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https://issues.apache.org/jira/browse/HBASE-6468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13425537#comment-13425537
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Anoop Sam John commented on HBASE-6468:
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FirstKeyValueMatchingQualifiersFilter -> When a CF contains qualifier a,b,c and
the qualifiers provided are b and c, what will happen to the KVs for qualifier
'a' ? Will this be included in the Result? Is this expected?
Can the qualifiers be accommodated in FirstKeyOnlyFilter only? Do we need a new
Filter? Just a though from my side.
By default FirstKeyOnlyFilter allow only the 1st KV (from all the qualifiers)
from a CF to come in the Result and will filter out other KVs.
Specifying a set of qualifiers to FirstKeyOnlyFilter will restrict the
selection of the 1st KV from a any of these qualifiers only. It will filter out
all KVs from other qualifiers.
> 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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