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https://issues.apache.org/jira/browse/PHOENIX-1875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533808#comment-14533808
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Dumindu Buddhika commented on PHOENIX-1875:
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So when there is a group of nulls at the beginning, if the prepended element is 
also null we need to keep the offsets of those nulls at the beginning as 0 ( 
without adding offsetshift ). For that we need to separate cases, right? 

> implement ARRAY_PREPEND built in function
> -----------------------------------------
>
>                 Key: PHOENIX-1875
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-1875
>             Project: Phoenix
>          Issue Type: Sub-task
>            Reporter: Dumindu Buddhika
>            Assignee: Dumindu Buddhika
>         Attachments: PHOENIX-1875-v2.patch, PHOENIX-1875-v3.patch, 
> PHOENIX-1875-v4.patch
>
>
> ARRAY_PREPEND(1, ARRAY[2, 3]) = ARRAY[1, 2, 3]
> ARRAY_PREPEND("a", ARRAY["b", "c"]) = ARRAY["a", "b", "c"]
> ARRAY_PREPEND(null, ARRAY["b", "c"]) = ARRAY[null, "b", "c"]



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