{
  "date": "2026-10-20",
  "scope": "Hidden-rank retracting Top-N OFFSET row-kind persistence follows selected host state backend; correctness-only fix, no acceleration claim",
  "baseline": {
    "scalar_two_restore_controls": {
      "pass": 3,
      "fail": 1,
      "failure": "Rocks hidden OFFSET: stock 437 vs native 421 emitted rows"
    },
    "isolated_controls": {
      "pass": 6,
      "fail": 2,
      "failures": "Rocks hidden OFFSET, uninterrupted and two-restore"
    }
  },
  "released_sources": {
    "1.18.1": {
      "url": "https://repo.maven.apache.org/maven2/org/apache/flink/flink-table-runtime/1.18.1/flink-table-runtime-1.18.1-sources.jar",
      "sha256": "07d20618193742eed0d3e166e8ed4cfc10518c652f682b442d37d80315cdb35b",
      "path": "org/apache/flink/table/runtime/operators/rank/RetractableTopNFunction.java"
    },
    "2.2.1": {
      "url": "https://repo.maven.apache.org/maven2/org/apache/flink/flink-table-runtime/2.2.1/flink-table-runtime-2.2.1-sources.jar",
      "sha256": "6e453283568dceadf7ce4323170e8894b6895e107e08b5f89a201aba0a2b2277",
      "path": "org/apache/flink/table/runtime/operators/rank/RetractableTopNFunction.java"
    }
  },
  "candidate": {
    "sha256": "606e02b4ad071817d39ea19943dd71ddfa8828fb3341d35ff905b49cc56103c0",
    "build": "release + mimalloc; JDK17 for SQL"
  },
  "validation": {
    "flink_2.2.1": {
      "pass": 16,
      "fail": 0
    },
    "flink_1.18.1": {
      "pass": 16,
      "fail": 0
    },
    "matrix": [
      "heap/RocksDB",
      "hidden/projected rank",
      "unique/tied sort keys",
      "uninterrupted/two failure-restores"
    ],
    "native_topn_tests": {
      "pass": 58,
      "fail": 0
    },
    "criterion_fixtures": 16,
    "strict_docs": true
  },
  "state_compatibility": "Byte layout unchanged. Preserve old recorded kinds; cannot infer the stock-RocksDB history lost under prior native heap-style mutation semantics."
}