public void displayPhoto() {
rs = null;
String displaySQL = "select * from images where USERNAME ='" + temp.getUsername() + "'";
try {
con = getDBConnection();
rs = st.executeQuery(displaySQL);
while (rs.next()) {
BufferedImage im = ImageIO.read(rs.getBinaryStream("IMAGES"));
displayPhoto.setIcon(new ImageIcon(im));
}
} catch (Exception e) {
e.printStackTrace();
}
}
I'm trying to display the image from database, the image stored as longblob. it says NULLPOINTERS, I dunno what's the problem
the table has 2 columns(USERNAME,IMAGES)
images = table name,
IMAGES = Column name,
displayPhoto = JLabel
can anyone help me?
thanks in advance<3
Here is the full error message
java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(ImageIcon.java:228)
at MyProfile.displayPhoto(MyProfile.java:395)
at MyProfile.<init>(MyProfile.java:195)
at Login.actionPerformed(Login.java:93)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:729)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:688)
at java.awt.EventQueue$3.run(EventQueue.java:686)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:702)
at java.awt.EventQueue$4.run(EventQueue.java:700)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:699)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
try {
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/login", "root", "obierofelix");
stmt = con.createStatement();
rs = stmt.executeQuery("select * from images");
rs.next();
BufferedImage im = ImageIO.read(rs.getBinaryStream("Image"));
BackGroundImage.setIcon(new ImageIcon(im));
} catch (Exception err) {
JOptionPane.showMessageDialog(this, err.getMessage());
}
Apply rs.next(); before the try and catch block to move the pointer to the first record in the database.
Related
This is my populate account method which takes the values from my database columns and stores them within an arraylist of objects of the account class that i made which has fields like username and password.
The second part of the code will show if you scroll down
private ArrayList<account> populateAccount() throws SQLException{
Connection c = DatabaseUtilityClass.createNewConnection();
ArrayList<account> list = new ArrayList();
try{
String q = "Select * from LOGIN";
Statement stmt = (Statement)c.createStatement();
try(ResultSet rs= stmt.executeQuery(q)){
while(rs.next()){
account a = new account();
a.setUsername(rs.getString("USERNAME"));
a.setPassword(rs.getString("PASSWORD"));
list.add(a);
}
}
}
catch(Exception e){
e.printStackTrace();
System.out.println("err");
}
c.close();
return list;
}
This is the second part of my code which should store the arraylist of objects filled with the database info and then take user text and use a for each loop to iterate through each object checking if the username and password values are the same as the one the user entered via a jTextfield and password field. The errors are on the bottom.
private void LoginActionPerformed(java.awt.event.ActionEvent evt) {
try {
accountCheck= populateAccount();
} catch (SQLException ex) {
Logger.getLogger(LoginPage.class.getName()).log(Level.SEVERE, null, ex);
}
String username = user.getText();
String password = pass.getText();
for (account a:accountCheck) {
if(a.getUsername().equals(username) && a.getPassword().equals(password)){
JPanel p = (JPanel)this.getParent();
CardLayout c = (CardLayout)p.getLayout();
c.show(p, PanelConstants.Home);
}
}
}
java.lang.UnsupportedOperationException: Not supported yet.
