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| author | Matei Zaharia <matei@databricks.com> | 2014-11-01 19:29:14 -0700 |
|---|---|---|
| committer | Michael Armbrust <michael@databricks.com> | 2014-11-01 19:29:14 -0700 |
| commit | 23f966f47523f85ba440b4080eee665271f53b5e (patch) | |
| tree | d796351567f8b187511b9049199cbf99c5826fb3 /pom.xml | |
| parent | 56f2c61cde3f5d906c2a58e9af1a661222f2c679 (diff) | |
| download | spark-23f966f47523f85ba440b4080eee665271f53b5e.tar.gz spark-23f966f47523f85ba440b4080eee665271f53b5e.tar.bz2 spark-23f966f47523f85ba440b4080eee665271f53b5e.zip | |
[SPARK-3930] [SPARK-3933] Support fixed-precision decimal in SQL, and some optimizations
- Adds optional precision and scale to Spark SQL's decimal type, which behave similarly to those in Hive 13 (https://cwiki.apache.org/confluence/download/attachments/27362075/Hive_Decimal_Precision_Scale_Support.pdf)
- Replaces our internal representation of decimals with a Decimal class that can store small values in a mutable Long, saving memory in this situation and letting some operations happen directly on Longs
This is still marked WIP because there are a few TODOs, but I'll remove that tag when done.
Author: Matei Zaharia <matei@databricks.com>
Closes #2983 from mateiz/decimal-1 and squashes the following commits:
35e6b02 [Matei Zaharia] Fix issues after merge
227f24a [Matei Zaharia] Review comments
31f915e [Matei Zaharia] Implement Davies's suggestions in Python
eb84820 [Matei Zaharia] Support reading/writing decimals as fixed-length binary in Parquet
4dc6bae [Matei Zaharia] Fix decimal support in PySpark
d1d9d68 [Matei Zaharia] Fix compile error and test issues after rebase
b28933d [Matei Zaharia] Support decimal precision/scale in Hive metastore
2118c0d [Matei Zaharia] Some test and bug fixes
81db9cb [Matei Zaharia] Added mutable Decimal that will be more efficient for small precisions
7af0c3b [Matei Zaharia] Add optional precision and scale to DecimalType, but use Unlimited for now
ec0a947 [Matei Zaharia] Make the result of AVG on Decimals be Decimal, not Double
Diffstat (limited to 'pom.xml')
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