ARRAY using in PreparedStatement in various servers

Hello, all! I have a question.
I want to use array in my sql query and write next:
PreparedStatement ps = con.prepareStatement(MY_QUERY);
ArrayDescriptor arrayDescriptor = ArrayDescriptor.createDescriptor("CHAR_ARRAY", wrappedConection);
ARRAY myArray = new ARRAY(arrayDescriptor, con, javaArray);
ps.setArray(1, myArray);
ResultSet result = ps.executeQuery();
The problem lay in the arrayDescriptor need for OracleConnection, but I have wrapped connection from various servers. Any suggestions?

If you need a database-specific class that's outside the java.sql interface set, I'd say you're doing it wrong.
How is saving an array relational? Why wouldn't it be n records instead of 1?
%

Similar Messages

  • How to re-use a PreparedStatement from poolled connections?

    Consider poolled connections....
    one advantage of poolled connections are resource sharing...preventing the system from creating lots of connections or from creating and destroying similar connections.
    Connection and thread pools are specially usefull on multi-threaded servers.
    Consider now an application that has a service that logs the number of times a user has connected.
    This service is thread-safe, it is synchronized (bad) or it doesn�t have state (good).
    Every time a thead is started in this service a connection is requested from the pool que the service finish logging it needs to release the connection back to the pool.
    This is done automatically by the Connection wrapper. When we do conn.close(); actually the wrapper is releasing the connection so that other threads and services can use it.
    Suppose the log service uses this PreparedStatement: "Update users set accessCount=accessCount+1 where userId=?"
    Because we are using connection pooling, every time the service is requested we possibly get a different connection object. Then, we can�t store a PreparedStatement object locally.
    If we use a conn.prepareStatement, then we are creating a new PreparedStatement on every request. Isn�t it? Then, we are not able to re-use PreparedStatements.
    Does anyone know a pratical way to re-use PreparedStatements in a multi-threaded server? In my case, this is a servlet.
    Thanks

    I can only speak about DB2 on the ISeries (AS/400) but to get the benifits of prepared statments it is not required to leave the preperedstatment object open. The first time a prepared statment is prepared against a connection: it takes a significant amount of time, subsiquent prepares for exactly the same SQL take practically no time.
    It may be different on with your database and driver but you should have a test!
    So if this is the case it is not a problem to create and close a prepared statment with every request, you will get the preformance increase after the 1st time the statment is prepared against the connection in question.
    Hope this helps!

  • Using batched PreparedStatements - found bug

    i am using batched PreparedStatements.
    Everything is forking fine - but - when i suppose to get integer of ints (which means number of rows affected by query) - i got a array of constants (-2).
    Here is pease of code and results.
    It seems to be a bug of Oracle JDBC driver.
    Anybody know about that ? any workaround ?
    i have tried last version of production JDBC driver - no success .....
    public static void executeBatch (PreparedStatement stmt)
    throws Exception
    int[] counts = stmt.executeBatch();
    System.out.println("XXX counts num="+counts.length);
    for (int i = 0; i < counts.length; i++)
    System.out.println(" XXX count="+counts);
    if (counts [i] == 0)
    // throw new RuntimeException(
    throw new Exception(
    "Wrong return count in batched statement");
    XXX counts num=1
    XXX count=-2
    XXX counts num=3
    XXX count=-2
    XXX count=-2
    XXX count=-2
    XXX counts num=4
    XXX count=-2
    XXX count=-2
    XXX count=-2
    XXX count=-2
    null

    I am trying to reproduce this but as of now, mine is working properly.
    Can you copy and paste your system information in this thread for me to take a look at? (Photoshop  Help>system info)
    Pattie

  • How to get the values of an Array using JSP Tags

    Hey guys,
    I need some help. I've splited a String using
    fn:split(String, delim) where String = "1,2,3,4" and delim is ,
    This method returns an Array of splited Strings. how do i get the values from this array using jsp tags. I don't wanna put java code to achive that.
    Any help would be highly appreciated
    Thanks

    The JSTL forEach tag.
    In fact if all you want to do is iterate over the comma separated list, the forEach tag supports that without having to use the split function.
    <c:set var="list" value="1,2,3,4"/>
    <c:forEach var="num" items="${list}">
      <c:out value="${num}"/>
    </c:forEach>The c:forTokens method will let you do this with delimiters other than a comma, but the forEach tag works well just with the comma-delimited string.

