[jira] [Resolved] (HBASE-10256) Handling of value argument being null for checkAndDelete

["Andrew Kyle Purtell (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-10256?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Kyle Purtell resolved HBASE-10256.
-----------------------------------------
    Resolution: Won't Fix

> Handling of value argument being null for checkAndDelete
> --------------------------------------------------------
>
>                 Key: HBASE-10256
>                 URL: https://issues.apache.org/jira/browse/HBASE-10256
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: James R. Taylor
>            Priority: Major
>
> IMO, it would be more useful if when a null is supplied as the value for checkAndDelete, that it add the Delete marker if the row exists rather than if it doesn't exist (i.e. the opposite of checkAndPut). I think the most common use case for checkAndDelete is to delete a row if it exists and tell me that you deleted it. With the current implementation, it adds a Delete marker only if the row does not exist when you supply a null value which IMO is not very useful.
> My workaround is to add another "known" KeyValue to my row with a fixed value and then call checkAndDelete passing in this known value. Also, FWIW, if an empty byte array is passed through (a valid value), it treats it the same as if null was passed through, which is another separate bug.



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