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Posted to issues@spark.apache.org by "Dongjoon Hyun (JIRA)" <ji...@apache.org> on 2019/08/16 09:27:00 UTC
[jira] [Updated] (SPARK-18466) Missing withFilter method causes
errors when using for comprehensions in Scala 2.12
[ https://issues.apache.org/jira/browse/SPARK-18466?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dongjoon Hyun updated SPARK-18466:
----------------------------------
Issue Type: Improvement (was: Sub-task)
Parent: (was: SPARK-24417)
> 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: Improvement
> 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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