  • How to populate multi-cluster arrays using matlab code?

    Hi,
    I have an array of clusters containing two 'Double' elements in each cluster. I am looking for a method to populate this array using MATLAB code. I need around 1000 clusters in the array, so populating it using the front panel is not practical. There is also some calculation involved in deciding the value in each element. If there is an example or a method to do this, please point me in the right direction.
    Thanks

    altenbach wrote:
    Can you attach a typical file so we know that the structure is? It is easy to convert from any data structure to any other data structure. You could even read it as a 1D string array and parse each line into a cluster, for example. It all depends on how the fil is arranged. You could also read the file as a flat string and chop it up into the desired structure later.
    I have attached the .vi file. I need to convert the spreadsheet to an array of clusters, thats where I'm getting stuck. (The vi is an example from help libraries)
    That is the part where I need to change so that I can use a spreadsheet.
    Attachments:
    Buffered counter.vi ‏52 KB

  • Playing a wav file (byte array) using JMF

    Hi,
    I want to play a wav file in form of a byte array using JMF. I have 2 classes, MyDataSource and MyPullBufferStream. MyDataSource class is inherited from PullStreamDataSource, and MyPullBufferStream is derived from PullBufferStream. When I run the following piece of code, I got an error saying "EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x7c9108b2, pid=3800, tid=1111". Any idea what might be the problem? Thanks.
    File file = new File(filename);
    byte[] data = FileUtils.readFileToByteArray(file);
    MyDataSource ds = new MyDataSource(data);
    ds.connect();
    try
        player = Manager.createPlayer(ds);
    catch (NoPlayerException e)
        e.printStackTrace();
    if (player != null)
         this.filename = filename;
         JMFrame jmframe = new JMFrame(player, filename);
        desktop.add(jmframe);
    import java.io.IOException;
    import javax.media.Time;
    import javax.media.protocol.PullBufferDataSource;
    import javax.media.protocol.PullBufferStream;
    public class MyDataSource extends PullBufferDataSource
        protected Object[] controls = new Object[0];
        protected boolean started = false;
        protected String contentType = "raw";
        protected boolean connected = false;
        protected Time duration = DURATION_UNKNOWN;
        protected PullBufferStream[] streams = null;
        protected PullBufferStream stream = null;
        protected final byte[] data;
        public MyDataSource(final byte[] data)
            this.data = data;
        public String getContentType()
            if (!connected)
                System.err.println("Error: DataSource not connected");
                return null;
            return contentType;
        public void connect() throws IOException
            if (connected)
                return;
            stream = new MyPullBufferStream(data);
            streams = new MyPullBufferStream[1];
            streams[0] = this.stream;
            connected = true;
        public void disconnect()
            try
                if (started)
                    stop();
            catch (IOException e)
            connected = false;
        public void start() throws IOException
            // we need to throw error if connect() has not been called
            if (!connected)
                throw new java.lang.Error(
                        "DataSource must be connected before it can be started");
            if (started)
                return;
            started = true;
        public void stop() throws IOException
            if (!connected || !started)
                return;
            started = false;
        public Object[] getControls()
            return controls;
        public Object getControl(String controlType)
            try
                Class cls = Class.forName(controlType);
                Object cs[] = getControls();
                for (int i = 0; i < cs.length; i++)
