[CARBONDATA-138] Scale up value of Avg aggregation for decimal type keeping sync with hive

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.1.0-incubating
• Assignee: Gin-zhj
• Reporter: Venkata Gollamudi
• Created: 04/Aug/16 10:39
• Updated: 16/Aug/16 15:28
• Resolved: 16/Aug/16 15:28

Description

when we do avg aggregation for decimal type:
hive wiil update the precision of the avg result.
e.g: Avg(decimal(30,10)), the result will be cast to decimal(34, 14)
so, carbon should keep the sync with hive, also need to improve the precision
by scaling up.