sshcherbakov commented on issue #3951: NIFI-6934: Add support for Postgres flavour of UPSERT action URL: https://github.com/apache/nifi/pull/3951#issuecomment-572661000 UPSERT as such is supported not only by Postgres, but unfortunately there is no standard SQL syntax indeed (MySQL syntax is different). Good idea about making implementation selectable (that's what generator means here I guess) and throwing UnsupportedOperationException. It should also be possible to auto-detect the target SQL database flavour to select implementation automatically. That's some more work though. Will try to wrap something up.
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