jzhan-2026 commented on code in PR #59108:
URL: https://github.com/apache/spark/pull/59108#discussion_r4383628272
##########
python/pyspark/sql/transpile.py:
##########
@@ -912,6 +1003,15 @@ def _transpile_from_ast(
"interpreted Python"
)
converted = self._convert_chunk(params, function_body[0])
+ if self._null_guard_emitted:
+ warnings.warn(
+ "Python UDF transpiler: the transpiled UDF includes a NULL
guard "
+ "that raises at runtime when a NULL input is encountered. Add
an "
+ "`if x is not None` guard around comparisons, or filter NULLs "
+ "upstream, to avoid this.",
+ UserWarning,
+ stacklevel=2,
+ )
Review Comment:
Thanks!
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