Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/17901#discussion_r115397915
--- Diff: python/pyspark/sql/functions.py ---
@@ -144,12 +144,6 @@ def _():
'measured in radians.',
}
-_functions_2_2 = {
- 'to_date': 'Converts a string date into a DateType using the
(optionally) specified format.',
- 'to_timestamp': 'Converts a string timestamp into a timestamp type
using the ' +
- '(optionally) specified format.',
-}
-
--- End diff --
actually, instead of deleting this we should keep it and we should add
```
for _name, _doc in _functions_2_2.items():
globals()[_name] = since(2.2)(_create_function(_name, _doc))
```
this is for doc tag
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