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https://issues.apache.org/jira/browse/KYLIN-4314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17128126#comment-17128126
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ASF GitHub Bot commented on KYLIN-4314:
---------------------------------------
zhangayqian edited a comment on pull request #1088:
URL: https://github.com/apache/kylin/pull/1088#issuecomment-640479276
## Design test cases
### Prepare test env
- create cube and build segment `2012-01-01~2012-02-01`
- dimension: PART_DT, OPS_REGION, SELLER_ID
- measure: count_distinct(SELLER_ID)
### Test Case 1 （For Union in intersect_count()）
- Query-1
```
select
intersect_count(SELLER_ID, OPS_REGION, array['Hongkong']) as h,
intersect_count(SELLER_ID, OPS_REGION, array['Beijing']) as b,
intersect_count(SELLER_ID, OPS_REGION, array['Shanghai']) as s,
intersect_count(SELLER_ID, OPS_REGION, array['Hongkong', 'Beijing']) as
retention_city1
from kylin_sales
```
- Query-2
```
select
intersect_count(SELLER_ID, OPS_REGION, array['Hongkong']) as h,
intersect_count(SELLER_ID, OPS_REGION, array['Beijing']) as b,
intersect_count(SELLER_ID, OPS_REGION, array['Shanghai']) as s,
intersect_count(SELLER_ID, OPS_REGION, array['Shanghai', 'Beijing']) as
retention_city2
from kylin_sales
```
- Query-3
```
select
intersect_count(SELLER_ID, OPS_REGION, array['Hongkong']) as h,
intersect_count(SELLER_ID, OPS_REGION, array['Beijing']) as b,
intersect_count(SELLER_ID, OPS_REGION, array['Shanghai']) as s,
intersect_count(SELLER_ID, OPS_REGION, array['Shanghai', 'Hongkong',
'Beijing']) as retention_city3
from kylin_sales
```
- Query-4
```
select
intersect_count(SELLER_ID, OPS_REGION, array['Hongkong']) as h,
intersect_count(SELLER_ID, OPS_REGION, array['Beijing']) as b,
intersect_count(SELLER_ID, OPS_REGION, array['Shanghai']) as s,
intersect_count(SELLER_ID, OPS_REGION, array['Hongkong|Shanghai',
'Beijing']) as retention_city
from kylin_sales
```
- Expect result
```
retention_city == retention_city1 + retention_city2 - retention_city3
```
### Test Case 2 (For Intersect_value())
```
select
intersect_value(SELLER_ID, OPS_REGION, array['Shanghai', 'Hongkong'
,'Beijing']) as retention_city
from kylin_sales
```
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> Support union in intersect_count() function
> -------------------------------------------
>
> Key: KYLIN-4314
> URL: https://issues.apache.org/jira/browse/KYLIN-4314
> Project: Kylin
> Issue Type: Improvement
> Components: Query Engine
> Reporter: Shao Feng Shi
> Assignee: Shao Feng Shi
> Priority: Minor
> Fix For: v3.1.0, v2.6.6
>
>
> The current version of "intersect_count" only support "intersect" operation.
> While in some cases, we may union some collections(bitmaps) first, and then
> intersect with other collections. For example:
>
> intersect_count(user_id, page_id, array['search', 'view', 'order']);
> -- this calculation how many users did "search", and then "view", and then
> make the "order".
>
> intersect_count(user_id, page_id, array['search|view', 'order']);
> -- this calculation how many users did "search" or "view" (any of them) , and
> then make the "order".
>
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