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https://issues.apache.org/jira/browse/BEAM-3346?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jean-Baptiste Onofré reassigned BEAM-3346:
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Assignee: Jean-Baptiste Onofré (was: Reuven Lax)
> Add projections to MongoDb IO
> -----------------------------
>
> Key: BEAM-3346
> URL: https://issues.apache.org/jira/browse/BEAM-3346
> Project: Beam
> Issue Type: New Feature
> Components: sdk-java-extensions
> Affects Versions: 2.3.0
> Reporter: Michael Kosten
> Assignee: Jean-Baptiste Onofré
> Labels: I/O, Java, MongoDB
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> The db.collection.find operation for MongoDb allows for the filter parameter,
> but not for the projection parameter. This would be extremely helpful for
> retrieving only a portion of fat documents. Looking over the current java
> code for MongoDbIO, this looks pretty straightforward.
> I think the best approach would be to add a String withProjection method to
> the builder, similar to the withFilter method, then parse this to Bson and
> then append it to the find method with .projection(fields(projectionBson)).
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