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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-1014) query language
Date Thu, 31 Jan 2013 01:59:13 GMT
Eric Newton created ACCUMULO-1014:
-------------------------------------

             Summary: query language
                 Key: ACCUMULO-1014
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1014
             Project: Accumulo
          Issue Type: Improvement
          Components: client
            Reporter: Eric Newton
            Assignee: Billie Rinaldi
             Fix For: 1.6.0


Implement a query language.

We can do some basic selection/projection and roll-up using iterators.

I'm thinking something like:

{noformat}
using LatLonRow;
SELECT * 
 WHERE row MATCHES LatLonRow.ranges('0.0', '0.0', '0.25', '0.25')
   AND columnFamily == 'mapLevel2'
;
{noformat}

Given a table structure, we can support the expressiveness of JEXL and the wikisearch example.


{noformat}
using ShardDocument;
SELECT ShardDocument.document(row)
 WHERE row MATCHES ShardDocument.ranges('1990-01-01', '2012-11-10')
   AND ShardDocument.jexl(
     'author ~= ".*Adams" and body = "don't" and body = 'panic'
      );
{noformat}

I'm sure the syntax is highly suspect, but abuse of the index as well as the indexing structure
ought to be something expressible to mere mortals.


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