMLString(java.sql.Connection conn, Document doc)throws SQLException

    {

    //String query="<?xml version=\"1.0\"?><customer><name>Joe Smith</name><Job>SoftWare</Job><title>Mathematician</title></customer>";
    String SQLTEXT = "";
    XMLType xml = null;
    xml = XMLType.createXML(conn,doc);
    //System.out.println("xml oject "+xml.toString());

    try {
    //xml = XMLType.createXML(conn,new FileInputStream("C://har1.xml"));
    xml = XMLType.createXML(conn,doc);
    // return xml.getStringVal().trim().replace("null", "").replace("\000", " ").replace("\0x0", " ").replace("\r\n", " ").replace("\n", " ");

    } catch (Exception e) {
    e.printStackTrace();
    }
    return xml.getStringVal();
    //return xml.getStringVal().trim().replace("null", "").replace("\000", " ").replace("\0x0", " ").replace("\r\n", " ").replace("\n", " ");

    }

    private static void insertXML(String xmlData, Connection conn) {
    CLOB clob = null;
    String query;
    //XMLType xml = null;
    //xml = XMLType.createXML(conn,doc);
    // Initialize statement Object
    OraclePreparedStatement pstmt = null;
    try{
    //query="insert into xml_tab(id) values(?)";
    //

    query = "INSERT INTO xml_tab(xmldata) values(xmltype.createxml(?))";

    // Get the statement Object
    pstmt = (OraclePreparedStatement)conn.prepareStatement(que ry);
    // xmlData is the string that contains the XML Data.
    // Get the CLOB object.
    clob = getCLOB(xmlData, conn);
    System.out.println("clob is "+clob);
    // Bind this CLOB with the prepared Statement
    //pstmt.setInt(1,2);
    // pstmt.setString(2,"test.xml");
    pstmt.setObject(1,clob);
    // pstmt.setObject(1, clob);
    // Execute the Prepared Statement
    if (pstmt.executeUpdate()==1) {
    System.out.println ("Successfully inserted a Purchase Order");
    }
    } catch(SQLException sqlexp){
    sqlexp.printStackTrace();
    } catch(Exception exp){
    exp.printStackTrace();
    }
    }

    private static CLOB getCLOB(String xmlData, Connection conn) throws SQLException{
    CLOB tempClob = null;
    try{
    // If the temporary CLOB has not yet been created, create one
    tempClob = CLOB.createTemporary(conn, true, CLOB.DURATION_SESSION);

    // Open the temporary CLOB in readwrite mode, to enable writing
    tempClob.open(CLOB.MODE_READWRITE);
    // Get the output stream to write
    Writer tempClobWriter = tempClob.getCharacterOutputStream();
    // Write the data into the temporary CLOB
    tempClobWriter.write(xmlData);

    // Flush and close the stream
    tempClobWriter.flush();
    tempClobWriter.close();

    // Close the temporary CLOB
    tempClob.close();
    } catch(SQLException sqlexp){
    tempClob.freeTemporary();
    sqlexp.printStackTrace();
    } catch(Exception exp){
    tempClob.freeTemporary();
    exp.printStackTrace();
    }
    return tempClob;
    }

    public static void main(String arg[]) {

    try {
    Connection conn=null;
    conn=DBConnection.getConnection();

    File fXmlFile = new File("C:/har1.xml");
    //String filetxt=fXmlFile.toString();
    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    Document doc = dBuilder.parse(fXmlFile);
    // doc.getDocumentElement().normalize();
    String strxml=getXMLString(conn,doc);
    insertXML(strxml,conn);

    //doInsert(conn, doc);

    } catch (Exception e) {
    e.printStackTrace();
    }
    }




    }


  2. #2
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    Default Re: Inserting Large XML file into Oracle Database through java

    I'm no expert at databases, let alone oracle, but I think this statement is incorrect:
    query = "INSERT INTO xml_tab(xmldata) values(xmltype.createxml(?))";
    xmldata is one of your variables, but you are using it as the literal string "xmldata". Same kind of issue for the xmltype.createxml part. I believe this is causing a problem, but I'm not positive.

  3. #3
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    Default Re: Inserting Large XML file into Oracle Database through java

    Hi KucerakJM,
    Thnx for ur reply ,but my column name is xmldata ,it is not the string literal in the above insert query.

  4. #4
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    Default Re: Inserting Large XML file into Oracle Database through java

    I see, well I don't think I will be much help here but I do see one thing that you may want to change. In the main method xml = XMLType.createXML(conn,doc); is called before the try/catch statement and then once more inside of it, just something a bit redundant. Wish I could be of more help.

  5. #5
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    Default Re: Inserting Large XML file into Oracle Database through java

    i changed it to call once ,but still the same issue

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