At Google I/O 2010 there will be a session Next Gen Queries which will be partly on work done to get the full text on App Engine to be more usable. They are not telling what exactly will be proposed. One additional thing mentioned is filtering and sorting for zigzag queries.
I have to inform people not aware of it - exact search on PrzepisyMM.info is using this kind of queries and currently Datastore does not really allow to do sorting in this case because of exploding indexes. If they add sorting and filtering for zigzag, it will not solve all full text search problems but will be much, much more usable (no more zigzag queries sorting in memory which of course doesn't scale for results above 200, not to mention the 1000 limit).
16 January 2010
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