Spark sql and hive into different result with same sql

[FangFang Chen]

Hi all,
Please give some suggestions. Thanks


With following same sql, spark sql and hive give different result. The sql is 
sum(decimal(38,18)) columns.
Select sum(column) from table;
column is defined as decimal(38,18).


Spark version:1.5.3
Hive version:2.0.0


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