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Updating records can take a little more work in druid. For examples of approaches, take a look at https://imply.io/developer/articles/upserts-and-data-deduplication-with-druid/ and https://blog.hellmar-becker.de/2023/03/07/selective-bulk-upserts-in-apache-druid/. Overwriting (with appendToExisting set to false) can work if you're replacing an entire time chunk - it won't update individual rows.

Hi Ben, thanks for the response. Seems like Druid is not a good fit for our requirement due to hight count of upsert commands