[
https://issues.apache.org/jira/browse/SPARK-11469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14988174#comment-14988174
]
Yin Huai commented on SPARK-11469:
----------------------------------
Updated the title and description.
> Initial implementation of allowing users to define UDFs that will not be
> evaluated more than once
> -------------------------------------------------------------------------------------------------
>
> Key: SPARK-11469
> URL: https://issues.apache.org/jira/browse/SPARK-11469
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Yin Huai
> Assignee: Yin Huai
> Fix For: 1.6.0
>
>
> Right now, we have a projection collapsing optimization rule, that will
> collapse multiple project operators by evaluating an expression multiple
> times. However, there are cases that we do not want to do it (e.g. for rand).
> This work is to let users define such UDF functions.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
