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https://issues.apache.org/jira/browse/BEAM-8272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16936099#comment-16936099
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Robert Burke commented on BEAM-8272:
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Note that the implementation will necessarily be different in the Go SDK. The
SDK doesn't yet support the State and Timers API, which both the Java and
Python implementations use.
> GroupIntoBatches transform for Go SDK
> -------------------------------------
>
> Key: BEAM-8272
> URL: https://issues.apache.org/jira/browse/BEAM-8272
> Project: Beam
> Issue Type: New Feature
> Components: sdk-go
> Reporter: John Patoch
> Priority: Major
>
> Add a PTransform that batches inputs to a desired batch size. Batches will
> contain only elements of a single key.
> It should offer the same API as its Java counterpart:
> [https://github.com/apache/beam/blob/11a977b8b26eff2274d706541127c19dc93131a2/sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/GroupIntoBatches.java]
>
> And Python counterpart:
> https://github.com/apache/beam/blob/c445fdfdfab4a191aa780210564199f2873f85d8/sdks/python/apache_beam/transforms/util.py#L684
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