apache/spark — pull request #3278 by ueshin (2014-11-15 04:54:56+00:00)
Title: [SPARK-4420][SQL] Change nullability of Cast from DoubleType/FloatType to DecimalType.

This is follow-up of [SPARK-4390](https://issues.apache.org/jira/browse/SPARK-4390) (#3256).