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https://issues.apache.org/jira/browse/HBASE-1481?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Gray updated HBASE-1481:
---------------------------------

    Status: Patch Available  (was: Open)

Seems to work.  Is this enough for this issue for now?  We should revisit 
additional optimizations once we have better hfile seeking.

> Add fast row key only scanning
> ------------------------------
>
>                 Key: HBASE-1481
>                 URL: https://issues.apache.org/jira/browse/HBASE-1481
>             Project: Hadoop HBase
>          Issue Type: Improvement
>    Affects Versions: 0.19.3
>            Reporter: Lars George
>            Assignee: Jonathan Gray
>            Priority: Minor
>             Fix For: 0.20.1, 0.21.0
>
>         Attachments: HBASE-1481-v1.patch, HBASE-1481-v2.patch
>
>
> Instead of requiring a user to set up a scanner with any column and scan the 
> table to gather all row keys while ignoring the column value we should have a 
> fast and lightweight scanner that for example takes a "null" for the column 
> list and then simply returns only the matching keys of all non-empty or 
> deleted rows. Filters should still be applicable.

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