Github user BenFradet commented on a diff in the pull request:
https://github.com/apache/spark/pull/10006#discussion_r46471070
--- Diff: docs/ml-features.md ---
@@ -1591,6 +1591,65 @@ transformer.transform(df).show()
</div>
+## SQLTransformer
+
+`SQLTransformer` implements the transforms which are defined by SQL
statement.
+Currently we only support SQL syntax like `"SELECT ... FROM __THIS__ ..."`
+where `"__THIS__"` represents the underlying table of the input dataset.
+The select clause specifies the fields, constants, and expressions to
display in
+the output, it can be any select clause that Spark SQL supported. Users
can also
--- End diff --
supports and not supported
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