I've already found the answer by myself. The answer is here: http://www.google.com/intl/uk-UA/events/io/2009/sessions/BuildingScalableComplexApps.html. Just few words. For queries with multiple equality filters GAE uses merge-join. GAE scans single indexes for every equality filter in the query and merge results. For more details you can see very helpful video by the link above.
On 19 Грд, 17:53, "ss.require" <[email protected]> wrote: > Documentation says: > > App Engine provides automatic indexes for the following forms of > queries: queries using only equality and ancestor filters > > For implementation of this feature GAE uses single-property indexes or > composite indexex or something else? If composite indexexes then how > many indexes are used (for example: all possible permutations for > properties)? -- 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.
