pabloem commented on a change in pull request #15610:
URL: https://github.com/apache/beam/pull/15610#discussion_r732244061
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File path: sdks/python/apache_beam/io/gcp/bigquery.py
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@@ -785,10 +785,10 @@ def split(self, desired_bundle_size, start_position=None,
stop_position=None):
self.table_reference.projectId = self._get_project()
schema, metadata_list = self._export_files(bq)
- self.split_result = [
+ self.split_result = (
Review comment:
the advantage is that we don't need to hold all of the source objects in
memory at a single time
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