Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/18498#discussion_r125190454
--- Diff: python/pyspark/sql/functions.py ---
@@ -1839,15 +1839,19 @@ def from_json(col, schema, options={}):
string.
:param col: string column in json format
- :param schema: a StructType or ArrayType of StructType to use when
parsing the json column
+ :param schema: a StructType or ArrayType of StructType to use when
parsing the json column.
:param options: options to control parsing. accepts the same options
as the json datasource
+ .. note:: Since Spark 2.3, the DDL-formatted string is also supported
for ``schema``.
--- End diff --
ah nicer.
yes, we should document the behavior where the code already supports it
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