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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1481) Add fast row key only scanning
Date Thu, 01 Oct 2009 01:11:23 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12761067#action_12761067
] 

Jonathan Gray commented on HBASE-1481:
--------------------------------------

I have an idea for this.  Easy enough for 0.20.1 and 0.21.  Patch coming soon.

> 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
>            Priority: Minor
>             Fix For: 0.21.0
>
>
> 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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