[ACCUMULO-1014] query language

• Type: Wish
• Status: Resolved
• Priority: Trivial
• Resolution: Won't Fix
• Component/s: client
• Assignee: Unassigned
• Reporter: Eric C. Newton
• Created: 31/Jan/13 01:59
• Updated: 03/Oct/14 19:33
• Resolved: 03/Oct/14 19:33

Description

Implement a query language.

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

I'm thinking something like:

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

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

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'
      );

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.