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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7928) Scanning .META. with startRow and/or stopRow is not giving proper results
Date Thu, 28 Feb 2013 03:39:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13589139#comment-13589139
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Anoop Sam John commented on HBASE-7928:
---------------------------------------

What I thought was if it is byte[] operations alone it might look cleaner than conversions
(2 times). Not a must. :)  You can decide
May be our util Bytes class can add this kind of indexOf API also?  May be useful. We wanted
similar kind of byte index logic in our sec index code.
Will open a new JIRA? I can work on that.
                
> Scanning .META. with startRow and/or stopRow is not giving proper results
> -------------------------------------------------------------------------
>
>                 Key: HBASE-7928
>                 URL: https://issues.apache.org/jira/browse/HBASE-7928
>             Project: HBase
>          Issue Type: Bug
>          Components: Usability
>    Affects Versions: 0.94.5
>            Reporter: Jean-Marc Spaggiari
>            Assignee: ramkrishna.s.vasudevan
>         Attachments: HBASE-7928_0.94_1.patch, HBASE-7928_0.94_2.patch, HBASE-7928_0.94.patch,
HBASE-7928_trunk_1.patch, HBASE-7928_trunk.patch
>
>
> {code}
>     try {
>       HTable metaTable = new HTable(config, Bytes.toBytes(".META."));
>       Scan scan = new Scan();
>       scan.setStartRow(Bytes.toBytes("e"));
>       scan.setStopRow(Bytes.toBytes("z"));
>       ResultScanner scanner = metaTable.getScanner(scan);
>       Result[] results = scanner.next(100);
>       while (results.length > 0) {
>         for (Result result : results) {
>           System.out.println(Bytes.toString(result.getRow()));
>         }
>         results = scanner.next(100);
>       }
>       scanner.close();
>       metaTable.close();
>     } catch (Exception e) {
>       e.printStackTrace();
>     }
> {code}
> This code will not return any result even if there is 10 tables with names starting with
"d" to "w", including one table called "entry". If you comment the setStopRow you will get
results, but will still get rows starting with "d" even if setStartRow is set to "e".
> Same code using with a user table is working fine.
> Facing the same issue with the shell.
> scan '.META.' , {STARTROW => 'e', LIMIT => 10} is returning rows starting by "d".
> scan '.META.' , {STARTROW => 'e', STOPROW => 'v', LIMIT => 10} is not returning
anything.

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