Support for inferring type date/timestamp/decimal for partition column

Currently, Spark only supports to infer IntegerType, LongType, DoubleType and StringType.

DecimalType is being tried but it seems it never infers type as DecimalType as DoubleType is being tried first.

Also, DateType and TimestampType can be inferred. It seems it is a pretty common to use both for a partition column.

It'd be great if they can be inferred as both rather than just StringType.