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From "Dongjoon Hyun (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-18466) Missing withFilter method causes errors when using for comprehensions in Scala 2.12
Date Wed, 07 Nov 2018 06:48:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-18466?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dongjoon Hyun updated SPARK-18466:
----------------------------------
    Affects Version/s:     (was: 2.3.0)
                           (was: 2.0.2)
                           (was: 2.0.1)
                           (was: 1.6.3)
                           (was: 1.6.2)
                           (was: 1.6.1)
                           (was: 1.5.2)
                           (was: 1.5.1)
                           (was: 1.6.0)
                           (was: 1.4.1)
                           (was: 1.5.0)
                           (was: 2.0.0)
                           (was: 1.4.0)

> Missing withFilter method causes errors when using for comprehensions in Scala 2.12
> -----------------------------------------------------------------------------------
>
>                 Key: SPARK-18466
>                 URL: https://issues.apache.org/jira/browse/SPARK-18466
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Spark Core
>    Affects Versions: 2.4.0
>            Reporter: Richard W. Eggert II
>            Priority: Minor
>              Labels: easyfix
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> The fact that the RDD class has a {{filter}} method but not a {{withFilter}} method results
in compiler warnings when using RDDs in {{for}} comprehensions. As of Scala 2.12, falling
back to use of {{filter}} is no longer supported, so {{for}} comprehensions that use filters
will no longer compile. Semantically, the only difference between {{withFilter}} and {{filter}}
is that {{withFilter}} is lazy, and since RDDs are lazy by nature, one can simply be aliased
to the other.



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