github-actions[bot] commented on PR #61738:
URL: https://github.com/apache/doris/pull/61738#issuecomment-4131420026

   ## Code Review: Dead Code Removal
   
   Reviewed all 92 changed files (1,781 lines deleted, 1 line added). This is a 
pure dead code removal PR with no behavioral changes.
   
   ### Critical Checkpoint Conclusions (Part 1.3)
   
   - **Goal**: Remove dead code from FE `analysis`, `common`, `nereids`, 
`planner`, and `qe` packages. **Achieved** — all 13 deleted classes and all 
deleted methods/fields verified as having zero remaining references in the 
codebase.
   - **Minimal and focused**: Yes — pure deletions, no logic changes.
   - **Concurrency**: Not applicable — no concurrency-related code added or 
modified.
   - **Lifecycle management**: Not applicable.
   - **Configuration items**: None added.
   - **Incompatible changes / storage formats**: None. Verified no 
`@SerializedName`, `@JsonProperty`, `Writable`, `GsonPostProcessable`, or 
EditLog-related code is affected by the removals.
   - **Parallel code paths**: Not applicable — removals only.
   - **Special conditional checks**: Not applicable.
   - **Test coverage**: No tests needed — dead code removal cannot change 
behavior.
   - **Observability**: Not applicable.
   - **Transaction/persistence**: Verified safe. The `needTableStable` field in 
`AlterTableOp` was write-only (never read). The `DistributionDesc.type` field 
was write-only. No persistence paths affected.
   - **Data writes**: Not applicable.
   - **FE-BE variables**: Not applicable.
   - **Performance**: No concerns — removing dead code marginally reduces class 
loading and compilation time.
   - **Other issues**: One observation (not a bug): `BucketSpecifyInstances` 
and `DefaultSpecifyInstances` were the only concrete subclasses of the abstract 
`NereidsSpecifyInstances`. After removal, `NereidsSpecifyInstances` has no 
concrete implementations. This could indicate additional dead code to clean up 
in a follow-up, but is not a problem for this PR.
   
   ### Verification Summary
   
   | Category | Count | Status |
   |----------|-------|--------|
   | Deleted classes | 13 | All verified dead (zero references) |
   | Deleted public methods | 55 | All verified dead (zero callers) |
   | Deleted private methods | 21 | All verified dead (zero callers) |
   | Deleted fields | 10 | All verified dead (write-only or unreferenced) |
   | Serialization safety | All fields | No persistence/serialization impact |
   
   **Result**: No issues found. Clean dead code removal.


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