[jira] [Assigned] (SPARK-20463) Add support for IS [NOT] DISTINCT FROM to SPARK SQL

["Xiao Li (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-20463?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiao Li reassigned SPARK-20463:
-------------------------------

    Assignee: Michael Styles

> Add support for IS [NOT] DISTINCT FROM to SPARK SQL
> ---------------------------------------------------
>
>                 Key: SPARK-20463
>                 URL: https://issues.apache.org/jira/browse/SPARK-20463
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.1.0
>            Reporter: Michael Styles
>            Assignee: Michael Styles
>             Fix For: 2.3.0
>
>
> Add support for the SQL standard distinct predicate to SPARK SQL.
> {noformat}
> <expression> IS [NOT] DISTINCT FROM <expression>
> {noformat}
> {noformat}
> data = [(10, 20), (30, 30), (40, None), (None, None)]
> df = sc.parallelize(data).toDF(["c1", "c2"])
> df.createTempView("df")
> spark.sql("select c1, c2 from df where c1 is not distinct from c2").collect()
> [Row(c1=30, c2=30), Row(c1=None, c2=None)]
> {noformat}



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