Are you looking at trunk code ?
In trunk, take a look at HRegion.checkAndMutate() where you can specify
ByteArrayComparable which does the comparison (matching).
There is still the limit of single value:
} else if (result.size() == 1 && !valueIsNull) {
KeyValue kv = result.get(0);
For the moment, only Put and Delete are supported:
if (!isPut && !(w instanceof Delete))
throw new DoNotRetryIOException("Action must be Put or Delete");
If you have suggestion on how the check part can be more general, please
comment.
Thanks
On Sat, Nov 17, 2012 at 7:30 PM, Mike Spreitzer <[email protected]> wrote:
> If I understand correctly, an HTable has two composite atomic operations,
> checkAndPut and checkAndDelete. The check part checks just a single
> column's value. Why not allow checking more than one column?
>
> Why no checkAndAppend?
>
> The checkAndPut operation can put to multiple columns, right? And the
> checkAndDelete operation can delete multiple columns, right? Why not let
> them be mixed? Why not checkAndMutate?
>
> Thanks!
> Mike
