Ilnar Taichinov created BEAM-2819:
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Summary: Key only reads from Google Datastore
Key: BEAM-2819
URL: https://issues.apache.org/jira/browse/BEAM-2819
Project: Beam
Issue Type: Wish
Components: sdk-java-gcp
Reporter: Ilnar Taichinov
Assignee: Chamikara Jayalath
Currently there is no functionality allowing to read only keys from the Google
Datastore through the Datastore IO. In some cases users don't need to read the
whole entity, e.g. to filter by certain values in ancestry. This seems to be an
important feature as the entity reads are expensive and thus the native
Datastore client/API allow to run Key Only queries.
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