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Posted to issues@spark.apache.org by "Yin Huai (JIRA)" <ji...@apache.org> on 2015/08/06 19:44:09 UTC

[jira] [Assigned] (SPARK-9691) PySpark SQL rand function treats seed 0 as no seed

     [ https://issues.apache.org/jira/browse/SPARK-9691?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yin Huai reassigned SPARK-9691:
-------------------------------

    Assignee: Yin Huai

> PySpark SQL rand function treats seed 0 as no seed
> --------------------------------------------------
>
>                 Key: SPARK-9691
>                 URL: https://issues.apache.org/jira/browse/SPARK-9691
>             Project: Spark
>          Issue Type: Bug
>          Components: PySpark, SQL
>    Affects Versions: 1.4.0, 1.4.1, 1.4.2, 1.5.0
>            Reporter: Joseph K. Bradley
>            Assignee: Yin Huai
>
> In PySpark SQL's rand() function, it tests for a seed in a way such that seed 0 is treated as no seed, leading to non-deterministic results when a user would expect deterministic results.
> See: [https://github.com/apache/spark/blob/98e69467d4fda2c26a951409b5b7c6f1e9345ce4/python/pyspark/sql/functions.py#L271]



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