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Posted to dev@lens.apache.org by "Rajitha R (JIRA)" <ji...@apache.org> on 2017/03/24 11:34:41 UTC

[jira] [Created] (LENS-1404) [New] Virtual Fact

Rajitha R created LENS-1404:
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             Summary: [New] Virtual Fact 
                 Key: LENS-1404
                 URL: https://issues.apache.org/jira/browse/LENS-1404
             Project: Apache Lens
          Issue Type: New Feature
          Components: cube
            Reporter: Rajitha R
            Assignee: Rajitha R


Need :
1. The current Fact definition does not allow a fact to participate in multiple cubes. For scenarios where the same fact needs to be queried in different cubes, this would be a limitation.
2. Fact definition also doesn’t support filters to be applied on the fact data.

Considering the above two major requirements, a new entity called Virtual Fact has been proposed.
Here is a brief overview about the features of Virtual fact : 
1. Virtual fact extends a Fact. 
2. It can belong to a different cube than its parent Fact Cube.
3. It can have additional filters which will be used in query rewriting.



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