http://www.youtube.com/watch?v=AgaL6NGpkB8 Enjoy !
On 15/09/10 12:55, "Ice13ill" <[email protected]> wrote: > What speech/presentation are you refering ? > > On Sep 15, 11:44 am, Crll Vnc <[email protected]> wrote: >> Hi Big Brains, >> >> I carefully watched the Brett¹s speech about large scale apps and how to use >> the list property. I encourage everyone to watch it. >> >> My need : to query on BOTH a single property AND a list property. >> This will create a custom index over ONE single property and ONE list >> property. >> >> My question : I need to know from your experience if this would lead to >> query or index performance issues, knowing that we intend to manage a VERY >> large number of those small entities. >> >> Following is a sample example of my model (where I removed all JDO >> annotations for clarity) : >> >> Class HelpMeBigBrains { >> private Key key; // primary key of the object >> private Key objectAkey; // unowned one-to-one >> private List<Key> objectBkeys; // unowned one-to-many >> >> } >> >> My JDO query would look like this : >> >> Query query = pm.newQuery("SELECT key FROM " + >> HelpMeBigBrains.class.getName()); >> query.setFilter(³objectAkey == aKey²); >> query.setFilter(³objectBkeys.contains(b1Key)²); >> query.setFilter(³objectBkeys.contains(b2Key)²); >> query.declareParameters(³com.google.appengine.api.datastore.Key aKey, b1Key, >> b2Key²); >> List<Key> results = (List<Key>) query.execute(keyA, keyB1, keyB2); >> >> Thank you in advance for your answer(s). >> >> Kind regards, >> Cyrille -- 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.
