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In Cassandra, as far as I know, for SELECT filtered by non-key attributes, you only have three options: (1) Application side filtering. That is, if you get your results from a CQL SELECT, use your application to filter the results. For all but the smallest data sets, this is ill-advised. (2) Bite the bullet, and create those secondary indices. (3) ...


Try this link https://cloud.google.com/appengine/docs/php/storage . This should get you started on the use and main concepts. FYI joins are not applicable to the datastore but if you model out your data correctly you should have no problem.

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