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From "Lars Hofhansl (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4256) Intra-row scanning (part deux)
Date Mon, 14 Nov 2011 23:23:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13150069#comment-13150069
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Lars Hofhansl commented on HBASE-4256:
--------------------------------------

On the other hand API 1 maps better to setStartRow, setStopRow.
+1 on everything else Stack said.

Would scanning within a row imply start and end row set? I think it should. To the same row?
(Or are we saying for all rows returned by the scan returns scan only within these column
boundaries?)
If so, maybe we can combine startRow and startQualifier, ditto for stopRow and endQualifier.

Or we can start at RowX, QualifierA and scan to RowY, QualifierB? I.e. for all rows between
RowX and RowY we'd return all column...

                
> Intra-row scanning (part deux)
> ------------------------------
>
>                 Key: HBASE-4256
>                 URL: https://issues.apache.org/jira/browse/HBASE-4256
>             Project: HBase
>          Issue Type: New Feature
>    Affects Versions: 0.90.4
>            Reporter: Jean-Daniel Cryans
>            Assignee: Dave Revell
>            Priority: Critical
>             Fix For: 0.94.0
>
>
> Dave Revell was asking on IRC today if there's a way to scan ranges of *qualifiers* within
a row. That is, to be able to specify a *start qualifier* and an *end qualifier* so that the
Get or Scan seeks directly to the first qualifier and stops at some point which can be predeterminate
by a qualifier or simply a batch configuration (already exists).
> This is particularly useful for large rows with time-based qualifiers.
> Dave also mentioned that another popular database has such a feature that they call "column
slices".

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