[jira] [Updated] (LENS-1459) Time union candidate creation phase is creating a combination with redundant candidates

["Rajat Khandelwal (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LENS-1459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rajat Khandelwal updated LENS-1459:
-----------------------------------
    Status: Patch Available  (was: Open)

> Time union candidate creation phase is creating a combination with redundant candidates
> ---------------------------------------------------------------------------------------
>
>                 Key: LENS-1459
>                 URL: https://issues.apache.org/jira/browse/LENS-1459
>             Project: Apache Lens
>          Issue Type: Bug
>          Components: cube
>            Reporter: Rajat Khandelwal
>            Assignee: Rajat Khandelwal
>         Attachments: LENS-1459.2017-08-16_16:28:29.patch
>
>
> After the optimization in LENS-1452, Combinations as mentioned in the jira summary can get created. Say the time range queried is {{\[f, t)}}, Candidate {{a}} and {{b}} can cover {{\[f, m)}} and candidate {{c}} can cover {{\[m, t)}}. Say a Union candidate is represented as {{U(cand1, cand2,...)}}. Then the code creates {{U(a,b,c), U(a,c) and U(b,c)}}. If {{U(a,b,c)}} is picked as final candidate, then one of {{a}} or {{b}} doesn't resolve partitions and {{time_range_in}} clause is left as it is for that. 



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