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Date: Mon, 18 Feb 2008 16:02:38 -0800 (PST)
From: "A B (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Commented: (DERBY-3094) Grouping of expressions causes
 NullPointerException
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    [ https://issues.apache.org/jira/browse/DERBY-3094?page=3Dcom.atlassian=
.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D1257=
0055#action_12570055 ]=20

A B commented on DERBY-3094:
----------------------------

> It's not clear to me whether [two of the test cases in
> GroupByExpressionTest.java] are valid or not,

I have not yet had a chance to look at the patch, but I ran those two queri=
es--along with all of the queries posted in your Feb 17 comment--against DB=
2 v8.  From what I can tell, the (clean) Derby trunk and DB2 v8 agree in al=
l of these cases--i.e. they either both throw an error or they return the s=
ame results (with the notable exception of the NPE that this issue is tryin=
g to fix).  Not sure if that's helpful or not...

> Grouping of expressions causes NullPointerException
> ---------------------------------------------------
>
>                 Key: DERBY-3094
>                 URL: https://issues.apache.org/jira/browse/DERBY-3094
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.3.1.4
>         Environment: Windows XP, Eclipse 3.2.2, java 1.5.0.11
>            Reporter: Peter Balon
>            Assignee: Bryan Pendleton
>            Priority: Critical
>         Attachments: modifyVisitorDoesntWork.diff, twoPass.diff
>
>
> Following steps to reproduce the bug:
> create table xx (a double, b double);
> insert into xx values (2, 3);
> select a, a*(b/100.000000), count(*) from xx  group by a, a*(b/100.000000=
);
> Starting run
> select a, a*(b/100.000000), count(*) from xx=20
> group by a, a*(b/100.000000)
> Run successful
> SQL State =3D 38000 SQL Code =3D 20000 SQL Message =3D Bei der Auswertung=
 eines Ausdrucks wurde die Ausnahme 'java.lang.NullPointerException' ausgel=
=C3=B6st. Exception message =3D java.sql.SQLException: Bei der Auswertung e=
ines Ausdrucks wurde die Ausnahme 'java.lang.NullPointerException' ausgel=
=C3=B6st.
> Work around:
> select a, a*(b/100.000000), count(*) from xx group by a, b, a*(b/100.0000=
00)=20
> Stack trace from application:
> java.sql.SQLException: Bei der Auswertung eines Ausdrucks wurde die Ausna=
hme 'java.lang.NullPointerException' ausgel=C3=B6st.
> =09at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unkn=
own Source)
> =09at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source=
)
> =09at org.apache.derby.impl.jdbc.Util.seeNextException(Unknown Source)
> =09at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLExcepti=
on(Unknown Source)
> =09at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(=
Unknown Source)
> =09at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown =
Source)
> =09at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown =
Source)
> =09at org.apache.derby.impl.jdbc.EmbedResultSet.closeOnTransactionError(U=
nknown Source)
> =09at org.apache.derby.impl.jdbc.EmbedResultSet.movePosition(Unknown Sour=
ce)
> =09at org.apache.derby.impl.jdbc.EmbedResultSet.next(Unknown Source)
> =09at de.arcor.billy.report.views.designer.ReportViewerView.setInput(Repo=
rtViewerView.java:255)
> =09at de.arcor.billy.report.views.designer.ReportViewerView.createPartCon=
trol(ReportViewerView.java:113)
> =09at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReferenc=
e.java:332)
> =09at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java=
:197)
> =09at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPar=
tReference.java:566)
> =09at org.eclipse.ui.internal.Perspective.showView(Perspective.java:1675)
> =09at org.eclipse.ui.internal.WorkbenchPage.busyShowView(WorkbenchPage.ja=
va:987)
> =09at org.eclipse.ui.internal.WorkbenchPage.access$13(WorkbenchPage.java:=
968)
> =09at org.eclipse.ui.internal.WorkbenchPage$13.run(WorkbenchPage.java:351=
4)
> =09at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:6=
7)
> =09at org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:3=
511)
> =09at de.arcor.billy.report.data.ReportDataAdvisor$2.perspectiveChanged(R=
eportDataAdvisor.java:268)
> =09at de.arcor.billy.system.actions.AbstractOpenPerspectiveActionDelegate=
$1.run(AbstractOpenPerspectiveActionDelegate.java:66)
> =09at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
> =09at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.=
java:123)
> =09at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3325)
> =09at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2971)
> =09at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1930)
> =09at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1894)
> =09at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.j=
ava:422)
> =09at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149=
)
> =09at de.arcor.billy.product.Billy.run(Billy.java:15)
> =09at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformA=
ctivator.java:78)
> =09at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApp=
lication(EclipseAppLauncher.java:92)
> =09at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(=
EclipseAppLauncher.java:68)
> =09at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.=
java:400)
> =09at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.=
java:177)
> =09at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> =09at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> =09at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> =09at java.lang.reflect.Method.invoke(Unknown Source)
> =09at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
> =09at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
> =09at org.eclipse.core.launcher.Main.run(Main.java:977)
> =09at org.eclipse.core.launcher.Main.main(Main.java:952)
> Caused by: java.sql.SQLException: Java-Ausnahme: ': java.lang.NullPointer=
Exception'.
> =09at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unkn=
own Source)
> =09at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source=
)
> =09at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)
> =09at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLExcepti=
on(Unknown Source)
> =09... 42 more
> Caused by: java.lang.NullPointerException
> =09at org.apache.derby.exe.ac9b638174x0115x5f93x1332x0000046fd8a01b.e10(U=
nknown Source)
> =09at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> =09at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> =09at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> =09at java.lang.reflect.Method.invoke(Unknown Source)
> =09at org.apache.derby.impl.services.reflect.ReflectMethod.invoke(Unknown=
 Source)
> =09at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.doProjec=
tion(Unknown Source)
> =09at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.getNextR=
owCore(Unknown Source)
> =09at org.apache.derby.impl.sql.execute.ScrollInsensitiveResultSet.getNex=
tRowFromSource(Unknown Source)
> =09at org.apache.derby.impl.sql.execute.ScrollInsensitiveResultSet.getNex=
tRowCore(Unknown Source)
> =09at org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.getNextRo=
w(Unknown Source)
> =09... 37 more

--=20
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