uros-b commented on code in PR #56726:
URL: https://github.com/apache/spark/pull/56726#discussion_r3466627311
##########
python/pyspark/sql/connect/column.py:
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@@ -419,6 +419,10 @@ def alias(self, *alias: str, **kwargs: Any) ->
ParentColumn:
name = alias
+ @property
+ def _name(self) -> str:
+ return self._expr.__repr__()
Review Comment:
Note: undocumented Classic/Connect output divergence. The docstring's
cast("int") -> 'CAST(a AS INT)' happens to agree, but Spark's own
CastExpression.__repr__ (connect/expressions.py:1005-1008) documents
cast("long") -> CAST(a AS BIGINT) (Classic) vs CAST(a AS LONG) (Connect). _name
inherits this, so the PR's stated motivating use-case ("branch on the name
inside a helper function") is backend-dependent and unreliable.
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