RupengWang commented on pull request #942:
URL: https://github.com/apache/kylin/pull/942#issuecomment-642487187
## Design test cases
### Prepare test env
- create cube and build segment (2012-01-01 ~ 2013-01-01)
- dimension : price, part_dt
- measure : sum(price)
### Case-1
Make sure the sql result is null and then make sure there's no exception
about "Write metric error.java.lang.NullPointerException" in kylin.log
```sql
select sum(price) from kylin_sales where part_dt > '2014-01-01'
```
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