                    if (cls.isInstance(cs))
    return cs[i];
    return null;
    catch (Exception e)
    // no such controlType or such control
    return null;
    public Time getDuration()
    return duration;
    public PullBufferStream[] getStreams()
    if (streams == null)
    streams = new MyPullBufferStream[1];
    stream = streams[0] = new MyPullBufferStream(data);
    return streams;
    import java.io.ByteArrayInputStream;
    import java.io.IOException;
    import javax.media.Buffer;
    import javax.media.Control;
    import javax.media.Format;
    import javax.media.format.AudioFormat;
    import javax.media.protocol.ContentDescriptor;
    import javax.media.protocol.PullBufferStream;
    public class MyPullBufferStream implements PullBufferStream
    private static final int BLOCK_SIZE = 500;
    protected final ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW);
    protected AudioFormat audioFormat = new AudioFormat(AudioFormat.GSM_MS, 8000.0, 8, 1,
    Format.NOT_SPECIFIED, AudioFormat.SIGNED, 8, Format.NOT_SPECIFIED,
    Format.byteArray);
    private int seqNo = 0;
    private final byte[] data;
    private final ByteArrayInputStream bais;
    protected Control[] controls = new Control[0];
    public MyPullBufferStream(final byte[] data)
    this.data = data;
    bais = new ByteArrayInputStream(data);
    public Format getFormat()
    return audioFormat;
    public void read(Buffer buffer) throws IOException
    synchronized (this)
    Object outdata = buffer.getData();
    if (outdata == null || !(outdata.getClass() == Format.byteArray)
    || ((byte[]) outdata).length < BLOCK_SIZE)
    outdata = new byte[BLOCK_SIZE];
    buffer.setData(outdata);
    byte[] data = (byte[])buffer.getData();
    int bytes = bais.read(data);
    buffer.setData(data);
    buffer.setFormat(audioFormat);
    buffer.setTimeStamp(System.currentTimeMillis());
    buffer.setSequenceNumber(seqNo);
    buffer.setLength(BLOCK_SIZE);
    buffer.setFlags(0);
    buffer.setHeader(null);
    seqNo++;
    public boolean willReadBlock()
    return bais.available() > 0;
    public boolean endOfStream()
    return willReadBlock();
    public ContentDescriptor getContentDescriptor()
    return cd;
    public long getContentLength()
    return (long)data.length;
    public Object getControl(String controlType)
    try
    Class cls = Class.forName(controlType);
    Object cs[] = getControls();
    for (int i = 0; i < cs.length; i++)
    if (cls.isInstance(cs[i]))
    return cs[i];
    return null;
    catch (Exception e)
    // no such controlType or such control
    return null;
    public Object[] getControls()
    return controls;

    Here's some additional information. After making the following changes to MyPullBufferStream class, I can play a wav file with gsm-ms encoding with one issue: the wav file is played many times faster.
    protected AudioFormat audioFormat = new AudioFormat(AudioFormat.GSM, 8000.0, 8, 1,
                Format.NOT_SPECIFIED, AudioFormat.SIGNED, 8, Format.NOT_SPECIFIED,
                Format.byteArray);
    // put the entire byte array into the buffer in one shot instead of
    // giving a portion of it multiple times
    public void read(Buffer buffer) throws IOException
            synchronized (this)
                Object outdata = buffer.getData();
                if (outdata == null || !(outdata.getClass() == Format.byteArray)
                        || ((byte[]) outdata).length < BLOCK_SIZE)
                    outdata = new byte[BLOCK_SIZE];
                    buffer.setData(outdata);
                buffer.setLength(this.data.length);
                buffer.setOffset(0);
                buffer.setFormat(audioFormat);
                buffer.setData(this.data);
                seqNo++;
        }

  • Trying to compare string array using equals not working

    Hi,
    im prolly being really dumb here, but i am trying to compare 2 string arrays using the following code:
    if(array.equals(copymearray))
    System.out.println("they match");
    else
    {System.out.println("dont match");}
    the trouble is that even though they do match i keep getting dont match, can anyone tell me why?

