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https://issues.apache.org/jira/browse/SPARK-18491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15673599#comment-15673599
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Sean Owen commented on SPARK-18491:
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You should be able to use Date, and later the java.time classes once Java 8 can
be assumed, yes. That's basically what this is about, making sure those types
in case classes are supported as date/time types?
For now I don't think this is a Spark problem, while it can't use Java 8
classes. Even afterwards it wouldn't not support these types. It is up to your
code to not mutate these types, or at least, that's not specific to these
classes.
> Spark uses mutable classes for date/time types mapping
> ------------------------------------------------------
>
> Key: SPARK-18491
> URL: https://issues.apache.org/jira/browse/SPARK-18491
> Project: Spark
> Issue Type: Improvement
> Reporter: Damian Momot
> Priority: Minor
>
> TimestampType is mapped to java.sql.Timestamp
> DateType is mapped to java.sql.Date
> Those both java types are mutable and thus their usage is highly discourage,
> especially in distributed computing which uses lazy, functional approach
> Mapping to immutable joda times should be enough for now (until scala 2.12 +
> jdk8 java.time is available for spark)
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