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javagoogle-app-enginejdogoogle-cloud-datastoredatanucleus

AppEngine - JDO query !contains

I'm using Google App Engine with JDO. Trying to get entities where a collection of strings doesn't contain a specific string:

!viewers.contains('aaa')
"App Engine datastore does not support operator NOT"

Any workarounds?

Solution

  • GAE queries are always performed on indexes. However, the does not include string query needs a table scan. Such query is not possible on GAE.