Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20307#discussion_r162258962
--- Diff: python/pyspark/sql/udf.py ---
@@ -310,14 +310,22 @@ def registerJavaFunction(self, name, javaClassName,
returnType=None):
... "javaStringLength",
"test.org.apache.spark.sql.JavaStringLength", IntegerType())
--- End diff --
Ah, seems we need to fix `:param returnType:` across all other related APIs
saying it takes DDL-formatted type string.
@ueshin, mind opening a minor PR for this - `udf`, `pandas_udf`,
`registerJavaFunction` and `register` separately? If you are busy, will do it
tonight. Doing this here is fine to me too, up to you.
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