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Properly propagate schemas of Beam YAML Partition transform. #34595

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Merged
merged 1 commit into from
Apr 22, 2025
Merged

Properly propagate schemas of Beam YAML Partition transform. #34595

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3 changes: 3 additions & 0 deletions sdks/python/apache_beam/yaml/yaml_mapping.py
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Original file line number Diff line number Diff line change
Expand Up @@ -814,6 +814,9 @@ def split(element):
mapping_transform = mapping_transform.with_outputs(*output_set)
splits = pcoll | mapping_transform.with_input_types(T).with_output_types(T)
result = {out: getattr(splits, out) for out in output_set}
for tag, out in result.items():
if tag != error_output:
out.element_type = pcoll.element_type
if error_output:
result[error_output] = result[error_output] | map_errors_to_standard_format(
pcoll.element_type)
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1 change: 1 addition & 0 deletions sdks/python/apache_beam/yaml/yaml_mapping_test.py
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Expand Up @@ -212,6 +212,7 @@ def test_partition(self):
language: python
outputs: [even, odd]
''')
self.assertEqual(result['even'].element_type, elements.element_type)
assert_that(
result['even'] | beam.Map(lambda x: x.element),
equal_to(['banana', 'orange']),
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