at boomiautomationapp.account.<init>(account.java:21)
at boomiautomationapp.LoginPage.populateAccount(LoginPage.java:50)
at boomiautomationapp.LoginPage.LoginActionPerformed(LoginPage.java:146)
at boomiautomationapp.LoginPage.access$000(LoginPage.java:28)
at boomiautomationapp.LoginPage$1.actionPerformed(LoginPage.java:94)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6516)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6281)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4872)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:747)
at java.awt.EventQueue.access$300(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:706)
at java.awt.EventQueue$3.run(EventQueue.java:704)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:720)
at java.awt.EventQueue$4.run(EventQueue.java:718)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:717)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
I am having trouble in checking the username in the ms access database
java.sql.SQLException: No data found
here is the database connect
public class dbAccess
{
Connection conn;
ResultSet rs;
Statement s;
PreparedStatement ps;
public void doConnect()
{
try
{
String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
Class.forName(driver);
String login = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=E:\\File Kuliah\\Semester 7\\AOOP\\JavaApplication1\\build\\classes\\Database1.accdb";
conn = DriverManager.getConnection(login);
System.out.println("Connected");
}
catch(Exception ex)
{
ex.printStackTrace();
}
}
}
and here is the code that has the error
private void registerButtonActionPerformed(java.awt.event.ActionEvent evt) {
try
{
db.ps = db.conn.prepareStatement("SELECT * FROM DatabaseAOOP");
db.rs = db.ps.executeQuery();
System.out.print("1");
while(db.rs.next())
{
if(userRegis.getText().equals(db.rs.getString("username")))
{
System.out.print("3");
JOptionPane.showMessageDialog(this, "Username is already exists !");
userRegis.setText("");
passRegis.setText("");
//db.rs=null;
//db.ps=null;
break;
}
else if(userRegis.getText().isEmpty())
{
JOptionPane.showMessageDialog(this, "Please input the name");
}
else if(!userRegis.getText().equals(db.rs.getString("username")))
{
JOptionPane.showMessageDialog(this, "Searching ...");
}
else
{
System.out.print("2");
db.ps = db.conn.prepareStatement("INSERT INTO DatabaseAOOP(username,password) VALUES(?,?)");
db.s = db.conn.createStatement();
db.ps.setString(1, userRegis.getText());
db.ps.setString(2, passRegis.getText());
db.ps.executeUpdate();
JOptionPane.showMessageDialog(this, "Thank you for registering !");
userRegis.setText("");
passRegis.setText("");
break;
}
}
}
catch(Exception ex)
{
ex.printStackTrace();
System.out.println(ex);
}
}
here are the printstacktrace
at sun.jdbc.odbc.JdbcOdbc.SQLGetDataString(JdbcOdbc.java:3914)
at sun.jdbc.odbc.JdbcOdbcResultSet.getDataString(JdbcOdbcResultSet.java:5697)
at sun.jdbc.odbc.JdbcOdbcResultSet.getString(JdbcOdbcResultSet.java:353)
at sun.jdbc.odbc.JdbcOdbcResultSet.getString(JdbcOdbcResultSet.java:410)
at Frame.registerButtonActionPerformed(Frame.java:277)
at Frame.access$600(Frame.java:4)
at Frame$7.actionPerformed(Frame.java:135)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6516)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
at java.awt.Component.processEvent(Component.java:6281)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4872)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:708)
at java.awt.EventQueue$4.run(EventQueue.java:706)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
actually i just checked the database connected, but there is no data found
Immediately after entering the while(db.rs.next()) loop you call db.rs.getString("username"), then later in the loop you call db.rs.getString("username") again. It is the second invocation that throws the "No data found" exception.
In many cases JDBC will only let us call get... methods once per column for a given (current) row in the ResultSet. You should save the value to a String
String theUserName = db.rs.getString("username");
and then use the String variable for your (multiple) comparisons.
My query :
SELECT COUNT(*)
FROM
(SELECT
dealerCode,
SUM(kg) AS totalKG,
SUM(price) AS totalPrice,
returnDate, BID
FROM meatReturns
GROUP BY BID, dealerCode, returnDate)
This works well in MS Access Query Design, but it does not work in JDBC.
The query gets a Syntax error in FROM clause in its ResultSet.
Any alternatives, or an explanation to this one?
UPDATE:
Here is my code:
private int getRowCount(String query){
int size = 0;
try {
query = query.replace(";", "");
query = "SELECT COUNT(*) FROM (" + query +") AS subQuery;";
System.out.println(query);
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String db = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=E:/EACA_AgroVentures1.accdb";
conn = DriverManager.getConnection(db);
stmt = conn.prepareStatement(query,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
ResultSet rs = stmt.executeQuery(); // ERROR HERE
rs.beforeFirst();
while(rs.next() && rs!=null){
size = rs.getInt(1);
System.out.println("Size : "+size);
}
} catch (ClassNotFoundException ex) {
ex.printStackTrace();
} catch (SQLException ex) {
ex.printStackTrace();
}
return size;
}
and here is the ERROR CODE:
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver] Syntax error in FROM clause.
