[PR] [docs] Correct PyPaimon system table filter and column docs [paimon]

["Stephen0421 (via GitHub)" <gi...@apache.org>]

Stephen0421 opened a new pull request, #10720:
URL: https://github.com/apache/paimon/pull/10720

   ### Purpose
   
   `docs/docs/pypaimon/system-tables.md` still describes behavior that PyPaimon no longer has.
   
   - `with_filter` is documented as always raising `NotImplementedError`. System-table reads already apply equality, comparison, `in`, null checks, and string predicates (`startswith`, `endswith`, `contains`, `like`) in memory, before projection and limit. Value comparisons on nested columns such as `$files.write_cols` still raise `NotImplementedError`.
   - `$tags.create_time` and `time_retained` are documented as always `NULL`. They are `NULL` only when the tag was created without retention. A tag created with `time_retained` fills `create_time` and stores the duration as Java `Duration` text (`1d` becomes `PT24H`).
   - `$manifests.min_partition_stats` and `max_partition_stats` are documented as always `NULL`. They now use the same `{v1, v2}` text as Java (`{}` for an unpartitioned table). The value stays `NULL` only when a partition field is `FLOAT`, `DOUBLE`, `TIMESTAMP_LTZ`, `BINARY`, `VARBINARY`, or `BYTES`.
   
   ### Tests
   
   Documentation only. No runtime code changes. The behavior is already covered by `system_string_filter_test.py`, `tags_table_test.py`, and `manifests_table_test.py`.


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Re: [PR] [docs] Correct PyPaimon system table filter and column docs [paimon]

["JingsongLi (via GitHub)" <gi...@apache.org>]

JingsongLi merged PR #10720:
URL: https://github.com/apache/paimon/pull/10720


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Re: [PR] [docs] Correct PyPaimon system table filter and column docs [paimon]

["JingsongLi (via GitHub)" <gi...@apache.org>]

JingsongLi commented on PR #10720:
URL: https://github.com/apache/paimon/pull/10720#issuecomment-6355270503

   +1


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