Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/2243#discussion_r17087385
--- Diff: python/pyspark/sql.py ---
@@ -971,23 +969,26 @@ def registerFunction(self, name, f,
returnType=StringType()):
>>> sqlCtx.registerFunction("stringLengthInt", lambda x: len(x),
IntegerType())
>>> sqlCtx.sql("SELECT stringLengthInt('test')").collect()
[Row(c0=4)]
- >>> sqlCtx.registerFunction("twoArgs", lambda x, y: len(x) + y,
IntegerType())
--- End diff --
The test cases in docstring will appear in API docs, so it's not good idea
to put many test cases in docstring (especially for edge cases).
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