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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