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Posted to issues@spark.apache.org by "Yuanjian Li (Jira)" <ji...@apache.org> on 2020/06/28 04:29:00 UTC

[jira] [Created] (SPARK-32115) Incorrect results for SUBSTRING when overflow

Yuanjian Li created SPARK-32115:
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             Summary: Incorrect results for SUBSTRING when overflow
                 Key: SPARK-32115
                 URL: https://issues.apache.org/jira/browse/SPARK-32115
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Yuanjian Li


SQL query SELECT SUBSTRING("abc", -1207959552, -1207959552) in Spark incorrectly returns "abc" against expected output of "".
This is a result of integer overflow in addition [https://github.com/apache/spark/blob/8c44d744631516a5cdaf63406e69a9dd11e5b878/common/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java#L345]



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