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Posted to dev@drill.apache.org by "Paul Rogers (JIRA)" <ji...@apache.org> on 2018/01/11 00:00:14 UTC

[jira] [Created] (DRILL-6080) Sort incorrectly limits batch size to 65535 records rather than 65536

Paul Rogers created DRILL-6080:
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             Summary: Sort incorrectly limits batch size to 65535 records rather than 65536
                 Key: DRILL-6080
                 URL: https://issues.apache.org/jira/browse/DRILL-6080
             Project: Apache Drill
          Issue Type: Bug
    Affects Versions: 1.12.0
            Reporter: Paul Rogers
            Assignee: Paul Rogers
            Priority: Minor
             Fix For: 1.13.0


Drill places an upper limit on the number of rows in a batch of 64K. That is 65,536 decimal. When we index records, the indexes run from 0 to 64K-1 or 0 to 65,535.

The sort code incorrectly uses {{Character.MAX_VALUE}} as the maximum row count. So, if an incoming batch uses the full 64K size, sort ends up splitting batches unnecessarily.

The fix is to instead use the correct constant `ValueVector.MAX_ROW_COUNT`.



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