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https://issues.apache.org/jira/browse/HBASE-4256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13150048#comment-13150048
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stack commented on HBASE-4256:
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On 1. I think it depends.
addColumn can specify a (a) cf only, (b) a cf+qualifier, or a list of (c)
cf+qualifiers.
If (a), then the setStartQualifier/setEndQualifier would return items from
within a CF between the specified qualifiers (do you need an
'inclusive/exclusive' flag or you just going to have them be both inclusive of
specified qualifier?)
On (b), i'd think that we'd just return the qualifier only IFF it was within
the setStartQualifier/setEndQualifier bounds.
For (c), we'd return members of the list that are inside the
setStartQualifier/setEndQualifier bounds.
I think I prefer 2. api to 1. api. It maps well to TimeRange. Its a bit more
of a pain specifying 'start x to the end of the row' with api 2. but its
palatable enough.
Ditto on how api 2. plays with addColumn.
> 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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