Read more on indexes here: http://code.google.com/appengine/docs/java/datastore/queriesandindexes.html#Introducing_Indexes
For more complex queries, you may have to define an index. If you run your application in the local development server, it should generate the needed index for you, then when you deploy your application, your index should automatically start building. You can check this by clicking "Indexes" in your app's Admin Console. - Jason On Fri, Sep 18, 2009 at 11:47 AM, sprooooz <[email protected]>wrote: > > Thanks for your answers guys, > > actually I ran the exact same query as you bcottam, but as soon as I > add other parameters in the query(like "&& field1==param1"), a > DatastoreNeedIndexException is thrown every time. > any idea why? > > On 18 sep, 16:56, bcottam <[email protected]> wrote: > > I do this quite a bit in my app. > > Basically I make a query like this: > > Query q = pm.newQuery(MyClass.class, "myDate >= :firstDateParam && > > myDate <= :secondDateParam"); > > Map<String, Object> params = new HashMap<String, Object>(); > > params.put("firstDateParam", startDate); > > params.put("secondDateParam", endDate); > > q.executeWithMap(params); > > > > I typed this on my phone, so I may have bitchered some meathod > > signatures, but this is about what I am doing. Hope it helps. > > > > On Sep 18, 12:44 am, sproooooz <[email protected]> wrote: > > > > > > > > > I am trying to write a JDO query where an entity field java.util.Date > > > "DATEFIELD" is between 2 others java.util.Date parameters...but can > > > not succeed > > > Has anybody tried this before? > > > > > that would be a big help.... > > > > > Steve > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~----------~----~----~----~------~----~------~--~---
