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Posted to issues@flink.apache.org by "Dawid Wysakowicz (Jira)" <ji...@apache.org> on 2026/02/12 09:59:00 UTC

[jira] [Created] (FLINK-39078) Disallow ON CONFLICT for non upsert sinks

Dawid Wysakowicz created FLINK-39078:
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             Summary: Disallow ON CONFLICT for non upsert sinks
                 Key: FLINK-39078
                 URL: https://issues.apache.org/jira/browse/FLINK-39078
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / API
            Reporter: Dawid Wysakowicz
            Assignee: Dawid Wysakowicz
             Fix For: 2.3.0


ON CONFLICT clause should be allowed only for upsert sinks. In other cases it may be silently ignored which may cause confusion, especially in case where the sink is append only with primary key.



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