Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/15354#discussion_r82314175
--- Diff: python/pyspark/sql/functions.py ---
@@ -1729,6 +1729,29 @@ def from_json(col, schema, options={}):
return Column(jc)
+@ignore_unicode_prefix
+@since(2.1)
+def to_json(col, options={}):
+ """
+ Converts a column containing a [[StructType]] into a JSON string.
Returns `null`,
+ in the case of an unsupported type.
+
+ :param col: struct column
+ :param options: options to control converting. accepts the same
options as the json datasource
+
+ >>> from pyspark.sql import Row
+ >>> from pyspark.sql.types import *
+ >>> data = [(1, Row(name='Alice', age=2))]
+ >>> df = spark.createDataFrame(data, ("key", "value"))
+ >>> df.select(to_json(df.value).alias("json")).collect()
+ [Row(json=u'{"age":2,"name":"Alice"}')]
+ """
+
+ sc = SparkContext._active_spark_context
+ jc = sc._jvm.functions.to_json(_to_java_column(col), options)
--- End diff --
@holdenk Thank you for your comment. Could you please a bit elaborate this
comment? I am a bit not sure on what to fix.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
