I changed all List<Double> properties in my persistent class to double[] arrays and made these properties unindexed, because I never need to query on these. To make attributes unindexed I used the following annotation:
@Extension(vendorName="datanucleus", key="gae.unindexed", value="true")//unindexed property private double[] listProperty; That fixed the problem and furthermore made the access faster... Marcus On 14 Dez., 20:03, "Ikai Lan (Google)" <[email protected]> wrote: > It's not an issue with the data type, it's an issue with queries that look > into multiple list properties: > > http://code.google.com/appengine/docs/java/datastore/queriesandindexe... > > What you have is an example of an exploding index. Rather than filtering in > query, is there any way you can filter for a subset of results using > datastore operations, then filter in memory? > > -- > Ikai Lan > Developer Programs Engineer, Google App Engine > Blogger:http://googleappengine.blogspot.com > Reddit:http://www.reddit.com/r/appengine > Twitter:http://twitter.com/app_engine > > On Tue, Dec 14, 2010 at 3:35 AM, androidDeveloper <[email protected] > > > wrote: > > I got an "IllegalArgumentException: Too many indexed properties for > > entity" Exception when saving an entity that looks like this: > > ... > > �...@persistent > > �...@element(dependent = "true") > > �...@order(extensions = @Extension(vendorName="datanucleus", > > key="list- > > ordering", value="aDate asc")) > > private List<ClassA> classAList; //ClassA only contains basic > > properties like String and double > > > �...@persistent > > private double[] list1; > > �...@persistent > > private double[] list2; > > �...@persistent > > private double[] list3; > > > When I save an object, that has no more than 10 objects in classAList > > and 3600 elements in each of the double[] Arrays list1-3 the error > > above occurs in datastore. > > I know that there exists a cap for indexed properties per entity of > > max 5000. But I though this would only affect list porperties? > > My question is, why are double arrays indexed? I thougt only List > > Properties would be indexed? > > Is double[] handled like List<Double> in app engines datastore? > > > -- > > 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]<google-appengine-java%[email protected]> > > . > > For more options, visit this group at > >http://groups.google.com/group/google-appengine-java?hl=en. > > -- 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.
