HyukjinKwon commented on a change in pull request #27406:
[SPARK-30681][PYSPARK][SQL] Add higher order functions API to PySpark
URL: https://github.com/apache/spark/pull/27406#discussion_r375627199
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File path: python/pyspark/sql/functions.py
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@@ -2840,6 +2840,463 @@ def from_csv(col, schema, options={}):
return Column(jc)
+def _unresolved_named_lambda_variable(*name_parts):
+ """
+ Create `o.a.s.sql.expressions.UnresolvedNamedLambdaVariable`,
+ convert it to o.s.sql.Column and wrap in Python `Column`
+
+ :param name_parts: str
+ """
+ sc = SparkContext._active_spark_context
+ name_parts_seq = _to_seq(sc, name_parts)
+ expressions = sc._jvm.org.apache.spark.sql.catalyst.expressions
+ return Column(
+ sc._jvm.Column(
+ expressions.UnresolvedNamedLambdaVariable(name_parts_seq)
+ )
+ )
+
+
+def _get_lambda_parameters(f):
Review comment:
@zero323, can we remove `_get_lambda_parameters` and
`_get_lambda_parameters_legacy` here too for now? Let's discuss and figure out
a better way in the next PR about this.
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