Filter parent materialized partitions before iterating over them during asset backfill BFS #27909
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…ng asset backfill BFS Summary: This fixes an issue where: - You start a backfill on day N - It lasts long enougn that it is a new day and the partition set expands - A parent partition is materialized from one of those new partitions that didn't exist when the backfill was created - the old backfill fails because it tries to iterate over the new partition and finds it doesn't exist > Insert changelog entry or delete this section.
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Summary:
This fixes an issue where:
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