tomlynchRNA opened a new issue, #25225:
URL: https://github.com/apache/beam/issues/25225

   ### What would you like to happen?
   
   Hello,
   
   I am running an Apache Beam pipeline and streaming inserts into Google 
BigQuery with the Python SDK.
   
   I am facing an issue where because Beam only creates tables once before 
storing the name a list called `_KNOWN_TABLES`, if the table is deleted while 
the pipeline is running after Beam having already created it, further inserts 
will error out with a 404 and not attempt to re-create it.
   
   You can see here where the `_create_table_if_needed` method returns early if 
the table is already in `_KNOWN_TABLES`:
   
https://github.com/apache/beam/blob/master/sdks/python/apache_beam/io/gcp/bigquery.py#L1463
   
   I have the pipeline create disposition set to the default CREATE_IF_NEEDED, 
therefore I expect that if the table does not exist (and **is needed**) to 
stream inserts, that it will be created.
   
   I propose that a mechanism be implemented allowing this behaviour, and would 
be willing to make the changes & open a pull request.
   
   Looking forward to your thoughts,
   Tom
   
   ### Issue Priority
   
   Priority: 2 (default / most feature requests should be filed as P2)
   
   ### Issue Components
   
   - [X] Component: Python SDK
   - [ ] Component: Java SDK
   - [ ] Component: Go SDK
   - [ ] Component: Typescript SDK
   - [ ] Component: IO connector
   - [ ] Component: Beam examples
   - [ ] Component: Beam playground
   - [ ] Component: Beam katas
   - [ ] Component: Website
   - [ ] Component: Spark Runner
   - [ ] Component: Flink Runner
   - [ ] Component: Samza Runner
   - [ ] Component: Twister2 Runner
   - [ ] Component: Hazelcast Jet Runner
   - [ ] Component: Google Cloud Dataflow Runner


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