fhan688 opened a new pull request, #3434:
URL: https://github.com/apache/fluss/pull/3434
### Purpose
Linked issue: https://github.com/apache/fluss/issues/3351
This PR allows `table.auto-partition.num-precreate` to be altered
dynamically after table creation.
Before this change, auto partition retention could be updated by `ALTER
TABLE`, but `table.auto-partition.num-precreate` was rejected by alter table
validation. This PR enables users to increase or decrease the number of pre-
created auto partitions without recreating the table.
### Brief change log
- Add `table.auto-partition.num-precreate` to alterable Fluss table
options.
- Refresh `AutoPartitionManager` when either `num-retention` or
`num-precreate` changes.
- When `num-precreate` is increased, missing future partitions are created
after the table property change is observed.
- When `num-precreate` is decreased, existing pre-created partitions are
kept, and future auto partition runs stop over-creating partitions.
- Add server-side coverage for updating `num-precreate`.
- Add Flink catalog IT coverage for `ALTER TABLE SET/RESET
('table.auto-partition.num-precreate' ...)`.
- Update docs for Flink DDL/options and partitioning behavior.
### Tests
- `AutoPartitionManagerTest#testUpdateAutoPartitionNumPrecreate`
- `Flink120CatalogITCase#testAlterAutoPartitionNumPrecreate`
- `git diff --check`
### API and Format
This change does not modify RPC protocol, storage format, or serialized
metadata format.
It expands the supported dynamic table property set by allowing
`table.auto-partition.num-precreate` to be changed through `ALTER TABLE SET`
and reset through `ALTER TABLE RESET`.
### Documentation
Updated documentation:
- `website/docs/engine-flink/ddl.md`
- `website/docs/engine-flink/options.md`
- `website/docs/table-design/data-distribution/partitioning.md`
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