[GitHub] [beam] ahmedabu98 commented on pull request #24700: [BigQueryIO] Don't update schema of destination table when no schema is provided

[GitBox]

ahmedabu98 commented on PR #24700:
URL: https://github.com/apache/beam/pull/24700#issuecomment-1365278188

   @Abacn 
   Without this PR, this wouldn't work with large writes (ie. writing without 
specifying a schema):
   
   ```
   BigQueryIO
      .writeTableRows()
      .to(OutputTable)
      .withCreateDisposition(CreateDisposition.CREATE_NEVER))
   ```
   
   As it is now, the write would get stuck in `UpdateSchemaDestination` trying 
to update final destination table schema with a null schema.


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