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Posted to issues@spark.apache.org by "Anton Okolnychyi (JIRA)" <ji...@apache.org> on 2019/01/23 13:49:00 UTC

[jira] [Created] (SPARK-26706) Fix Cast$mayTruncate for bytes

Anton Okolnychyi created SPARK-26706:
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             Summary: Fix Cast$mayTruncate for bytes
                 Key: SPARK-26706
                 URL: https://issues.apache.org/jira/browse/SPARK-26706
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.3.3, 3.0.0
            Reporter: Anton Okolnychyi


The logic in {{Cast$mayTruncate}} is broken for bytes.

Right now, {{mayTruncate(ByteType, LongType)}} returns {{false}} while {{mayTruncate(ShortType, LongType)}} returns {{true}}. Consequently, {{spark.range(1, 3).as[Byte]}} and {{spark.range(1, 3).as[Short]}} will behave differently.

Potentially, this bug can silently corrupt someone's data.



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