Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/17192#discussion_r105602228
--- Diff: python/pyspark/sql/functions.py ---
@@ -1802,10 +1802,10 @@ def from_json(col, schema, options={}):
@since(2.1)
def to_json(col, options={}):
"""
- Converts a column containing a [[StructType]] into a JSON string.
Throws an exception,
- in the case of an unsupported type.
+ Converts a column containing a [[StructType]] or [[ArrayType]] into a
JSON string.
+ Throws an exception, in the case of an unsupported type.
--- End diff --
Hm, in that sense, there are many instances, for example, `Returns the
double value`, `Returns the positive value` or ``Returns `null` ...``. They
return a column. Another example is, `Extracts json object ...`. It does not
extract it right there but make a column.
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