    try
    if (Arrays.equals(array, copymearray))
    System.out.println("they match");
    else
    {System.out.println("dont match");}

  • Why can't I select or update the Record using the PreparedStatement?

    the DB is oracle9i,here is the test table
    test
    id number;
    name char(10);
    intro char(10);
    I have insert a record in the table.
    Now I will select or update the record by using the PreparedStatement here is my code:
    sqlStr = "update test set intro = ? where name =?";
    PreparedStatement stmt = conn.prepareStatement(sqlStr);
    stmt.setString(1,"my name is irixwang");
    stmt.setString(2,"irixwang");
    int is = stmt.executeUpdate();
    if (is >=1 )
    System.out.println("ok");
    It will not work ,but where I change the update condiction as followed:
    sqlStr = "update test set intro = ? where id =?";
    PreparedStatement stmt = conn.prepareStatement(sqlStr);
    stmt.setString(1,"my name is irixwang");
    stmt.setInt(2,100);
    int is = stmt.executeUpdate();
    It works well,why?
    please help me!thk!!!!

    I doubt it works "well" in either case since you are inserting a string that is longer than 10 characters into a field that only holds 10 characters. But to your question....
    A char data type holds a fixed number of characters - in your case 10.
    Because it holds 10 characters it will never hold 9, regardless of what you think is in the field it will always have 10 characters in it. The value you are using for query for name is 9 characters. Since 9 characters, regardless of content, will never be equal to 10 characters there is no way that it will update.
    So your choice is to either use a varchar, which holds a variable number of characters, or to always use 10 characters for your query (pad it with spaces.)

  • How to create an array using reflection.

    How to create an array using reflection.
    I want to achive something like this,Object o;
    o = (Object)(new TestClass[10]);but by use of reflection.
    To create a single object is simple:Object o;
    o = Class.forName("TestClass").newInstance();But how do I create an array of objects, when the class of objects is known only by name? (Can't use Object[] because even though an Object[] array can be filled with "TestClass" elements only, it Cannot be casted to a TestClass[] array)
    Anybody knows?":-)
    Ragnvald Barth
    Software enigneer

    Found it!
    the java.lang.reflect.Array class solves it!
    Yes !!!

  • Using a PreparedStatement accross transactions

    How can I use a PreparedStatement object across multiple transactions?
    Every transaction uses a dedicated jdbc connection, and all database interaction
    needs to use this connection object in order to participate in the transaction.
    So, if I do:
    PreparedStatement ps = conn.prepareStatement("...");
    the prepared statement object is tied to "conn". Can I use this prepared statement
    object in other transactions that are using other connections? There is no method
    to reset the connection object in PreparedStatement.
    Am I totally missing the point here?

    GB wrote:
    How can I use a PreparedStatement object across multiple transactions?
    Every transaction uses a dedicated jdbc connection, and all database interaction
    needs to use this connection object in order to participate in the transaction.
    So, if I do:
    PreparedStatement ps = conn.prepareStatement("...");
    the prepared statement object is tied to "conn". Can I use this prepared statement
    object in other transactions that are using other connections? There is no method
    to reset the connection object in PreparedStatement.
    Am I totally missing the point here?You're not missing the point, but you do not know the sleight-of-hand that
    weblogic can do for you, under the covers. How are you getting your connections?
    If they come from a weblogic transaction-aware DataSource or the jts driver, and the
    transaction is being managed by the weblogic transaction coordinator, we have you
    covered.
    You should create your PreparedStatements as you show, wherever you need them.
    You cannot pass a statement around, or retain it across transactions, but if you get
    your connection from our pool, the pool transparently caches prepared statements
    with the connection they came from, and when your code does a prepareStatement(),
    we transparently return a currently-unused cached statement for that SQL, if it exists.
    Joe

  • Need to sort an object array using an element in the object.

    hi all,
    i need to sort an object array using an element in the object.can someone throw some light on this.
    Edited by: rageeth on Jun 14, 2008 2:32 AM

    [http://java.sun.com/docs/books/tutorial/collections/interfaces/order.html]

  • Transposing data in an array using a For Loop

    I am trying to transpose some data in an array using a  for loop starting from the size of the array then decrement down to 0. Can someone please help if you have an example?
    Solved!
    Go to Solution.

