GitHub user guowei2 opened a pull request:
https://github.com/apache/spark/pull/4004
[SPARK-5203][SQL] fix union with different decimal type
When union non-decimal types with decimals, we use the following rules:
- FIRST `intTypeToFixed`, then fixed union decimals with
precision/scale p1/s2 and p2/s2 will be promoted to
DecimalType(max(p1, p2), max(s1, s2))
- FLOAT and DOUBLE cause fixed-length decimals to turn into DOUBLE
(this is the same as Hive,
but note that unlimited decimals are considered bigger than doubles
in WidenTypes)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/guowei2/spark SPARK-5203
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/4004.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4004
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commit cb14704214b3d114d3fe4341885637c04db0f944
Author: guowei2 <[email protected]>
Date: 2015-01-12T08:32:43Z
fix union with different decimal type
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