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Posted to issues@spark.apache.org by "Tim Armstrong (Jira)" <ji...@apache.org> on 2021/07/20 19:24:00 UTC

[jira] [Created] (SPARK-36229) conv() inconsistently handles invalid strings with > 64 invalid characters

Tim Armstrong created SPARK-36229:
-------------------------------------

             Summary: conv() inconsistently handles invalid strings with > 64 invalid characters
                 Key: SPARK-36229
                 URL: https://issues.apache.org/jira/browse/SPARK-36229
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 3.1.2
         Environment: SPARK-33428 fixed ArrayIndexOutofBoundsException but introduced a new inconsistency in behaviour where the returned value is different above the 64 char threshold.

 
{noformat}
scala> spark.sql("select conv(repeat('?', 64), 10, 16)").show
+---------------------------+
|conv(repeat(?, 64), 10, 16)|
+---------------------------+
|                          0|
+---------------------------+




scala> spark.sql("select conv(repeat('?', 65), 10, 16)").show
+---------------------------+
|conv(repeat(?, 65), 10, 16)|
+---------------------------+
|           FFFFFFFFFFFFFFFF|
+---------------------------+




scala> spark.sql("select conv(repeat('?', 65), 10, -16)").show
+----------------------------+
|conv(repeat(?, 65), 10, -16)|
+----------------------------+
|                          -1|
+----------------------------+




scala> spark.sql("select conv(repeat('?', 64), 10, -16)").show
+----------------------------+
|conv(repeat(?, 64), 10, -16)|
+----------------------------+
|                           0|
+----------------------------+{noformat}
            Reporter: Tim Armstrong






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