    I feel as if reverse 1D array may help
    Edit: misunderstood what your second post meant.
    CLA, LabVIEW Versions 2010-2013

  • Problems creating a Java Array using JNI-HELP!

    Hi,
    I am trying to create a Java Array using JNI.I have posted the code below. The problem is that the oth element is added correctly to the Array but when the JVM gets to the next element...it goes for a toss. It is not able to create a new instance of the object in GetUGEntity() function...there seems to be some problem in creating a new instance of the object!
    Can somebody help me with this?
    jobject GetUGEntity(JNIEnv *env, UF_DISP_j3d_entity_t* entity_list)
         int numVerts=0, numStrips=0;
         jfieldID fid;
         jdoubleArray jTransform=NULL;
         jstring jstrName=NULL;
         jdoubleArray jNormals=NULL;
         //Init an Entity object
         cout<< "**Getting New Class Reference...";
         jclass jEntity = env->FindClass("Lcom/wipro/java3d/rmi/Entity;");
         cout << "**got Class reference..."<<endl;
         if (jEntity == NULL)
              return NULL;
         cout<<"Creating new object instance...";
         jmethodID mIDInit = env->GetMethodID(jEntity, "<init>", "()V");
         cout<<"Got java method id...";
         jobject javaObj = env->NewObject(jEntity, mIDInit);
         if (javaObj==NULL)
              return NULL;
         cout << "Created!" << endl;
         //Entity ID
         cout<< "**Setting eid...";
         fid=env->GetFieldID(jEntity,"eid","I");
         jint eid = (jint)(entity_list)->eid;
         env->SetIntField(javaObj, fid, eid);
         //env->DeleteLocalRef(eid);
         cout << "Done!" << endl;
         cout << "Done!" << endl;
         cout<< "**Returning jobject...";
         return javaObj;
    jobjectArray createJArray(JNIEnv* env, UF_DISP_j3d_entity_t** entity_list, int noOfEntities )
         UF_DISP_j3d_entity_t* tempVar=NULL;
         cout<<"*Creating Jobjectarray...";
         jobjectArray jEntityArray = (jobjectArray) env->NewObjectArray(noOfEntities,
              env->FindClass("Lcom/wipro/java3d/rmi/Entity;"),NULL);
         cout<<"Created!"<<endl;
         for(int i=0; i<noOfEntities;++i)
              tempVar = &(*entity_list);
              if (tempVar !=NULL)
                   cout<<"*Trying to get Entity...."<<endl;
                   jobject jEntity = GetUGEntity(env, tempVar);
                   if (jEntity!= NULL)
                        cout<<"Got Entity!" <<endl;
                        cout <<"*Setting Array Element....";
                        env->SetObjectArrayElement(jEntityArray, i, jEntity);
                        cout << "Done!" << endl;
                   else
                        printf("ERROR: Did not get Entity Reference");
              else
                   printf("ERROR: Got a NULL Reference!");
         return jEntityArray;

    Hi Deepak,
    Could you please let us know upto which line your code is going safe. Try printing the value in the structure before you send that to the method GetUGEntity().
    I am not too sure that would be a problem. But I have faced a problem like this, wherein I tried to access a structure for which I have not allocated memory and hence got exception because of that.
    Since your JNI code seems to be error free, I got doubt on your C part. Sorry.
    Dhamo.

