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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6468) RowCounter may return incorrect result if column name is specified in command line
Date Tue, 31 Jul 2012 08:09:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13425604#comment-13425604

Anoop Sam John commented on HBASE-6468:

So when a row r1 contains KVs with qualifier a,b,c (for a give CF) and the qualifier in FirstKeyValueMatchingQualifiersFilter
are b,c
we will include all KVs for qualifier a and one KV(1st KV) for qualifier b/c in the Result
for row r1. Is this expected? I was thinking that this new Filter also will select only one
KV for a row. But the selection is from a subset of qualifiers not whole.
[KVs for qualifier a will come before b and c]
> RowCounter may return incorrect result if column name is specified in command line
> ----------------------------------------------------------------------------------
>                 Key: HBASE-6468
>                 URL: https://issues.apache.org/jira/browse/HBASE-6468
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.90.5
>            Reporter: Shrijeet Paliwal
>         Attachments: 0001-HBASE-6468-RowCounter-may-return-incorrect-result.patch, 0002-HBASE-6468-RowCounter-may-return-incorrect-result.patch
> The RowCounter use FirstKeyOnlyFilter regardless of whether or not the
> command line argument specified a column family (or family:qualifier).
> In case when no qualifier was specified as argument, the scan will
> give correct result. However in the other case the scan instance may
> have been set with columns other than the very first column in the
> row, causing scan to get nothing as the FirstKeyOnlyFilter removes
> everything else.
> https://issues.apache.org/jira/browse/HBASE-6042 is related. 

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