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https://issues.apache.org/jira/browse/PHOENIX-2777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15198570#comment-15198570
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James Taylor commented on PHOENIX-2777:
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There is no way currently (for the same reason as PHOENIX-2422), but we can
keep this JIRA open as a separate enhancement request (though it's likely that
both this one and PHOENIX-2422 would be addressed at the same time).
> UPSERT an empty array by sql
> ----------------------------
>
> Key: PHOENIX-2777
> URL: https://issues.apache.org/jira/browse/PHOENIX-2777
> Project: Phoenix
> Issue Type: New Feature
> Reporter: Powpow Shen
>
> ARRAY type field can be inserted by *ARRAY['blah']* which has *ARRAY_LENGTH*
> 1, and it can also accept *NULL*. But it would be great if it can also
> accept *ARRAY[]*, so *ARRAY_LENGTH* can be 0.
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