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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1102) boolean HTable.testRow()
Date Tue, 30 Dec 2008 22:44:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12659971#action_12659971
] 

stack commented on HBASE-1102:
------------------------------

I'd wonder if we should add this what with it not being atomic?  Should it take a row lock?

Should method be called exists rather than testRow?

> boolean HTable.testRow()
> ------------------------
>
>                 Key: HBASE-1102
>                 URL: https://issues.apache.org/jira/browse/HBASE-1102
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>            Priority: Minor
>             Fix For: 0.19.0
>
>         Attachments: 1102-1.patch
>
>
> From up on the list:
> > From: Thibaut
> > Subject: Exist function?
> > To: hbase-user@hadoop.apache.org
> > Date: Tuesday, December 30, 2008, 5:32 AM
> >
> > On a few occasions, I have to check if a key exists in a table or not.
> > 
> > What's the best way to do it? The htable interface doesn't have any function to
check if a key
> > exists or not, and I have to specify at least one column when fetching a key.
> It will be pretty easy to support an client side API addition in HRS. For memcache that
would be  containsKey() on the sorted maps. For disk, HStore could use getClosest() on the
MapFile readers. 
>     boolean testRow(final byte [] row);
>     boolean testRow(String row);

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