Problem with getImportedKeys() in MySQL

Hi everyone,
I am using JDK1.5.0 and the jdbc "mysql-connector-java-3.0.16"
I've been trying to get the foreign keys from a MySQL 4.1 database using the getImportedKeys() method of the DatabaseMetaData class,but the method returns a ResultSet,which is null!
However, I noticed that the getPrimaryKeys() method (which needs the same arguments as the getImportedKeys() one) works just fine and that puzzles me.
Can anybody help me? Is this a known bug of MySQL?
Thanks in advance.

Indeed,previous MySQL versions did not support foreign keys...
However,MySQL Server 4.1 allows foreign keys as you can see:
CREATE TABLE `companies` (
`Company_Id` int(6) unsigned NOT NULL auto_increment,
`Name` varchar(11) default NULL,
`Artist_Id` int(6) unsigned NOT NULL default '0',
PRIMARY KEY (`Company_Id`),
KEY `Artist_Id` (`Artist_Id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO `companies` VALUES (1,'heaven',1);
INSERT INTO `companies` VALUES (2,'emi',3);
# Foreign keys for table companies
ALTER TABLE `companies`
ADD FOREIGN KEY (`Artist_Id`) REFERENCES `artists` (`Artist_Id`);
Any further help? :-)

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                sb.append(") VALUES (").append("\n");
                sb.append("'").append(rss.getString("PFIRM")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("POFFIC")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PACCT")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PRR")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PEXCH")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSUBEX")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PFC")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSYMBL")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PCLASS")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSUBCL")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSUBTY")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSDSC1")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PCTYM")).append("'").append(",").append("\n");
                sb.append(rss.getString("PSTRIK")).append(",").append("\n");
                sb.append(rss.getString("PCLOSE")).append(",").append("\n");
                sb.append(rss.getString("PUNDCP")).append(",").append("\n");
                sb.append("'").append(rss.getString("PCURSY")).append("'").append(",").append("\n");
                sb.append("'").append(df_t.format(df_s.parse(rss.getString("PEXPDT")))).append("'").append(",").append("\n");
                sb.append("'").append(df_t.format(df_s.parse(rss.getString("PLTDAT")))).append("'").append(",").append("\n");
                sb.append(rss.getString("PMULTF")).append(",").append("\n");
                sb.append("'").append(rss.getString("PPTYPE")).append("'").append(",").append("\n");
                //sb.append(rss.getString("PBS")).append(",");
                sb.append("1").append(",").append("\n");
                sb.append("1").append(",").append("\n");
                sb.append("1").append(",").append("\n");
                sb.append(rss.getString("OPTION_PREMIUM")).append("").append("\n");
                // sb.append(df_t.format(df_s.parse(rss.getString("PTDATE")))).append(",");
                sb.append(") ").append("\n");
                System.out.println(sb.toString());
                //     stat_target.executeUpdate(sb.toString());
                stat_target.addBatch(sb.toString());
//        stat_target.executeUpdate(sb.toString());
                if (i == 2) {
                    break;
            stat_target.executeBatch();
            con_target.commit();
        } catch (BatchUpdateException be) {
            System.out.println("be: "+be.getErrorCode());
            System.out.println("be: "+be.getMessage());
            be.printStackTrace();
            System.out.println("be: "+i);
        } catch (SQLException se) {
            System.out.println("se: "+se.getErrorCode());
            System.out.println("se: "+i);
}

What is the error message?
I advice you to use prepared statement for batch inserting.

