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https://issues.apache.org/jira/browse/HBASE-33?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12609331#action_12609331
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Jim Kellerman commented on HBASE-33:
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While the proposed solution introduces minimal (and upward compatible) changes
to the API, the changes on the server side will be fairly extensive:
- changing the internal scanner API
- changes to HRegion.HSanner, HStoreScanner, Memcache$MemcacheScanner and
StoreFileScanner
- regression test changes
Given that we are trying to stabilize release 0.2.0 so that we can release it
before Hadoop 0.18.0 is available, is this issue critical for HBase 0.2.0 or
can it be postponed to HBase 0.3.0?
> Add a HTable get/obstainScanner method that retrieves all versions of a
> particular column and row between two timestamps
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-33
> URL: https://issues.apache.org/jira/browse/HBASE-33
> Project: Hadoop HBase
> Issue Type: New Feature
> Components: client
> Reporter: Peter Dolan
> Assignee: Jim Kellerman
> Priority: Blocker
> Fix For: 0.2.0
>
>
> The use case:
> * A weblog application for which rows are user ids and posts are stored in a
> single column, with post date specified by the cell's timestamp. The
> application would then need to be able to display all posts for the last week
> or month.
> * A feedfetcher for which rows are URLs and feed posts are stored in a single
> column with the post publish date or fetch time stored in the cell's
> timestamp. The application would then need to be able to display all posts
> for the last week or month.
> Proposed API:
> // Get all versions of the specified row and column whose timestamps are in
> [minTimestamp, maxTimestamp]
> SortedMap<long, byte[]> getTimestamps(Text row, Text column, long
> minTimestamp, long maxTimestamp);
> // Get all versions of the specified row and column whose timestamps are >=
> minTimestamp
> SortedMap<long, byte[]> getTimestamps(Text row, Text column, long
> minTimestamp);
> I'd be happy to take this on myself, as I need it for the above use cases
> before migrating my application over to HBase.
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