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Commit 2a0bc867 authored by Tejas Patil's avatar Tejas Patil Committed by Wenchen Fan
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[SPARK-17495][SQL] Support Decimal type in Hive-hash 

## What changes were proposed in this pull request?

Hive hash to support Decimal datatype. [Hive internally normalises decimals](https://github.com/apache/hive/blob/4ba713ccd85c3706d195aeef9476e6e6363f1c21/storage-api/src/java/org/apache/hadoop/hive/common/type/HiveDecimalV1.java#L307) and I have ported that logic as-is to HiveHash.

## How was this patch tested?

Added unit tests

Author: Tejas Patil <tejasp@fb.com>

Closes #17056 from tejasapatil/SPARK-17495_decimal.
parent 207067ea
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