Colin Ma created HIVE-16311:
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Summary: Improve the performance for FastHiveDecimalImpl.fastDivide
Key: HIVE-16311
URL: https://issues.apache.org/jira/browse/HIVE-16311
Project: Hive
Issue Type: Improvement
Affects Versions: 2.2.0
Reporter: Colin Ma
Assignee: Colin Ma
Fix For: 2.2.0
FastHiveDecimalImpl.fastDivide is poor performance when evaluate the expression
as 12345.67/123.45
There are 2 points can be improved:
1. Don't always use HiveDecimal.MAX_SCALE as scale when do the
BigDecimal.divide.
2. Get the precision for BigInteger in a fast way if possible.
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