[jira] [Created] (KYLIN-2765) Eliminate restriction on Global Dictionary of Dim columns

["Roger Shi (JIRA)" <ji...@apache.org>]

Roger Shi created KYLIN-2765:
--------------------------------

             Summary: Eliminate restriction on Global Dictionary of Dim columns
                 Key: KYLIN-2765
                 URL: https://issues.apache.org/jira/browse/KYLIN-2765
             Project: Kylin
          Issue Type: Improvement
          Components: Job Engine, Metadata, Query Engine
            Reporter: Roger Shi
            Assignee: Dong Li


Cube dimension column is not allow to be in accurate-count-distinct measure. Global Dictionary encoding is a kind of dict in metadata. Dict encoding is created for dim at the beginning, so Global Dictionary is a special one for measure.

To eliminate the restriction, there're two possible ways in my view. One is move Global Dictionary metadata out of dict section to a new section such as "measure dict" (not there now, create a new one). The other way is handle Global Dictionary differently in both cubing engine and query engine.

There might be other better methods. Let's discuss here and find a good way out. 



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)