Josh Forman-Gornall created BEAM-1908:
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Summary: Allow setting CREATE_NEVER when using a tablespec in
BigQueryIO
Key: BEAM-1908
URL: https://issues.apache.org/jira/browse/BEAM-1908
Project: Beam
Issue Type: Improvement
Components: sdk-java-extensions
Affects Versions: 0.6.0
Reporter: Josh Forman-Gornall
Assignee: Davor Bonaci
Priority: Trivial
Currently, the BigQueryIO.Write transform doesn't allow
CreateDisposition.CREATE_NEVER to be set when using a tablespec to determine
the BigQuery table name dynamically at runtime.
This check was originally put in because it was assumed that BigQueryIO would
need to create a new table every time the tablespec returns a table name that
hasn't been seen before. Since then a new BigQuery feature was released which
enables date partitioning within a single table, and is now the preferred way
to shard data by date (instead of having a table per date). It should therefore
be possible to use tablespec to write to a specific partition e.g.
`my-project:dataset.my_table$20170407`, while setting
CreateDisposition.CREATE_NEVER since we never need to create a new table.
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