Thanks for the explanation.  I was trying to avoid any
__search_text_index indexes as you suggest, to get around the 1 per
each number of keywords, so I didn't use any equality or sorts.  It
usually works fine, and is again today as far as I can tell.  It
must've been been something with the particular search query being
done.  I've tried to set it up to capture/log errors better.

Hopefully the full text solution is on its way soon.

On Jan 9, 10:30 am, ryan <[email protected]> wrote:
> hi guys! "merge join" queries like these, ie queries that have equals
> filters on multiple properties but no inequality filters or sort
> orders, *usually* don't require an index. that's described 
> inhttp://code.google.com/appengine/docs/datastore/queriesandindexes.htm...
> .
>
> however, in cases with unusually shaped data, these queries can
> sometimes require an index. these cases are exceedingly rare, but
> they're somewhat more common with apphosting.ext.search.
>
> also, you need an index for each number of keywords that you expect in
> a query. for example, if you support three-word search queries, you
> need this index:
>
> - kind: Post
>   properties:
>   - name: __searchable_text_index
>   - name: __searchable_text_index
>   - name: __searchable_text_index
>   - name: approved
>
> more in the ext.search 
> docstring,http://code.google.com/p/googleappengine/source/browse/trunk/google/a...
> . also, unfortunately, these kinds of indices are likely to explode,
> as described 
> inhttp://code.google.com/appengine/docs/datastore/queriesandindexes.htm...
> .
>
> the upshot of all of this, as we've mentioned before, is that
> appengine.ext.search is a hack. it's not scalable, mature, or anywhere
> near industrial strength, which is why it's not officially supported
> or documented. we're well aware that it's not good enough, and we
> dearly hope to offer a real full text search solution in the future. i
> don't have any details or timeline, though.
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