at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6964)
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7121)
at sun.jdbc.odbc.JdbcOdbc.SQLExecDirect(JdbcOdbc.java:3117)
at sun.jdbc.odbc.JdbcOdbcStatement.execute(JdbcOdbcStatement.java:337)
at sun.jdbc.odbc.JdbcOdbcStatement.executeQuery(JdbcOdbcStatement.java:252)
at sun.jdbc.odbc.JdbcOdbcResultSet.calculateRowCount(JdbcOdbcResultSet.java:6352)
at sun.jdbc.odbc.JdbcOdbcResultSet.initialize(JdbcOdbcResultSet.java:154)
at sun.jdbc.odbc.JdbcOdbcStatement.getResultSet(JdbcOdbcStatement.java:423)
at sun.jdbc.odbc.JdbcOdbcPreparedStatement.executeQuery(JdbcOdbcPreparedStatement.java:92)
at com.eaca.MainFrame.getRowCount(MainFrame.java:139)
at com.eaca.MainFrame.connectToDBWithRows(MainFrame.java:171)
at com.eaca.MainFrame.loadMR(MainFrame.java:350)
at com.eaca.MainFrame.access$600(MainFrame.java:65)
at com.eaca.MainFrame$ChangeTab.stateChanged(MainFrame.java:486)
at javax.swing.JTabbedPane.fireStateChanged(JTabbedPane.java:416)
at javax.swing.JTabbedPane$ModelListener.stateChanged(JTabbedPane.java:270)
at javax.swing.DefaultSingleSelectionModel.fireStateChanged(DefaultSingleSelectionModel.java:132)
at javax.swing.DefaultSingleSelectionModel.setSelectedIndex(DefaultSingleSelectionModel.java:67)
at javax.swing.JTabbedPane.setSelectedIndexImpl(JTabbedPane.java:616)
at javax.swing.JTabbedPane.setSelectedIndex(JTabbedPane.java:591)
at javax.swing.plaf.basic.BasicTabbedPaneUI$Handler.mousePressed(BasicTabbedPaneUI.java:3644)
at java.awt.Component.processMouseEvent(Component.java:6502)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4489)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:708)
at java.awt.EventQueue$4.run(EventQueue.java:706)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 0
at com.eaca.MainFrame.connectToDBWithRows(MainFrame.java:185)
at com.eaca.MainFrame.loadMR(MainFrame.java:350)
at com.eaca.MainFrame.access$600(MainFrame.java:65)
at com.eaca.MainFrame$ChangeTab.stateChanged(MainFrame.java:486)
at javax.swing.JTabbedPane.fireStateChanged(JTabbedPane.java:416)
at javax.swing.JTabbedPane$ModelListener.stateChanged(JTabbedPane.java:270)
at javax.swing.DefaultSingleSelectionModel.fireStateChanged(DefaultSingleSelectionModel.java:132)
at javax.swing.DefaultSingleSelectionModel.setSelectedIndex(DefaultSingleSelectionModel.java:67)
at javax.swing.JTabbedPane.setSelectedIndexImpl(JTabbedPane.java:616)
at javax.swing.JTabbedPane.setSelectedIndex(JTabbedPane.java:591)
at javax.swing.plaf.basic.BasicTabbedPaneUI$Handler.mousePressed(BasicTabbedPaneUI.java:3644)
at java.awt.Component.processMouseEvent(Component.java:6502)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4489)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:708)
at java.awt.EventQueue$4.run(EventQueue.java:706)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Your problem stems from the fact that
the subquery is an aggregation query (with SUM() functions and a GROUP BY clause) so the result set returned by the Access Database Engine is not updatable, and
in your prepareStatement call you specify ResultSet.TYPE_SCROLL_SENSITIVE.
