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MarcioLima
 Post subject: Ordering a COUNT() column
PostPosted: Thu Apr 14, 2005 2:22 pm 
Newbie

Joined: Fri Aug 06, 2004 8:10 am
Posts: 9
Location: Brazil
Hibernate version:2.1.6

I have a result query with a aggregate function COUNT():

"select u.iduser, count(u.iduser) from users u"

I need to order this query by the COUNT() column. Is that possible? How can i apply the ORDER BY clause on this column?

TIA

Marcio.
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snpesnpe
 Post subject:
PostPosted: Fri Apr 15, 2005 8:25 am 
Expert
Expert

Joined: Sat Jun 12, 2004 4:49 pm
Posts: 915
try it - it is possible in hibernate 3

regards
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drj
 Post subject:
PostPosted: Fri Apr 15, 2005 3:14 pm 
Expert
Expert

Joined: Fri Nov 07, 2003 4:24 am
Posts: 315
Location: Cape Town, South Africa
Two things:
You may want to group by the aggregate column:
Code:
"select u.iduser, count(u.iduser) from users u group by u.iduser"

and you may want to alias your column selection.
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lukasbradley
 Post subject:
PostPosted: Tue May 03, 2005 2:03 pm 
Regular
Regular

Joined: Sun Sep 26, 2004 9:27 pm
Posts: 75
Location: Atlanta, GA, USA
I can't seem to get this to work. ClubMember has a many-to-one link back to Club.

Code:
select members.club, count(members.id) memTotal from ClubMember members group by members.club order by memTotal


Produces the following error using Eclipse Hibernate Console with 3.0.2:

Code:
org.hibernate.QueryException: , expected in SELECT [select members.club, count(members.id) memTotal from p2p.common.clubs.ClubMember members group by members.club order by memTotal ]
   at org.hibernate.hql.classic.SelectParser.token(SelectParser.java:175)
   at org.hibernate.hql.classic.ClauseParser.token(ClauseParser.java:86)
   at org.hibernate.hql.classic.ClauseParser.end(ClauseParser.java:113)
   at org.hibernate.hql.classic.PreprocessingParser.end(PreprocessingParser.java:122)
   at org.hibernate.hql.classic.ParserHelper.parse(ParserHelper.java:30)
   at org.hibernate.hql.classic.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:172)
   at org.hibernate.hql.classic.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:148)
   at org.hibernate.impl.SessionFactoryImpl.getQuery(SessionFactoryImpl.java:410)
   at org.hibernate.impl.SessionImpl.getQueries(SessionImpl.java:987)
   at org.hibernate.impl.SessionImpl.find(SessionImpl.java:964)
   at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74)
   at org.hibernate.console.HQLQueryPage.getList(HQLQueryPage.java:30)
   at org.hibernate.eclipse.console.views.QueryPageViewer$ContentProviderImpl.getElements(QueryPageViewer.java:74)
   at org.eclipse.jface.viewers.StructuredViewer.getRawChildren(StructuredViewer.java:765)
   at org.eclipse.jface.viewers.TableViewer.getRawChildren(TableViewer.java:1046)
   at org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:707)
   at org.eclipse.jface.viewers.StructuredViewer.getSortedChildren(StructuredViewer.java:822)
   at org.eclipse.jface.viewers.TableViewer.internalRefreshAll(TableViewer.java:762)
   at org.eclipse.jface.viewers.TableViewer.internalRefresh(TableViewer.java:712)
   at org.eclipse.jface.viewers.TableViewer.internalRefresh(TableViewer.java:701)
   at org.eclipse.jface.viewers.StructuredViewer$7.run(StructuredViewer.java:1171)
   at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1108)
   at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1169)
   at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1128)
   at org.eclipse.jface.viewers.TableViewer.inputChanged(TableViewer.java:662)
   at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:248)
   at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1324)
   at org.hibernate.eclipse.console.views.QueryPageViewer.createTable(QueryPageViewer.java:168)
   at org.hibernate.eclipse.console.views.QueryPageViewer.createControl(QueryPageViewer.java:147)
   at org.hibernate.eclipse.console.views.QueryPageViewer.<init>(QueryPageViewer.java:105)
   at org.hibernate.eclipse.console.views.QueryPageTabView.rebuild(QueryPageTabView.java:78)
   at org.hibernate.eclipse.console.views.QueryPageTabView$1.contentsChanged(QueryPageTabView.java:47)
   at org.hibernate.eclipse.console.views.QueryPageTabView$1.intervalAdded(QueryPageTabView.java:52)
   at javax.swing.AbstractListModel.fireIntervalAdded(AbstractListModel.java:130)
   at org.hibernate.console.QueryPageModel.add(QueryPageModel.java:50)
   at org.hibernate.console.KnownConfigurations$3.queryPageCreated(KnownConfigurations.java:167)
   at org.hibernate.console.ConsoleConfiguration.fireQueryPageCreated(ConsoleConfiguration.java:265)
   at org.hibernate.console.ConsoleConfiguration.executeHQLQuery(ConsoleConfiguration.java:246)
   at org.hibernate.eclipse.console.actions.ExecuteHQLAction.execute(ExecuteHQLAction.java:99)
   at org.hibernate.eclipse.console.actions.ExecuteHQLAction.run(ExecuteHQLAction.java:94)
   at org.eclipse.jface.action.Action.runWithEvent(Action.java:996)
   at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:538)
   at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:488)
   at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:441)
   at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
   at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:842)
   at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2894)
   at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2527)
   at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1570)
   at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1534)
   at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:306)
   at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
   at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103)
   at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:228)
   at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
   at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:156)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:324)
   at org.eclipse.core.launcher.Main.invokeFramework(Main.java:315)
   at org.eclipse.core.launcher.Main.basicRun(Main.java:268)
   at org.eclipse.core.launcher.Main.run(Main.java:942)
   at org.eclipse.core.launcher.Main.main(Main.java:926)
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lukasbradley
 Post subject:
PostPosted: Tue May 03, 2005 3:30 pm 
Regular
Regular

Joined: Sun Sep 26, 2004 9:27 pm
Posts: 75
Location: Atlanta, GA, USA
In the end, this is the SQL I'm looking for, which functions correctly:

Code:
select member.clubId, count(member.id) as counter from ClubMember member group by member.clubId order by counter desc limit 5


The following HQL works correctly, but does not have an order by clause:

Code:
select members.club, count(members) from ClubMember members group by members.club limit 5


Most queries I attempt give the ", expected" error. The following queries give a different result.

Code:
select members.club, count(members) from ClubMember members group by members.club order by count(members) desc limit 5


Error is:

Code:
java.sql.SQLException: Invalid use of group function
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