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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-2714) Correct byte estimate in BaseResultIterators and expose as interface
Date Thu, 25 Feb 2016 21:18:18 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-2714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15167893#comment-15167893
] 

James Taylor commented on PHOENIX-2714:
---------------------------------------

The ParallelScanGrouper is really an edge case - it's just a way for the MR integration to
override the default behavior. The ParallelScanGrouper could be passed through the query plan
constructor as well.

> Correct byte estimate in BaseResultIterators and expose as interface
> --------------------------------------------------------------------
>
>                 Key: PHOENIX-2714
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-2714
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.7.0
>            Reporter: Maryann Xue
>            Assignee: Maryann Xue
>              Labels: statistics
>             Fix For: 4.8.0
>
>         Attachments: PHOENIX-2714.patch
>
>
> The bytes are accumulated even if the range intersect is empty (produces a null scan).
> {code}
>                 while (guideIndex < gpsSize && (currentGuidePost.compareTo(endKey)
<= 0 || endKey.length == 0)) {
>                     Scan newScan = scanRanges.intersectScan(scan, currentKeyBytes, currentGuidePostBytes,
keyOffset,
>                             false);
>                     estimatedRows += gps.getRowCounts().get(guideIndex);
>                     estimatedSize += gps.getByteCounts().get(guideIndex);
>                     scans = addNewScan(parallelScans, scans, newScan, currentGuidePostBytes,
false, regionLocation);
>                     currentKeyBytes = currentGuidePost.copyBytes();
>                     currentGuidePost = PrefixByteCodec.decode(decoder, input);
>                     currentGuidePostBytes = currentGuidePost.copyBytes();
>                     guideIndex++;
>                 }
> {code}



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