Those conditions conflict with each other, causing an error. Try this instead:
stmt = conn.prepareStatement(query,
ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
ResultSet rs = stmt.executeQuery();
// rs.beforeFirst(); // (disabled)
I am using Netbeans IDE to develop a desktop Java App. I have an embedded Derby database which has a few tables. All of the tables are in the APP schema. The problem I am having is that a query I am making to the DB is coming back with the above exception. I know the table exists and if I run the exact same SQL query from inside the editor it functions as expected. I am looking for help with the problem but more so looking for help as to how you would troubleshoot a problem like this. I have attached some code and the stack trace. Please don't hesitate to ask for more info if it will help
public static void doKeywordListDisplayLogic() {
try {
SimpleQuery keywordIdQuery = new SimpleQuery();
keywordIdQuery.setSelectExpressionList("*");
keywordIdQuery.setDataSource("KEYWORD_LOOKUP");
keywordIdQuery.setWherePredicates("SDS_NUMBER");
keywordIdQuery.setComparisonOperator("=");
keywordIdQuery.setQueryPredicate(selectedSdsNumber);//selectedSdsNumber comes from a previous query and table row selection.
keywordIdQuery.simpleQuery();
String keyId = rs.getString("KEY_ID");
System.out.println(keyId);
} catch (Exception e) {
e.printStackTrace();
}
}
public void simpleQuery() {
try {
conn = DbCommunication.JavaConnect.ConnectDb();
String dbQuery = "SELECT ".concat(selectExpressionList).concat(" FROM ").concat(dataSource).concat(" WHERE ").concat(wherePredicates).concat(" ").concat(comparisonOperator).concat(" ").concat(queryPredicate);
System.out.println(dbQuery);
PreparedStatement pst = conn.prepareStatement(dbQuery);
rs = pst.executeQuery();
} catch (Exception e) {
e.printStackTrace(System.out);
JOptionPane.showMessageDialog(null, e);
}
}
***THE SELECT SQL QUERY BELOW IS THE FINAL STRING SUBMITTED TO THE DB***
SELECT * FROM LOCATION_LOOKUP WHERE SDS_NUMBER = 998
java.sql.SQLException: There is no column named: KEY_ID.
at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown Source)
at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
at org.apache.derby.client.am.ResultSet.getString(Unknown Source)
at RecordHandling.PopulateRecord.doKeywordListDisplayLogic(PopulateRecord.java:264)
at RecordHandling.PopulateRecord.doRowRetrieval(PopulateRecord.java:202)
at Gui.mainFrame.jButton7ActionPerformed(mainFrame.java:717)
at Gui.mainFrame.access$400(mainFrame.java:25)
at Gui.mainFrame$5.actionPerformed(mainFrame.java:232)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:708)
at java.awt.EventQueue$4.run(EventQueue.java:706)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Caused by: org.apache.derby.client.am.SqlException: There is no column named: KEY_ID.
at org.apache.derby.client.am.ColumnMetaData.findColumnX(Unknown Source)
at org.apache.derby.client.am.ResultSet.findColumnX(Unknown Source)
... 42 more
There is no column named: KEY_ID
Instead of retrieving using column name,
String keyId = rs.getString("KEY_ID");
try retrieve using index:
String keyId = rs.getString(indexOfKeyId);//if key_id is at column 2 in table, then rs.getString(2)
To troubleshoot, display all value from rs, and see if your desired output(key id) is there.
My Why this exception occur?
public String setIDAndInsert(String fName, String lName, String gender, String date) {
String id = null;
ResultSet res;
try {
Connection con;
PreparedStatement pStatement;
String query = "insert into Users(FirstName,LastName,Gender,Date) " +
"values ( '" + fName + "' , '" + lName + "' , '" + gender + "', '" + date + "' ) ";
con = DriverManager.getConnection(...);
pStatement = con.prepareStatement(query, Statement.RETURN_GENERATED_KEYS);
pStatement.execute(query);
res = pStatement.getGeneratedKeys();
while (res.next()) {
id = String.valueOf(res.getInt(1));
}
} catch (SQLException sqle) {
sqle.printStackTrace();
}
return id;
}
Previously this method works correctly, I don't know why now hasn't work!
My table in console:
java.sql.SQLException: Failed to read auto-increment value from storage engine
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2536)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2465)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:734)
at Project.UserPage_Admin.setIDAndInsert(UserPage_Admin.java:145)
at Project.UserPage_Admin.addAction(UserPage_Admin.java:127)
at Project.UserPage_Admin.actionPerformed(UserPage_Admin.java:114)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:682)
at java.awt.EventQueue$3.run(EventQueue.java:680)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:696)
at java.awt.EventQueue$4.run(EventQueue.java:694)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Try this:
ALTER TABLE `table_name` AUTO_INCREMENT = 1