  • Search given string array and replace with another string array using Regex

    Hi All,
    I want to search the given string array and replace with another string array using regex in java
    for example,
    String news = "If you wish to search for any of these characters, they must be preceded by the character to be interpreted"
    String fromValue[] = {"you", "search", "for", "any"}
    String toValue[] = {"me", "dont search", "never", "trip"}
    so the string "you" needs to be converted to "me" i.e you --> me. Similarly
    you --> me
    search --> don't search
    for --> never
    any --> trip
    I want a SINGLE Regular Expression with search and replaces and returns a SINGLE String after replacing all.
    I don't like to iterate one by one and applying regex for each from and to value. Instead i want to iterate the array and form a SINGLE Regulare expression and use to replace the contents of the Entire String.
    One Single regular expression which matches the pattern and solve the issue.
    the output should be as:
    If me wish to don't search never trip etc...,
    Please help me to resolve this.
    Thanks In Advance,
    Kathir

    As stated, no, it can't be done. But that doesn't mean you have to make a separate pass over the input for each word you want to replace. You can employ a regex that matches any word, then use the lower-level Matcher methods to replace the word or not depending on what was matched. Here's an example: import java.util.*;
    import java.util.regex.*;
    public class Test
      static final List<String> oldWords =
          Arrays.asList("you", "search", "for", "any");
      static final List<String> newWords =
          Arrays.asList("me", "dont search", "never", "trip");
      public static void main(String[] args) throws Exception
        String str = "If you wish to search for any of these characters, "
            + "they must be preceded by the character to be interpreted";
        System.out.println(doReplace(str));
      public static String doReplace(String str)
        Pattern p = Pattern.compile("\\b\\w+\\b");
        Matcher m = p.matcher(str);
        StringBuffer sb = new StringBuffer();
        while (m.find())
          int pos = oldWords.indexOf(m.group());
          if (pos > -1)
            m.appendReplacement(sb, "");
            sb.append(newWords.get(pos));
        m.appendTail(sb);
        return sb.toString();
    } This is just a demonstration of the technique; a real-world solution would require a more complicated regex, and I would probably use a Map instead of the two Lists (or arrays).

  • To make one larger array using other two arrays

    Hi,
    I have two one dimensional arrays, using these two arrays as index need to create another larger one dimensional array.
    like : if two one dimensional arrays namely X and Y, then X and Y should go as index for the final array.
    Please help.
    Thank you

    kathyayini wrote:
    I have two one dimensional arrays, using these two arrays as index need to create another larger one dimensional array.
    like : if two one dimensional arrays namely X and Y, then X and Y should go as index for the final array.
    Please help.I second jverd, but you might want to look at Arrays.copy() and System.arrayCopy().
    Winston

Maybe you are looking for

  • Error when printing

    Hi, When I try to print from Adobe Acrobat Pro on my Oki 5650 printer Adobe close down and I get this error message. Process:         AdobeAcrobat [144] Path:            /Applications/Adobe Acrobat X Pro/Adobe Acrobat Pro.app/Contents/MacOS/AdobeAcro

  • How to make bean create xml file...

    In my project I have a bean that is called from a jsp file... How does one make this bean write to an xml file? If anyone have a sample code I could watch, I would be very happy!! In advance thanx a lot!

  • TTS not working (in Babylon or Foxit reader read out loud or adobe reader read out loud)

    Hello Text to speech in applications(such as Babylon or Foxit reader read out loud or adobe reader read out loud) that use it does not work. Do not get any error, but when play would have no sound. I think this problem has caused the program system m

  • Java.lang.IncompatibleClassChangeError when deploying web service

    Hi there, I'm trying to deploy a jax-rpc web service and get a java.lang.IncompatibleClassChangeError error when I use org.apache.axis.client.AdminClient with the following deploy.wsdd file. The funny thing is the Web Service is deployed and listed i

  • Table - Storing data in a AbstractTableModel for a renderer

    I have a class which extends AbstractTableModel in which I am storing more than just the data which is displayed in each cell (i.e. metadata and other data which is specific to the cells are stored in private arrays). I also have a class which extend