Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm
Precedence: bulk
Date: Wed, 10 Aug 2011 19:24:28 +0000 (UTC)
From: "Wayne (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: 
 <75376033.24952.1313004268852.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Created] (HBASE-4187) Add Thrift Column Start/Stop
 Read/Scan Capability
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit

Add Thrift Column Start/Stop Read/Scan Capability
-------------------------------------------------

                 Key: HBASE-4187
                 URL: https://issues.apache.org/jira/browse/HBASE-4187
             Project: HBase
          Issue Type: New Feature
          Components: thrift
    Affects Versions: 0.90.3
            Reporter: Wayne


It would be great to be able to make requests through thrift for a subset of a row via a start/stop column pattern. Below are three different read patterns any of which would significantly help reading columns through thrift. 

>From a single request perspective it would be nice to be able to specify a start/stop col to read in one call everything for that row with the specified start/stop column.

getRowWithColumnRange(tableName, row, startColumn, stopColumn)


It would also be very useful to set up a column scanner where we could stop at any point. Basically instead of scanning rows we would scan columns for a given row. In the below example we would set up a scanner to scan the columns and we could read xx cols back at a time and stop any time we had "enough" data.

colScanID = colScannerOpenWithStop(tableName, row, startColumn, stopColumn)
colScannerGetList(colSanID,1000)


Lastly is would also be useful/flexible to expose columns to the current row scanner process to basically be able to cross rows and still only receive XX column values. The new scannerGetCols method below would return 1000 col values at a time instead of XX rows at a time like a normal scannerGetList. This scanner would also be able to cross rows seamlessly if needed.

scanID = scannerOpen(tableName, row)
scannerGetCols(scanID,1000)


--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira