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https://issues.apache.org/jira/browse/HADOOP-2386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12557920#action_12557920
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Thomas Garner commented on HADOOP-2386:
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+1 vote for this feature request. The timestamp should be promoted to a first
class citizen. For any timestamped data, reading it back without knowing the
timestamp at which it was written is undesirable. I would imagine it
worthwhile to have scanners return access to the timestamp as well.
> [hbase] Method to get a number of timestamped versions of a row all at once
> ---------------------------------------------------------------------------
>
> Key: HADOOP-2386
> URL: https://issues.apache.org/jira/browse/HADOOP-2386
> Project: Hadoop
> Issue Type: New Feature
> Components: contrib/hbase
> Reporter: Bryan Duxbury
> Priority: Trivial
>
> If you have rows that are densely populated (most versions have all the
> columns) and heavily versioned, and if you are doing things like checking
> difference between the versions, it would be really handy to be able to get
> all of the versions and data at once. This method would let you do that.
> {code}
> Map<long, Map<Text, byte[]>> getRowTimestampsWithColumns(Text row);
> Map<long, Map<Text, byte[]>> getRowTimestampsWithColumns(Text row, Text[]
> columns);
> Map<long, Map<Text, byte[]>> getRowTimestampsWithColumns(Text row, Text[]
> columns, long timestamp);
> Map<long, Map<Text, byte[]>> getRowTimestampsWithColumns(Text row, Text[]
> columns, long timestamp, int numVersions);
> {code}
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