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https://issues.apache.org/jira/browse/HBASE-803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12620998#action_12620998
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Jonathan Gray commented on HBASE-803:
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Currently I am doing an actual byte increment. I may actual do as you propose,
passing a modify method. But for now I'm leaving as a straight byte-increment.
This includes adding additional bytes if you overflow your array size. I
should have a patch up today so you can see.
I completely agree that this functionality is probably too specialized for
HTable api. I'm doing it for internal use and I know of at least one other
person who wants similar behavior. So I figured I'd put it out there for
others to see or use.
> Atomic increment operations
> ---------------------------
>
> Key: HBASE-803
> URL: https://issues.apache.org/jira/browse/HBASE-803
> Project: Hadoop HBase
> Issue Type: New Feature
> Components: client, ipc, regionserver
> Affects Versions: 0.2.0
> Reporter: Jonathan Gray
> Priority: Minor
> Fix For: 0.2.1
>
>
> Discussion was already started in HBASE-798
> First version will contain to additional HTable methods:
> incrementColumnValue(table,row,family:column) -> Inserts a new version of the
> specified column (which must already exist) with an incremented cell value.
> incrementFamilyColumn(table,row,family: ) -> Inserts a new column under the
> specified family. This assumes the family always contains only one column.
> That column is read, incremented, deleted, and a new column is inserted with
> the incremented column name. The existing value is re-inserted unchanged to
> the new column.
> I'm going to be making even more specialized versions of these for internal
> use (taking apart byte[]'s, doing different bit/byte operations, and assorted
> munging...). So if anyone has any requests for other specialized versions,
> or more generic versions, please post them here and I'd be more than happy to
> take a stab at them.
> Next week I will likely have a go at HBASE-493
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