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Posted to issues@spark.apache.org by "Zhenhua Wang (JIRA)" <ji...@apache.org> on 2016/11/23 08:27:58 UTC

[jira] [Created] (SPARK-18559) Also restrict the lower bound of relativeSD in HLL++

Zhenhua Wang created SPARK-18559:
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             Summary: Also restrict the lower bound of relativeSD in HLL++
                 Key: SPARK-18559
                 URL: https://issues.apache.org/jira/browse/SPARK-18559
             Project: Spark
          Issue Type: Bug
          Components: SQL
            Reporter: Zhenhua Wang


In HyperLogLogPlusPlus, THRESHOLDS, RAW_ESTIMATE_DATA and BIAS_DATA all have the same length 15, and we probe these arrays by p-4, so we need to guarantee 0 <= p - 4 <= 14. Otherwise it will cause ArrayIndexOutOfBoundsException.



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