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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-803) Atomic increment operations
Date Fri, 08 Aug 2008 19:05:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12621011#action_12621011

Jonathan Gray commented on HBASE-803:

Unfortunately I have to switch my focus to another project for the next few days.

I will post the patch I have now so you can see what I'm doing, but it is still buggy.  incrementFamilyColumn
is a bit odd and may not work at all.

> 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
>            Assignee: 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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