Develop Reference

Unable to locate tables in Derby database

I can't work out why the following program is unable to locate tables in my derby database:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
public class NdConnect
{
public final static String SETUP_FILE_PATH = "/AppData/Local/NewdawnTest";
private static final String CONNECTION_URL = "jdbc:derby:" + "C:/Users/" + System.getenv("USERNAME") + SETUP_FILE_PATH + "db" + ";create=true";
private static Connection conn = null;
private final static Properties dbProperties = new Properties();
private static PreparedStatement pstmtSelectTxns;
public static void connect() {
try {
conn = DriverManager.getConnection(CONNECTION_URL + ";create=true", dbProperties);
pstmtSelectTxns = conn.prepareStatement("SELECT * from TXNS");
System.out.println("Connected OK to " + CONNECTION_URL);
}
catch (SQLException sqle) {
System.out.println("SQL exception");
System.out.println("Connected NOK:The connection URL is " + CONNECTION_URL);
Logger.getLogger(NdConnect.class.getName()).log(Level.SEVERE, null, sqle);
}
}
public static void disconnect()
{
try {
if (conn != null) {
conn.close();
conn = null;
System.out.println("0048 NDC OK:DB closed ");
}
} catch (SQLException sqle) {
Logger.getLogger(NdConnect.class.getName()).log(Level.SEVERE, null, sqle);
}
}
public static void main(String[] args)
{
// NdConnect nd = new NdConnect();
NdConnect.connect();
NdConnect.disconnect();
// System.out.println("NdConnect finished");
}
}
The program throws a SQLSyntaxErrorException:
run:
SQL exception
Connected NOK:The connection URL is jdbc:derby:C:/Users/Administrator/AppData/Local/NewdawnTestdb;create=true
Nov 25, 2018 6:58:42 AM NdConnect connect
0048 NDC OK:DB closed
SEVERE: null
java.sql.SQLSyntaxErrorException: Table/View 'TXNS' does not exist.
at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement42.<init>(Unknown Source)
at org.apache.derby.jdbc.Driver42.newEmbedPreparedStatement(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
at NdConnect.connect(NdConnect.java:21)
at NdConnect.main(NdConnect.java:47)
Caused by: ERROR 42X05: Table/View 'TXNS' does not exist.
at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
at org.apache.derby.impl.sql.compile.FromBaseTable.bindTableDescriptor(Unknown Source)
at org.apache.derby.impl.sql.compile.FromBaseTable.bindNonVTITables(Unknown Source)
at org.apache.derby.impl.sql.compile.FromList.bindTables(Unknown Source)
at org.apache.derby.impl.sql.compile.SelectNode.bindNonVTITables(Unknown Source)
at org.apache.derby.impl.sql.compile.DMLStatementNode.bindTables(Unknown Source)
at org.apache.derby.impl.sql.compile.DMLStatementNode.bind(Unknown Source)
at org.apache.derby.impl.sql.compile.CursorNode.bindStatement(Unknown Source)
at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown Source)
... 7 more
However the database and table do exist. I have verified this by creating a connection to the database in Netbeans > Services. When I run this command in Services:
SELECT * from TXNS
the desired table is correctly displayed and the output window returns:
Executed successfully in 0 s.
Fetching resultset took 0.016 s.
Line 1, column 1
Execution finished after 0.254 s, no errors occurred.
Looking at the properties of this connection via Netbeans services shows the following attribute values:
Display name NewDawn – TEST DB
Database URL jdbc:derby:C:\Users\Administrator\AppData\Local\NewdawnTest\db
Driver apache_derby_embedded
Driver class org.apache.derby.jdbc.EmbeddedDriver
This seems to correspond to the setup I have in the java code example so I don't understand why the code doesn't work.

The URL is not the same:
In Netbeans: jdbc:derby:C:\Users\Administrator\AppData\Local\NewdawnTest\db
In Java: jdbc:derby:C:/Users/Administrator/AppData/Local/NewdawnTestdb;create=true
Change the CONNECTION_URL line to:
private static final String CONNECTION_URL = "jdbc:derby:" + "C:/Users/" + System.getenv("USERNAME") + SETUP_FILE_PATH + "/db"

Not able to establish connection with Progress Database using JDBC

I am getting the following exception :-
java.sql.SQLException: [DataDirect][OpenEdge JDBC Driver][OpenEdge] Access denied(Authorisation failed)
at com.ddtek.jdbc.openedge.client.ddd.aw(Unknown Source)
at com.ddtek.jdbc.openedge.client.ddd.j(Unknown Source)
at com.ddtek.jdbc.openedge.OpenEdgeImplConnection.j(Unknown Source)
at com.ddtek.jdbc.openedgebase.BaseConnection.b(Unknown Source)
at com.ddtek.jdbc.openedgebase.BaseConnection.k(Unknown Source)
at com.ddtek.jdbc.openedgebase.BaseConnection.b(Unknown Source)
at com.ddtek.jdbc.openedgebase.BaseConnection.a(Unknown Source)
at com.ddtek.jdbc.openedgebase.BaseDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at com.ncr.sj250216.JdbcTest.main(JdbcTest.java:18)
There is no compile time error in my code, i am using the right jars as referenced libraries.
package com.ncr.sj250216;
import java.sql.*;
public class JdbcTest
{
public static String
URL="jdbc:datadirect:openedge://sun3899.daytonoh.ncr.com:28409;DatabaseName=dispatch";
public static String username="CSMSRUP";
public static String password=null;
public static void main(String [] args)
{
try
{
Class.forName ("com.ddtek.jdbc.openedge.OpenEdgeDriver");
System.out.println("Driver loaded");
Connection conn = DriverManager.getConnection(URL,username,password);
System.out.println("Connected");
Statement stmt = conn.createStatement();
System.out.println("Statement created");
ResultSet rs = stmt.executeQuery("select remark from pub.dupdate_remarks");
System.out.println("ResultSet : \n");
while (rs.next())
{
System.out.println(rs.getString(1));
}
System.out.println("AFTER CRUISING THROUGH THE RESULT SET");
rs.close();
stmt.close();
conn.close();
}
catch (Exception x)
{
x.printStackTrace();
}
}
}

Access denied and Authorization failed mean that you either have the wrong userid & password or you are attempting to connect to the wrong db.
If you have access to the server that the db runs on you can test your credentials using Progress' sqlexp command line tool:
sqlexp -user userName -password passWord -db dnName -S servicePort
Or you could use any popular Windows based SQL querying tool to try the connection...

java.lang.ClassNotFoundException

I've installed MaxDB in my local machine and I'm trying to make a connection to it using Java.
And I'm getting this error when running :
Exception in thread "main"
java.lang.ClassNotFoundException:
com.sap.dbtech.jdbc.DriverSapDB
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sap.maxdb.Hello.main(Hello.java:15)
This is the code I'm using :
package sap.maxdb;
import java.sql.*;
public class Hello
{
public static void main(String[] args) throws ClassNotFoundException, SQLException
{
String username = "DBM";
String password = "azerty";
String dbname = "SAPDB";
Class.forName ("com.sap.dbtech.jdbc.DriverSapDB");
String url = "jdbc:sapdb://" + dbname;
Connection connection = DriverManager.getConnection (url, username, password);
Statement stmt = connection.createStatement ();
ResultSet resultSet = stmt.executeQuery ("SELECT * FROM HOTEL.CUSTOMER");
resultSet.next ();
String hello = resultSet.getString (1);
System.out.println (hello);
resultSet.close ();
stmt.close();
connection.close ();
}
}
I did like they said in their website :
set CLASSPATH=%CLASSPATH%;C:\Program
Files\sdb\programs\runtime\jar\sapdbc.jar
But I get always the same error.
I know that I'm missing something but can't find it °!°
Waiting for your help.
Thanks.

What does "install" mean? Basically, the db server must be installed and running.
Step two is to add the driver (which you can find under C:\Program Files\sdb\programs\runtime\jar\sapdbc.jar, assuming this applies to your installation too) to the build path of your project. If the driver class cannot be found, it'll raise a ClassNotFoundException as you experienced.
You don't mention which IDE you are using, but try to set your project buildpath from the context menu.

Try adding the following code to make sure that your application picks up the CLASSPATH that you specified:
Map<String, String> env = System.getenv();
for (String envName : env.keySet()) {
System.out.format("%s=%s%n", envName, env.get(envName));
}

Copy the driver's jar file to the 'lib' folder of the server. Then restart the server.

