Github user goldmedal commented on a diff in the pull request:
https://github.com/apache/spark/pull/19223#discussion_r138800321
--- Diff: python/pyspark/sql/functions.py ---
@@ -1921,10 +1921,12 @@ def from_json(col, schema, options={}):
@since(2.1)
def to_json(col, options={}):
"""
- Converts a column containing a [[StructType]] or [[ArrayType]] of
[[StructType]]s into a
- JSON string. Throws an exception, in the case of an unsupported type.
+ Converts a column containing a [[StructType]], [[ArrayType]] of
[[StructType]]s,
+ a [[MapType]] or [[ArrayType]] of [[MapType]] into a JSON string.
+ Throws an exception, in the case of an unsupported type.
--- End diff --
ok Thanks.
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