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https://issues.apache.org/jira/browse/BEAM-7665?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tianyang Hu resolved BEAM-7665.
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Fix Version/s: 2.14.0
Resolution: Fixed
> Support TypeDefinition options in beam.Combine()
> ------------------------------------------------
>
> Key: BEAM-7665
> URL: https://issues.apache.org/jira/browse/BEAM-7665
> Project: Beam
> Issue Type: Improvement
> Components: sdk-go
> Reporter: Tianyang Hu
> Assignee: Tianyang Hu
> Priority: Major
> Fix For: 2.14.0
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> Today, CombineFn's output type must be either concrete or a generic type that
> can be inferred from the input type. This doesn't work if the input type is
> struct\{U, V\} while the output type is V (where U and V are generic types).
> Similar to ParDo, we could add TypeDefinition options support to Combine.
> This will bind generic types in the CombineFn to the specified concrete types
> at pipeline construction time.
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