Reviewed all 10 changed paths at commit 4e60704. One new P2 finding concerns repeated full-schema searches during per-file partition planning. No P0/P1 finding and no existing blocking inline comments were identified.

Critical checkpoint conclusions:

1. Goal and correctness: preserved root names now agree with Doris scan slots; partition keys and per-file values resolve against the same pinned schema. The added unit and regression cases cover mixed case, historical renames, nested fields, Top-N carriers, eager/streaming ranges and counts. Static FE-to-BE tracing supports the intended correction.
2. Scope and reuse: focused Iceberg carrier changes; parameter/comment renames match existing case-preserved handles. P2 below identifies an available indexed lookup that should be reused.
3. Concurrency: no new threads, locks or shared mutable state. Streaming captures an immutable Schema and retains its existing single-consumer contract.
4. Lifecycle: iterator ownership, close/error paths, count retries and one-file scratch lifetime remain intact. No new static initialization or ownership dependency.
5. Configuration: no configuration items added or changed.
6. Compatibility: existing schema transport and symbols are retained. V1 exact root lookup agrees with preserved slots; V2 resolves roots case-insensitively/by field ID. Nested names remain lowercase.
7. Thrift/protobuf: no definitions, IDs or required fields changed.
8. Parallel paths: eager, streaming, manifest-count representative, file-task count fallback, Top-N, equality-delete and system-table paths were inspected; schema propagation is consistent.
9. Conditions and errors: existing empty-pin, system-table, binary/fixed partition and count safety gates remain. Missing requested columns and malformed schema carriers continue to fail explicitly; nested partition sources are excluded consistently.
10. Test coverage: new JUnit cases and nine ORC regression queries exercise the changed naming contract. The SQL does not explicitly assert Top-N materialization plan activation; equality-delete runtime coverage and wide-table planning performance are not added here. No concrete correctness failure was found in those paths.
11. Expected results: all nine output labels align with queries; sorted rows, nested values, historical/current row sets, limits and counts of 2/3 match the inserted data. Output generation and author-reported executions were not independently reproduced.
12. Observability: existing schema/decode/planning errors remain adequate for this local carrier change; no new distributed operation requires metrics or logging.
13. Transactions and persistence: no EditLog, transaction, replay, durability or failover behavior is changed.
14. Writes and crash cleanup: production changes affect read planning only; no new data-write atomicity or cleanup requirement.
15. FE-to-BE variables: no new protocol variable; existing schema-name and path-key/value carriers were traced through both native reader generations.
16. Performance: P2 below adds work proportional to schema width for every file on identity-partitioned scans. The operation count follows directly from the loops; runtime latency was not measured.
17. Other concerns and user focus: no extra user focus was supplied. Initial casing/equality and pinned-partition correctness risks were dismissed with concrete caller/reader evidence; the lookup performance issue is the sole accepted finding.

Validation was static only, as required: no builds, tests, source edits or mixed-version cluster execution. All changed paths and candidate dispositions are covered; no unresolved code candidate remains. The independent confirmation round and final sweep determine the convergence result recorded with this delivery.

Review converged after 2 round(s).

Reviewed all ten changed files at 4e60704ac3b634d97c1d745af08663d6e42d8115. No new inline findings. The existing P2 identity-source lookup finding still applies: source-name lookup now scans the top-level schema for each identity field of each distinct data file. It is already covered and was not reposted. There are no existing P0/P1 findings to carry forward.

Review converged in 1 round: both complete-review subagents and the additional risk reviewer returned NO_NEW_VALUABLE_FINDINGS against the same empty new-comment set. All candidates and risk questions have evidence-based dispositions; no changed-path coverage gap or unresolved code candidate remains.

Validation limits: this was a static review, with no builds, tests or source modifications. Author-reported executions were not reproduced. The new regression does not force a particular scanner version or lazy-materialization plan, and mixed-case equality-delete application was traced through both BE implementations rather than executed end to end. These execution limits do not leave an unresolved code candidate.

Review converged after 1 round(s).

No new actionable findings in PR #69382 at 4450fac. All 10 changed paths and 52 diff hunks were reviewed, including their relevant upstream/downstream consumers. The review converged in 1 round: both general reviewers and the separate risk reviewer returned NO_NEW_VALUABLE_FINDINGS against the same empty inline set.

Existing P2 thread 4334582627 is fixed at this head: topLevelSourceColumnName now calls asStruct().field(sourceId), which uses a cached direct-child ID map in Iceberg 1.12.0. It is not reposted. No existing P0/P1 applies. No additional user focus was supplied.

Critical checkpoint conclusions:

1. Goal: the inspected code aligns top-level dictionary names, identity partition keys and per-file values with the selected scan schema. Added unit and regression cases target mixed-case and historical reads.
2. Scope and reuse: the changes are focused on Iceberg name/schema propagation, reuse existing selectors, and cover internal signature plumbing without broad API changes.
3. Concurrency and locks: no new threads or locks. Statement-frozen metadata and an immutable captured Schema keep naming stable; streaming scratch remains source-local.
4. Lifecycle and initialization: existing iterable/iterator cleanup is preserved. The new schema reference follows split-source lifetime; no new resource cycle or static initialization dependency.
5. Configuration: none added or changed; dynamic update requirements do not apply.
6. Compatibility: no public SPI, function symbol or storage-format change. Existing carriers retain stable field IDs and now match case-preserved slots.
7. Thrift/protobuf: no definitions, field IDs or enum values changed.
8. Parallel paths: eager, streaming, both count strategies and cache fallbacks pass the selected schema; pinned, ref, equality-delete, Top-N and system-table paths were traced.
9. Special conditions: identity-only/top-level source restrictions match engine slot classification. Dropped IDs cannot bind reused names; nested fields remain file-decoded and nested dictionary names remain lowercase.
10. Test coverage: new tests inspect full-schema/equality case, historical partition names, Top-N dictionaries and eager/streaming carriers. Existing negative/evolution/count tests were inspected for the affected contracts.
11. Expected results: all nine regression sections match their queries; ordering is deterministic, and rows, limits and pinned/current counts agree with setup by inspection.
12. Observability: existing metadata errors and scan metrics remain sufficient for this local carrier correction; no new workflow needs instrumentation.
13. Transactions/persistence/failover: no transaction, EditLog, commit or replay behavior changed. Existing snapshot selection is preserved; native MoW/version-write invariants are outside the change.
14. Writes and atomicity: no data-write or recovery protocol change. The reused static-partition helper retains equivalent direct-root lookup semantics.
15. FE/BE propagation: existing schema dictionaries and partition key/value carriers agree with slot names in both reader generations. Top-N refetch retains the source schema parameters.
16. Performance and memory: no schema copy or growing per-file cache is introduced. Indexed source lookup removes the existing schema-width multiplier while retaining bounded scratch state.
17. Other risks: rename/drop/reuse, schema-only commits, empty pins, nested source collisions, historical equality IDs and row-lineage paths were rechecked; no unresolved static correctness candidate remains.

Validation limits: this was a static-only review as required; no builds or tests were run. The author's reported test success and generated-output provenance were not independently reproduced. No physical Top-N plan or equality-delete read was observed at runtime; the new regression does not itself create equality-delete data. These are runtime validation limits, with no uncovered assigned static scope.

Review converged after 1 round(s).

Reviewed scan-slot/schema-dictionary names, pinned-schema partition field IDs, eager/streaming/count paths and TopN/equality carriers at 4450fac. No blocking issue found. The indexed lookup addresses the earlier review comment. Static source review only; no local build or test execution. P0 Regression was pending when checked.