No, there is no real concept of structure. The closest thing to structure would be the indexes on the values of the data stored. You can read more about this here:
http://code.google.com/appengine/articles/storage_breakdown.html On Sat, Feb 13, 2010 at 11:16 PM, kang <areyouloo...@gmail.com> wrote: > OK. Thanks for you reply. So it's hard to change the datastore structure in > GAE? > > > On Sat, Feb 13, 2010 at 1:50 AM, Ikai L (Google) <ika...@google.com>wrote: > >> Unfortunately, we don't have mass deletion capability yet. The datastore >> isn't like a relational database where we can just drop a table. Entities >> are schemaless and are indexed, so a mass deletion would need to traverse >> the EntitiesByKind index: >> >> >> http://code.google.com/appengine/articles/storage_breakdown.html#anc-entitiestable >> >> >> <http://code.google.com/appengine/articles/storage_breakdown.html#anc-entitiestable>At >> some point, we may offer a delete better tools for managing a mass delete, >> though it would likely be implemented on top of our Task Queue >> infrastructure since it wouldn't be a trivial operation. Can you add/find >> the issue in our issues tracker and star it? >> >> http://code.google.com/p/googleappengine/issues >> >> >> On Fri, Feb 12, 2010 at 6:49 AM, lookon <areyouloo...@gmail.com> wrote: >> >>> My total datastore has been reached 77% and I'd like to clear some old >>> data. How can I remove a whole Model in GAE? And how can I delete huge >>> amount of data? >>> >>> I'm now using the task queue to delete. Wish someone can give me some >>> better way. 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-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. >>> >>> >> >> >> -- >> Ikai Lan >> Developer Programs Engineer, Google App Engine >> http://googleappengine.blogspot.com | http://twitter.com/app_engine >> >> -- >> 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. >> > > > > -- > Stay hungry,Stay foolish. > > -- > 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. > -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com | http://twitter.com/app_engine -- 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.
