[python] Implement partition expiration for pypaimon#7918
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Add automatic partition expiration support with two strategies: - values-time: parse partition field values as timestamps - update-time: use last file creation time from manifests New module pypaimon/partition/ with: - PartitionTimeExtractor: extracts datetime from partition values - PartitionExpireStrategy: abstract base + two implementations - PartitionExpire: orchestration class reading manifests and dropping partitions Also adds: - Table-level API: table.expire_partitions() - CLI command: paimon table expire-partitions - Partition expiration options in CoreOptions - Unit tests (28 tests)
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Purpose
Add pypaimon support for expiring partitions based on table options and CLI overrides, matching the Java partition expiration behavior for
values-timeandupdate-timestrategies.This includes:
FileStoreTable.DateTimeFormatter-style timestamp formatter support.table expire-partitionsCLI command.CoreOptions.partition.default-name.partition.expiration-max-num=100.Tests
Added
paimon-python/pypaimon/tests/partition_expire_test.pycovering:yyyyMMdd.values-time.update-time.