[jira] [Created] (BEAM-1834) Bigquery Write validation doesn't work well with ValueInSingleWindow

["Kevin Peterson (JIRA)" <ji...@apache.org>]

Kevin Peterson created BEAM-1834:
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             Summary: Bigquery Write validation doesn't work well with ValueInSingleWindow
                 Key: BEAM-1834
                 URL: https://issues.apache.org/jira/browse/BEAM-1834
             Project: Beam
          Issue Type: Bug
          Components: sdk-java-gcp
            Reporter: Kevin Peterson
            Assignee: Daniel Halperin


I am using the new {{Write<T> to(SerializableFunction<ValueInSingleWindow<T>, String> tableSpecFunction)}} function to write data to different Bigquery tables depending on the values. I'm my case, the values can have a different schema (it starts as an {{Any}} encoded protobuf, which I parse and expand to a {{TableRow}} object).

Since the tables have different schemas, the existing implementation of {{withSchema}} doesn't work.

Some options:
# Allow {{CreateDisposition.CREATE_NEVER}} in this situation. Failed inserts from a missing table just fail (and eventually pass through via BEAM-190).
# Add a new {{withSchema(SerializableFunction<ValueInSingleWindow<T>, TableSchema>}} function.

I think eventually both of the above should be allowable configurations, but just one will unblock my current error. Happy to implement, given some guidance on design preferences.



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