[ 
https://issues.apache.org/jira/browse/HBASE-10885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13956297#comment-13956297
 ] 

ramkrishna.s.vasudevan commented on HBASE-10885:
------------------------------------------------

Delete.setCellVisibility() should be supported now. And these labels passed 
here will be only a list of labels and not visibility expressions like A|B!C?
Which means if an existing put had A&B now the delete should pass A&B or it 
could be A,B like how we pass for Authorization?

> Support visibility expressions on Deletes
> -----------------------------------------
>
>                 Key: HBASE-10885
>                 URL: https://issues.apache.org/jira/browse/HBASE-10885
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.98.1
>            Reporter: Andrew Purtell
>             Fix For: 0.99.0, 0.98.2
>
>
> Accumulo can specify visibility expressions for delete markers. During 
> compaction the cells covered by the tombstone are determined in part by 
> matching the visibility expression. This is useful for the use case of data 
> set coalescing, where entries from multiple data sets carrying different 
> labels are combined into one common large table. Later, a subset of entries 
> can be conveniently removed using visibility expressions.
> Currently doing the same in HBase would only be possible with a custom 
> coprocessor. Otherwise, a Delete will affect all cells covered by the 
> tombstone regardless if they are visible to the user issuing the delete or 
> not. This is correct behavior in that no data spill is possible, but 
> certainly could be surprising, and is only meant to be transitional. We 
> decided not to support visibility expressions on Deletes to control the 
> complexity of the initial implementation.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Reply via email to