For example, if I have: "List A" and a "String B" What is the difference, in JDO (AppEngine), between the following two conditions in a query: B == A; and A.contains(B);?
Also, does the query in Slides 23-25 of http://dl.google.com/io/2009/pres/W_0415_Building_Scalable_Complex_App_Engines.pdf work efficiently in AppEngine (JDO) for more than 30 receivers? How so, especially since I read in AppEngine documentation that each contains() query can have a maximum of 30 items in the list. Do I not use a contains() query to imitate the above slides (written in Python)? If not, then how can I achieve the same results in JDO? Finally, how does AppEngine limit the subqueries for a query like this: Key A = "bla bla"; Query query = pm.newQuery("select from Message" " where keys.contains(:A) "); ArrayList <Key> result = query.execute(A); where keys is a list property in the datastore. Any suggestions/comments are highly welcome. Thanks. -- You received this message because you are subscribed to the Google Groups "Google App Engine" 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?hl=en.
