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https://issues.apache.org/jira/browse/BEAM-6579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16762034#comment-16762034
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Kenneth Knowles commented on BEAM-6579:
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Does this need to be cherrypicked to 2.7.1? If so, please clone the Jira, don't
reopen. That will help our release notes.
> BigQueryIO improperly handles triggering when temp tables are used
> -------------------------------------------------------------------
>
> Key: BEAM-6579
> URL: https://issues.apache.org/jira/browse/BEAM-6579
> Project: Beam
> Issue Type: Bug
> Components: io-java-gcp
> Affects Versions: 2.9.0
> Reporter: Reuven Lax
> Assignee: Reuven Lax
> Priority: Major
> Fix For: 2.10.0
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In WriteTables.java, the create disposition is changed to CREATE_NEVER for
> triggers after the first. This logic is correct when writing directly to the
> destination table - the table is created on the first write, and does not
> need to be recreated. However WriteTables is also used when writing to
> temporary tables, and the logic is incorrect in that case as a new table is
> created on every trigger.
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