hbase-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Doğacan Güney (JIRA) <j...@apache.org>
Subject [jira] Created: (HBASE-899) Support for specifying a timestamp and numVersions on a per-column basis
Date Tue, 23 Sep 2008 23:01:44 GMT
Support for specifying a timestamp and numVersions on a per-column basis
------------------------------------------------------------------------

                 Key: HBASE-899
                 URL: https://issues.apache.org/jira/browse/HBASE-899
             Project: Hadoop HBase
          Issue Type: New Feature
            Reporter: Doğacan Güney


This is just an idea and it may be better to wait after the planned API changes. But I think
it would be useful to support fetching different timestamps and versions for different columns.

Example:

If a row has 2 columns, "col1:" and "col2:" I want to be able to ask for (during scan or read
time, doesn't matter) 2 versions of "col1:" (maybe even between timestamps t1 and t2) but
only 1 version of "col2:". This would be especially handy if during an MR job you have to
read 2 versions of a small column, but do not want the overhead of reading 2 versions of every
other column too....

(Also, the mechanism is already there. I mean, making the changes to support a per-column
timestamp/numVersions is  ridiculously easy :)

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message