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https://issues.apache.org/jira/browse/PHOENIX-2018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14572097#comment-14572097
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Shuxiong Ye commented on PHOENIX-2018:
--------------------------------------
{code:java}
+ @Override
+ public OrderPreserving preservesOrder() {
+ return OrderPreserving.YES;
+ }
{code}
SqrtFunction is OrderPreserving.YES, so its result should be the same as input.
That's why I specialize the getSortOrder() method and coerce the result of
Math.sqrt here.
> Implement math build-in function SQRT
> -------------------------------------
>
> Key: PHOENIX-2018
> URL: https://issues.apache.org/jira/browse/PHOENIX-2018
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: Shuxiong Ye
> Assignee: Shuxiong Ye
> Fix For: 5.0.0, 4.5.0, 4.4.1
>
> Attachments:
> 0001-PHOENIX-2018-Implement-math-build-in-function-SQRT_v3.patch
>
>
> # SQRT means square root.
> # Return type will be PDouble
> # OrderPreserving
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