[KYLIN-3946] No cube for AVG measure after include count column

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: v2.6.1
• Fix Version/s: v3.0.0-alpha2
• Component/s: Query Engine
• Assignee: Chao Long
• Reporter: Chao Long
• Created: 10/Apr/19 05:41
• Updated: 21/Jan/20 07:43
• Resolved: 12/Apr/19 02:22

Description

Before, avg(col) will use sum(col)/count(1) to calculate.

After including count column aggregation KYLIN-3883, avg(col) will use sum(col)/count(col) to calculate. 

If there is no predefined count(col) measure, query with avg(col) will get exception "NoRealizationFoundException: No realization found for OLAPContext", which will effect the query on old cubes. So we should consider compatibility.

Issue Links

• links to: GitHub Pull Request #593