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Date: Thu, 27 Jul 2006 21:57:13 -0700 (PDT)
From: "Rajesh Kartha (JIRA)" <derby-dev@db.apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Created: (DERBY-1604) NPE  in ij while attempting to execute
 a query after a failed named connection creation
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NPE  in ij while attempting to execute a query after a failed named connection creation
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                 Key: DERBY-1604
                 URL: http://issues.apache.org/jira/browse/DERBY-1604
             Project: Derby
          Issue Type: Bug
          Components: Tools
    Affects Versions: 10.1.3.1, 10.1.3.0, 10.1.2.1, 10.1.1.0, 10.0.2.1, 10.0.2.0, 10.0.2.2
         Environment: Windows 2000, jdk 1.5
            Reporter: Rajesh Kartha
            Priority: Minor


 I came across this by chance. While attempting to execute a statement after a failed named connection, ij throws a NPE. Following are ij steps
that reproduces this error:

ij version 10.2
ij> connect 'jdbc:derby:grntrvkdb;create=true' user 'raj' as raj;
WARNING 01J01: Database 'grntrvkdb' not created, connection made to existing database instead.
ij> show connections;
RAJ* -  jdbc:derby:grntrvkdb
* = current connection
ij> connect 'jdbc:derby:grntrvkdb;create=true' user 'raj2' as raj2;
WARNING 01J01: Database 'grntrvkdb' not created, connection made to existing database instead.
ij(RAJ2)> show connections;
RAJ -   jdbc:derby:grntrvkdb
RAJ2* -         jdbc:derby:grntrvkdb
* = current connection
ij(RAJ2)> disconnect;
ij> show connections;
RAJ -   jdbc:derby:grntrvkdb
No current connection
ij> connect 'jdbc:derby:grntrvkdb;create=true' user 'raj' as raj;
IJ ERROR: Already have a connection named RAJ
org.apache.derby.impl.tools.ij.ijException: Already have a connection named RAJ
        at org.apache.derby.impl.tools.ij.ijException.alreadyHaveConnectionNamed
(ijException.java:78)
        at org.apache.derby.impl.tools.ij.ij.addSession(ij.java:418)
        at org.apache.derby.impl.tools.ij.ij.dynamicConnection(ij.java:875)
        at org.apache.derby.impl.tools.ij.ij.ConnectStatement(ij.java:723)
        at org.apache.derby.impl.tools.ij.ij.ijStatement(ij.java:553)
        at org.apache.derby.impl.tools.ij.utilMain.go(utilMain.java:289)
        at org.apache.derby.impl.tools.ij.Main.go(Main.java:207)
        at org.apache.derby.impl.tools.ij.Main.mainCore(Main.java:173)
        at org.apache.derby.impl.tools.ij.Main14.main(Main14.java:55)
        at org.apache.derby.tools.ij.main(ij.java:60)
ij> show connections;
RAJ -   jdbc:derby:grntrvkdb
No current connection
ij> select * from sys.systables;
JAVA ERROR: java.lang.NullPointerException
java.lang.NullPointerException
        at org.apache.derby.impl.tools.ij.ij.executeImmediate(ij.java:289)
        at org.apache.derby.impl.tools.ij.utilMain.doCatch(utilMain.java:433)
        at org.apache.derby.impl.tools.ij.utilMain.go(utilMain.java:312)
        at org.apache.derby.impl.tools.ij.Main.go(Main.java:207)
        at org.apache.derby.impl.tools.ij.Main.mainCore(Main.java:173)
        at org.apache.derby.impl.tools.ij.Main14.main(Main14.java:55)
        at org.apache.derby.tools.ij.main(ij.java:60)
ij>

I expected an error like "IJ ERROR: Unable to establish connection"  since there does not exist any connection
to execute this statement.


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