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https://issues.apache.org/jira/browse/HBASE-5512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Hofhansl updated HBASE-5512:
---------------------------------
Attachment: 5512-v2.txt
This version should work.
(but see caveats raised before)
> Add support for INCLUDE_AND_SEEK_USING_HINT
> -------------------------------------------
>
> Key: HBASE-5512
> URL: https://issues.apache.org/jira/browse/HBASE-5512
> Project: HBase
> Issue Type: Improvement
> Reporter: Zhihong Yu
> Assignee: Lars Hofhansl
> Attachments: 5512-v2.txt, 5512.txt
>
>
> This came up from HBASE-2038
> From Anoop:
> - What we wanted from the filter is include a row and then seek to the next
> row which we are interested in. I cant see such a facility with our Filter
> right now. Correct me if I am wrong. So suppose we already seeked to one row
> and this need to be included in the result, then the Filter should return
> INCLUDE. Then when the next next() call happens, then only we can return a
> SEEK_USING_HINT. So one extra row reading is needed. This might create even
> one unwanted HFileBlock fetch (who knows).
> Can we add reseek() at higher level?
> From Lars:
> Yep, for that we'd need to add INCLUDE_AND_SEEK_USING_HINT (similar to the
> INCLUDE_AND_SEEK_NEXT_ROW that we already have). Shouldn't be hard to add,
> I'm happy to do that, if that's the route we want to go with this.
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