[
https://issues.apache.org/jira/browse/HADOOP-1608?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Edward Yoon updated HADOOP-1608:
--------------------------------
Description:
Development of relational algebra operators has begun.
* Projection
** selects a subset of the columnfamilies of a relation
** Result = π ~column_list~ (Relation)
{code}
Hbase > Result = Relation.Projection('year','legnth');
Hbase > save Result into table('result');
{code}
* Selection
** See : HADOOP-2003 issue's description
{code}
Hbase> Result = Relation.Selection(length > 100 and studioName = 'Fox');
Hbase> save Result into table('result');
{code}
* Product
* Rename
* Group
* Sort
was:
Development of relational algebra operators has begun.
* Projection
** selects a subset of the columnfamilies of a relation
** Result = π ~column_list~ (Relation)
** ex. Result = Relation.Projection('year','legnth');
* Selection
** See : HADOOP-2003
* Product
* Rename
* Group
* Sort
> [HbaseShell] Relational Algrebra Operators
> ------------------------------------------
>
> Key: HADOOP-1608
> URL: https://issues.apache.org/jira/browse/HADOOP-1608
> Project: Hadoop
> Issue Type: Improvement
> Components: contrib/hbase
> Environment: All environments
> Reporter: Edward Yoon
> Priority: Minor
> Fix For: 0.16.0
>
> Attachments: patch_v01.txt, patch_v02.txt, patch_v03.txt
>
>
> Development of relational algebra operators has begun.
> * Projection
> ** selects a subset of the columnfamilies of a relation
> ** Result = π ~column_list~ (Relation)
> {code}
> Hbase > Result = Relation.Projection('year','legnth');
> Hbase > save Result into table('result');
> {code}
> * Selection
> ** See : HADOOP-2003 issue's description
> {code}
> Hbase> Result = Relation.Selection(length > 100 and studioName = 'Fox');
> Hbase> save Result into table('result');
> {code}
> * Product
> * Rename
> * Group
> * Sort
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