Problems with ACS4 and MySQL Server

Hi,
I am using acs4 with MySQL Server 5.0.67 as database under Windows. It all works fine except that very often I get a deadlock exception using the admin console.
Here is what is logged in the admin.log:
23 Apr 2009 12:20:15,231 TRACE DefaultSQLDatabaseRecordEnumerator: SELECT resourceid, voucherid, encryptionkey, permissions, defaultitem FROM resourcekey WHERE resourceid = ?
23 Apr 2009 12:20:15,231 TRACE DefaultSQLDatabaseRecordEnumerator:   obj 1 = acc14cde-ea85-4f29-82ef-a771438bbcfc
23 Apr 2009 12:20:15,262 ERROR DefaultSQLDatabaseConnection: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
23 Apr 2009 12:20:15,262 TRACE DefaultSQLDatabaseConnection: rollback
23 Apr 2009 12:20:15,262 ERROR AdeptServlet: database error [192.168.2.101]
com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
    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.mysql.jdbc.Util.handleNewInstance(Util.java:406)
    at com.mysql.jdbc.Util.getInstance(Util.java:381)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1045)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3515)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3447)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2554)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1761)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2046)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1964)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1949)
    at com.adobe.adept.persist.DefaultSQLDatabaseConnection.deleteExpired(DefaultSQLDatabaseConn ection.java:479)
    at com.adobe.adept.shared.security.DistributorNonceUtil.checkNonce(DistributorNonceUtil.java :56)
    at com.adobe.adept.admin.servlet.ManagePersistent.doPost(ManagePersistent.java:291)
    at com.adobe.adept.admin.servlet.ManagePersistent.doPost(ManagePersistent.java:40)
    at com.adobe.adept.servlet.AdeptServlet.doPost(AdeptServlet.java:184)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j ava:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.ja va:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Unknown Source)
23 Apr 2009 12:20:15,278 TRACE AdeptServlet: request end http://...
MySql is using InnoDB as storage engine.

yes, you can do this via the admin gui by modifying the http listener port.
You can also do this via the cli commandline as well http-listener-1 is the one you want to change the port for.
http://docs.sun.com/source/817-6088/httpservice.html has details

Problems with connecting to mySQL

Hi,
I'm using JSP for web development and I want to use mySQL as my database.
My problem is:
When trying to create a new instant
Class.forName("com.mysql.jdbc.Driver").newInstance();
I get the following exception:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
Please note that I'm using NetBeans as my IDE. The IDE itself successfully connects to mySQL and gets the schema.
Anybody helps?

I get below error on excecuting the code.
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1913) at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:501) at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:971) at com.mysql.jdbc.Connection.createNewIO(Connection.java:2644) at com.mysql.jdbc.Connection.(Connection.java:1531) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266) at java.sql.DriverManager.getConnection(DriverManager.java:512) at java.sql.DriverManager.getConnection(DriverManager.java:171) at org.apache.jsp.tracker_jsp._jspService(tracker_jsp.java:59) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929) at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683) at java.lang.Thread.run(Thread.java:534) ** END NESTED EXCEPTION ** Last packet sent to the server was 0 ms ago.
Please let me know how to resolve the same.

Performance problems with JDBC and mysql

Hi,
I have here a "one table" database which has 1.000.000 data rows. The problem is, that deleting a special entry (ie delete from mytable where da_value="foo1") takes between 10 and 60 seconds.
Does anyone can help me out of this performance trap.
LoCal

table indexed and keys used?
always preferred postgres! :)

Problems with connecting my Mysql db to visual studio 2013

Hey all,
I tried connecting my MYSQL db to my visual studio 2013
after installing all db connectors from MYSQL and tried following multiple guides its still not working.
I first had VS Express but it seems the express versions don't support that so then i went to get a VS Professional 2013 (trial i think) and this didn't work either.
Does anyone know any solution other than installing connectors (reinstalled them like 2 times already) or getting another VS ?
Thanks in advance

Hi Weffke,
The forum supports VS setup and installation. And I think your issue isn't related to the forum.
>>after installing all db connectors from MYSQL and tried following multiple guides its still not working.
I think your issue is more about MYSQL. So I suggest you post your issue to the related forum below.
http://forums.mysql.com/list.php?174
I will move the thread to off-topic forum. Thanks for your understanding.
Regards.
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Problem with getImportedKeys() in MySQL

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