deepyaman commented on a change in pull request #27295: Fix src/dest type
documentation for `to_timestamp`
URL: https://github.com/apache/spark/pull/27295#discussion_r368706522
##########
File path: python/pyspark/sql/functions.py
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@@ -1161,7 +1161,7 @@ def to_date(col, format=None):
@since(2.2)
def to_timestamp(col, format=None):
"""Converts a :class:`Column` of :class:`pyspark.sql.types.StringType` or
- :class:`pyspark.sql.types.TimestampType` into
:class:`pyspark.sql.types.DateType`
+ :class:`pyspark.sql.types.DateType` into
:class:`pyspark.sql.types.TimestampType`
Review comment:
Hi @MaxGekk! Yes, it can. The other alternative is:
```python3
def to_timestamp(col, format=None):
"""Converts a :class:`Column` of :class:`pyspark.sql.types.StringType`,
:class:`pyspark.sql.types.DateType`, or
:class:`pyspark.sql.types.TimeStampType` into
:class:`pyspark.sql.types.TimestampType`
```
In that case, the documentation for `to_date` should also be updated to
explicitly say that it converts ```:class:`pyspark.sql.types.DateType` into
:class:`pyspark.sql.types.DateType` ```.
I chose to leave these two cases out because
1. that's how `to_date` does it
2. they're "trivial" cases
Happy to update both as above if you prefer, though.
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