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https://issues.apache.org/jira/browse/BEAM-3171?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xu Mingmin closed BEAM-3171.
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Resolution: Fixed
Fix Version/s: 2.3.0
> convert a join into lookup
> --------------------------
>
> Key: BEAM-3171
> URL: https://issues.apache.org/jira/browse/BEAM-3171
> Project: Beam
> Issue Type: New Feature
> Components: dsl-sql
> Reporter: Xu Mingmin
> Assignee: Xu Mingmin
> Priority: Major
> Labels: experimental
> Fix For: 2.3.0
>
>
> We use BeamSQL to run streaming jobs mostly, and add a join_as_lookup
> improvement(internal branch) to cover the streaming-to-batch case(similar as
> [1]). I could submit a PR as experimental if people are interested.
> The rough solution is, if one source of join node implements
> {{BeamSeekableTable}} and the other is not, then the join node is converted
> to a fact-lookup operation.
> Ref:
> [1]
> https://docs.google.com/document/d/1B-XnUwXh64lbswRieckU0BxtygSV58hysqZbpZmk03A/edit?usp=sharing
>
> [~xumingming] [~takidau] for any comments
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