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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-1481) Add fast row key only scanning
Date Thu, 01 Oct 2009 12:25:23 GMT

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

Jonathan Gray updated HBASE-1481:
---------------------------------

    Fix Version/s: 0.20.1
     Release Note:   (was: Moving this new 'feature' to 0.21.0.)

This patch is actually against 0.20.1.  Looks like release of it is going to get pushed back
a bit, so I'm for putting this in to 0.20.1 since it's such a simple addition (and quite useful).

Patch also includes unit test.  Going to look at making another patch that actually adds this
in to any built-in row counting mechanisms.

> 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
>
>
> 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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