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https://issues.apache.org/jira/browse/PHOENIX-6?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13898031#comment-13898031
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James Taylor commented on PHOENIX-6:
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Let's start out not having these options. We can add them later once the basic
functionality is in. Note that we'd need to disallow any columns in the primary
key constraint to be updated though.
> Support on duplicate key ignore construct
> -----------------------------------------
>
> Key: PHOENIX-6
> URL: https://issues.apache.org/jira/browse/PHOENIX-6
> Project: Phoenix
> Issue Type: New Feature
> Reporter: James Taylor
> Assignee: Haitao Yao
>
> To support inserting a new row only if it doesn't already exist, we should
> support the "on duplicate key ignore" construct (or it's SQL standard
> equivalent) for UPSERT.
> See this discussion for more detail:
> https://groups.google.com/d/msg/phoenix-hbase-user/Bof-TLrbTGg/68bnc8ZcWe0J
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