You want the batch version of the get function, getObjectsById<http://db.apache.org/jdo/api20/apidocs/javax/jdo/PersistenceManager.html#getObjectsById(java.util.Collection)>, which shouldn't involve multiple round-trips to the database.
On Mon, Jul 19, 2010 at 1:09 PM, Robert Lancer <robert.lan...@gmail.com>wrote: > App Engine status has bench marks for this, > http://code.google.com/status/appengine/ > > But I can tell you for your situation here the get would be ideal > because you would actually be using 4 queries because thats what the > IN clause does behind the scenes, and thats the way your query would > work with the id == 'id1' || id == 'id2' ... > > > On Jul 19, 12:40 pm, Robert Kluin <robert.kl...@gmail.com> wrote: > > Have you thought about benchmarking this? > > > > > > > > On Mon, Jul 19, 2010 at 10:51 AM, coltsith <conla...@gmail.com> wrote: > > > Lets say I want to retrieve 4 objects. What would be faster: > > > > > 1. for (int i = 0; i < 4; i++) { > > > > > persistenceManager.getObjectById(object1) > > > > > } > > > > > or > > > > > 2. Query = (select * from objects where id == 'id1' || id == 'id2' > > > || id == 'id3' || id == 'id4') > > > > > 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 google-appengine@googlegroups.com > . > > > To unsubscribe from this group, send email to > google-appengine+unsubscr...@googlegroups.com<google-appengine%2bunsubscr...@googlegroups.com> > . > > > For more options, visit this group athttp:// > groups.google.com/group/google-appengine?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to google-appeng...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine+unsubscr...@googlegroups.com<google-appengine%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
