[jira] [Assigned] (SPARK-22257) Reserve all non-deterministic expressions in ExpressionSet.

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-22257?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-22257:
------------------------------------

    Assignee: Apache Spark

> Reserve all non-deterministic expressions in ExpressionSet.
> -----------------------------------------------------------
>
>                 Key: SPARK-22257
>                 URL: https://issues.apache.org/jira/browse/SPARK-22257
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Gengliang Wang
>            Assignee: Apache Spark
>            Priority: Critical
>
> For non-deterministic expressions, they should be considered as not contained in the [[ExpressionSet]].
>  
> This is consistent with how we define `semanticEquals` between two expressions.
> Otherwise, combining expressions will remove non-deterministic expressions which should be reserved.
> E.g
> Combine filters of 
> ```
>       testRelation.where(Rand(0) > 0.1).where(Rand(0) > 0.1)
> ```
> should result in
> ```
>       testRelation.where(Rand(0) > 0.1 && Rand(0) > 0.1)
> ```



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