GWT Problem with MySQL Connection

I am working on a GWT project in which I need to make some MySQL queries. I have handled RPC properly and in the server-side I am trying to make a mysql connection but am running into an exception:
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_(Runtime.java:112)
at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance(Runtime.java:120)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1013)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2412)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2154)
at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:792)
at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_(Runtime.java:112)
at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance(Runtime.java:120)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:381)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
.
.
.
more
.
.
.
I created a very simple java class to test out my code to confirm that my connection syntax and use is proper, and have confirmed that syntax is not a problem because with the very same code in a simple only main method java app I can create a connection and query the database properly. I have made sure to have mysql-connector-java-5.1.16-bin.jar in the classpath as well as the /lib folder in the WEB-INF folder.
Here is the class that I am using in order to create a connection:
public class DB_Connection {
protected Connection getConnection() {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql:///",
"",
"");
}
catch (Exception ex)
{
ex.printStackTrace();
}
return conn;
}
}
public class Login extends DB_Connection {
public User getUser(String email) {
User user = new User();
user.setUserEmail(email);
String query = "";
try {
Connection conn = getConnection();
Statement statement = conn.createStatement();
ResultSet result = statement.executeQuery(query);
while(result.next()) {
user.setUserId(result.getInt("rvuser_id"));
System.out.println(user.getUserId());
}
}
catch (Exception ex)
{
ex.printStackTrace();
}
return user;
}
It seems my problem happens all the way at the beginning in DB_Connection. Does anyone know what is making this happen? It is strange to me, because as a standalone the code works fine.
Another thing I just realized that I am at home now and don't even have access to that database server as it is on a local network and I am not connected through VPN. So it must be failing somehow before it even attempts to make the connection.
Thanks!

com.google.appengine ..
Does it means you are deploying on Google App Engine?
If so, MySQL,JDBC and many other things are restricted.

How can I add a password to this JDBC:ODBC connection string that is trying to connect to an MS Access database

This is the connection string that is currently working on a non-password protected MS Access database.
this code snippet is from our properity file:
db.url = jdbc:odbc:Driver\={Microsoft Access Driver (*.mdb)};Dbq\=C:\Inventory.mdb;DriverID\=22;READONLY\=true
How do I add a password to this connection string for a MS Access DB protected by a database password (Non-ULS)?
Thanks!

Referenced from here: Java Support
db.url = jdbc:odbc:Driver\={Microsoft Access Driver (*.mdb)}Dbq\=C:\Inventory.mdb;DriverID\=22;READONLY\=true; UID\=me;PWD\=secret

To work on password protected MS Access Database 2003/2007 use the below code snippet
package jdbcExample;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class JDBCExampleOfMSAccess2007
{
public static void main(String[] args)
{
System.out.println("Start of Program");
Connection con = null;
Statement stmt = null;
ResultSet rs = null;
String url=null,userID=null,password=null;
String dbFileName=null;
String sql=null;
dbFileName = "C:\\temp\\MYTestDatabase.accdb";
userID = "Admin";
password = "Ganesh#123";
<b>url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};"+
"DBQ="+dbFileName+";"+
"Uid="+userID+";"+
"Pwd="+password+";"; </b>
sql = "SELECT * FROM tblUserProfile";
System.out.println("url = "+url);
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection(url,userID,password);
stmt = con.createStatement();
rs = stmt.executeQuery(sql);
if(rs!=null)
{
while(rs.next())
{
System.out.print("User ID = "+rs.getString("User ID"));
System.out.print(" User Name = "+rs.getString("User Name"));
System.out.print(" Password = "+rs.getString("Password"));
System.out.println(" Access Type = "+rs.getString("Access Type"));
}
rs.close();
}
}
catch(Exception e)
{
e.printStackTrace();
}
finally
{
try {
stmt.close();
con.close();
} catch (SQLException e) {
//e.printStackTrace();
}
}
System.out.println("End of Program");
}
}
My connection string url was
url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};"+
"DBQ="+dbFileName+";"+
"DriverID=22;READONLY=true;"+
"Uid="+userID+";"+
"Pwd="+password+";";
and I was facing one problem while connecting to MS Access Database the stack trace as below.
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver]General error Unable to open registry key Temporary (volatile) Ace DSN for process 0x162c Thread 0x1e98 DBC 0x38f5924 Jet'.
at sun.jdbc.odbc.JdbcOdbc.createSQLException(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.standardError(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.SQLDriverConnect(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcConnection.initialize(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at jdbc.JDBCForMSAccess2007.main(JDBCExampleOfMSAccess2007 .java:37)
To overcome this problem simply I removed the "DriverID=22;READONLY=true;" in url string and the problem get solved :)
The given code snippet I have tested on password protected MS Access 2003 and 2007 Database and work well.
Hope that it will helpful to do new experiment.

I know you're asking for ODBC, but is it impossible to use OLEDB, as in the connect string provided on ConnectionStrings.com:
Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\mydatabase.mdb;Jet OLEDB:Database Password=MyDbPassword;
I don't know that the Jet ODBC driver provides any support for database passwords, which were not introduced until Jet 4 (and are completely worthless in any version of Access/Jet/ACE).