Roger Shi created KYLIN-2765:
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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.
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