Github user dondrake commented on the pull request:
https://github.com/apache/spark/pull/4521#issuecomment-73984131
@rxin, after thinking about it some more, I agree with @marmbrus . Let me
make another change so _type mappings looks like this:
```
_type_mappings = {
type(None): NullType,
bool: BooleanType,
int: LongType,
long: LongType,
float: DoubleType,
str: StringType,
unicode: StringType,
bytearray: BinaryType,
decimal.Decimal: DecimalType,
datetime.date: DateType,
datetime.datetime: TimestampType,
datetime.time: TimestampType,
}
```
I'll remove my if statement and add some comments around that as well.
This also reduces the risk of the inference seeing a small sample and
choosing IntegerType.
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