robertwb commented on a change in pull request #13848:
URL: https://github.com/apache/beam/pull/13848#discussion_r567136406
##########
File path:
sdks/python/apache_beam/runners/portability/fn_api_runner/translations.py
##########
@@ -598,9 +606,33 @@ def copy_subtransforms(transform):
del new_proto.root_transform_ids[:]
new_proto.root_transform_ids.extend(roots)
+ known_primitives = set.union(set(BEAM_PRIMITIVES), known_runner_urns)
+ for transform in pipeline_proto.components.transforms.values():
+ if transform.spec.urn not in known_primitives and not is_composite(
+ transform):
+ known_primitives.add(transform.spec.urn)
+ if not partial:
+ known_primitives.add('beam:runner:executable_stage:v1')
+ validate_pipeline(new_proto, known_primitives)
+
return new_proto
+def is_composite(transform):
+ return bool(
+ transform.subtransforms or not set.difference(
+ set(transform.outputs.values()), transform.inputs.values()))
Review comment:
Consider a "switch" transform parameterized by a boolean that takes two
PCollections and returns exactly one of them. Or, consider PTransform that
sometimes returns its input unchanged (possibly as a degenerate case, such
things exist in TFX).
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