Github user map222 commented on a diff in the pull request:

    https://github.com/apache/spark/pull/17469#discussion_r109225302
  
    --- Diff: python/pyspark/sql/column.py ---
    @@ -250,11 +250,39 @@ def __iter__(self):
             raise TypeError("Column is not iterable")
     
         # string methods
    +    _rlike_doc = """ Return a Boolean :class:`Column` based on a regex 
match.\n
    +                :param other: an extended regex expression\n
    +
    +                >>> df.filter( df.name.rlike('ice$') ).collect()
    +                [Row(name=u'Alice', age=1)]
    +                """
    +    _like_doc = """ Return a Boolean :class:`Column` based on a SQL LIKE 
match.\n
    +               :param other: a SQL LIKE pattern\n
    +               See :func:`pyspark.sql.Column.rlike` for a regex version\n
    +
    +               >>> df.filter( df.name.like('Al%') ).collect()
    +               [Row(name=u'Alice', age=1)]
    +                """
    +    _startswith_doc = ''' Return a Boolean :class:`Column` based on a 
string match.\n
    --- End diff --
    
    Are [these the Scala 
docs](http://spark.apache.org/docs/latest/api/scala/index.html#org.apache.spark.sql.Column@rlike(literal:String):org.apache.spark.sql.Column)
 you're referring to? It looks like the Scala Column docs are missing examples 
for a couple more functions that are documented in python (substr, isin). I 
could expand the ticket / PR to include Scala examples for all of these 
functions. I also noticed isNull and isNotNull are not document either.


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