spark git commit: [SPARK-8420] [SQL] Fix comparision of timestamps/dates with strings (branch-1.4)

Repository: spark Updated Branches: refs/heads/branch-1.4 451c8722a - 65981619b [SPARK-8420] [SQL] Fix comparision of timestamps/dates with strings (branch-1.4) This is branch 1.4 backport of https://github.com/apache/spark/pull/6888. Below is the original description. In earlier versions

spark git commit: [SPARK-8420] [SQL] Fix comparision of timestamps/dates with strings

Repository: spark Updated Branches: refs/heads/master 9814b971f - a333a72e0 [SPARK-8420] [SQL] Fix comparision of timestamps/dates with strings In earlier versions of Spark SQL we casted `TimestampType` and `DataType` to `StringType` when it was involved in a binary comparison with a