Github user MrBago commented on a diff in the pull request:
https://github.com/apache/spark/pull/20241#discussion_r161116909
--- Diff: python/pyspark/ml/feature.py ---
@@ -1577,6 +1577,8 @@ class OneHotEncoder(JavaTransformer, HasInputCol,
HasOutputCol, JavaMLReadable,
.. note:: This is different from scikit-learn's OneHotEncoder,
which keeps all categories. The output vectors are sparse.
+ Deprecated in 2.3.0. ``OneHotEncoderEstimator`` will be renamed
``OneHotEncoder`` and this
+ ``OneHotEncoder`` will be removed in 3.0.0..
--- End diff --
Also should this be a separate note?
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