{
  "schema_version": 1,
  "date": "2026-10-21",
  "feature": "Retracting two-phase SINGLE_VALUE scalar partials",
  "base_commit": "e0619752",
  "configuration": {
    "rows": 1000000,
    "type": "DOUBLE",
    "parallelism": 1,
    "inner_keys": 128,
    "outer_keys": 128,
    "backend": "memory",
    "heap": "2 GiB",
    "mini_batch_rows": 512,
    "mini_batch_latency": "1 h",
    "null_every": 7,
    "warmups": 2,
    "measured_trials": 3,
    "runtime": "JDK 17; release+mimalloc",
    "query": "SELECT k, SINGLE_VALUE(mx), COUNT(mx), AVG(mx), SUM(mx) FILTER (WHERE mx > 0) FROM (SELECT k, u, MAX(v) AS mx FROM src GROUP BY k, u) GROUP BY k",
    "boundary": "Runtime RowData source, both transposes, production JNI and state, two native local/global pairs, rowwise blackhole sink; startup/planning/execution retained"
  },
  "measurements": [
    {
      "flink_line": "2.2.1",
      "revision": "candidate",
      "dso_sha256": "6941f1ef5dc2add803d7d57bf58b197a0b6d4415185d5f056b3b000dc6811a0c",
      "native_aggregate_route": true,
      "trials": [
        {
          "engine": "Flink",
          "trial": 0,
          "warmup": true,
          "seconds": 1.372878917
        },
        {
          "engine": "StreamFusion",
          "trial": 0,
          "warmup": true,
          "seconds": 0.825443946
        },
        {
          "engine": "StreamFusion",
          "trial": 1,
          "warmup": true,
          "seconds": 0.500459386
        },
        {
          "engine": "Flink",
          "trial": 1,
          "warmup": true,
          "seconds": 0.686137967
        },
        {
          "engine": "Flink",
          "trial": 2,
          "warmup": false,
          "seconds": 0.541495434
        },
        {
          "engine": "StreamFusion",
          "trial": 2,
          "warmup": false,
          "seconds": 0.427232833
        },
        {
          "engine": "StreamFusion",
          "trial": 3,
          "warmup": false,
          "seconds": 0.381558713
        },
        {
          "engine": "Flink",
          "trial": 3,
          "warmup": false,
          "seconds": 0.551016248
        },
        {
          "engine": "Flink",
          "trial": 4,
          "warmup": false,
          "seconds": 0.539050737
        },
        {
          "engine": "StreamFusion",
          "trial": 4,
          "warmup": false,
          "seconds": 0.346559634
        }
      ],
      "measured_seconds": {
        "Flink": [
          0.541495434,
          0.551016248,
          0.539050737
        ],
        "StreamFusion": [
          0.427232833,
          0.381558713,
          0.346559634
        ]
      },
      "median_seconds": {
        "Flink": 0.541495434,
        "StreamFusion": 0.381558713
      },
      "stock_over_streamfusion": 1.4191667377806676
    },
    {
      "flink_line": "1.18.1",
      "revision": "candidate",
      "dso_sha256": "6941f1ef5dc2add803d7d57bf58b197a0b6d4415185d5f056b3b000dc6811a0c",
      "native_aggregate_route": true,
      "trials": [
        {
          "engine": "Flink",
          "trial": 0,
          "warmup": true,
          "seconds": 1.208621254
        },
        {
          "engine": "StreamFusion",
          "trial": 0,
          "warmup": true,
          "seconds": 0.759996259
        },
        {
          "engine": "StreamFusion",
          "trial": 1,
          "warmup": true,
          "seconds": 0.502395393
        },
        {
          "engine": "Flink",
          "trial": 1,
          "warmup": true,
          "seconds": 0.660836487
        },
        {
          "engine": "Flink",
          "trial": 2,
          "warmup": false,
          "seconds": 0.557253026
        },
        {
          "engine": "StreamFusion",
          "trial": 2,
          "warmup": false,
          "seconds": 0.440508433
        },
        {
          "engine": "StreamFusion",
          "trial": 3,
          "warmup": false,
          "seconds": 0.365738657
        },
        {
          "engine": "Flink",
          "trial": 3,
          "warmup": false,
          "seconds": 0.540568566
        },
        {
          "engine": "Flink",
          "trial": 4,
          "warmup": false,
          "seconds": 0.52263042
        },
        {
          "engine": "StreamFusion",
          "trial": 4,
          "warmup": false,
          "seconds": 0.366708114
        }
      ],
      "measured_seconds": {
        "Flink": [
          0.557253026,
          0.540568566,
          0.52263042
        ],
        "StreamFusion": [
          0.440508433,
          0.365738657,
          0.366708114
        ]
      },
      "median_seconds": {
        "Flink": 0.540568566,
        "StreamFusion": 0.366708114
      },
      "stock_over_streamfusion": 1.4741112764142439
    },
    {
      "flink_line": "2.2.1",
      "revision": "d13e9dc4",
      "dso_sha256": "c3c943f09fe9def73b6a86ce434da99e88c0b9e3c5f0bb8b4dcd4fb0dd36f2c4",
      "native_aggregate_route": false,
      "trials": [
        {
          "engine": "Flink",
          "trial": 0,
          "warmup": true,
          "seconds": 1.32864126
        },
        {
          "engine": "StreamFusion",
          "trial": 0,
          "warmup": true,
          "seconds": 0.681619501
        },
        {
          "engine": "StreamFusion",
          "trial": 1,
          "warmup": true,
          "seconds": 0.585051925
        },
        {
          "engine": "Flink",
          "trial": 1,
          "warmup": true,
          "seconds": 0.587359499
        },
        {
          "engine": "Flink",
          "trial": 2,
          "warmup": false,
          "seconds": 0.536053485
        },
        {
          "engine": "StreamFusion",
          "trial": 2,
          "warmup": false,
          "seconds": 0.551468375
        },
        {
          "engine": "StreamFusion",
          "trial": 3,
          "warmup": false,
          "seconds": 0.534627705
        },
        {
          "engine": "Flink",
          "trial": 3,
          "warmup": false,
          "seconds": 0.551671109
        },
        {
          "engine": "Flink",
          "trial": 4,
          "warmup": false,
          "seconds": 0.499944496
        },
        {
          "engine": "StreamFusion",
          "trial": 4,
          "warmup": false,
          "seconds": 0.533409599
        }
      ],
      "measured_seconds": {
        "Flink": [
          0.536053485,
          0.551671109,
          0.499944496
        ],
        "StreamFusion": [
          0.551468375,
          0.534627705,
          0.533409599
        ]
      },
      "median_seconds": {
        "Flink": 0.536053485,
        "StreamFusion": 0.534627705
      },
      "stock_over_streamfusion": 1.0026668651599342
    }
  ],
  "optimization_passes": 0,
  "validation": {
    "each_released_line": {
      "typed_raw_changelog_checks": 36,
      "interleaved_materialized_relation_checks": 2,
      "global_empty_result_checks": 2,
      "repeated_recovery_checks": 4,
      "types": [
        "BIGINT",
        "FLOAT",
        "DOUBLE",
        "DECIMAL(20,3)",
        "STRING",
        "DATE",
        "TIME(0)",
        "TIMESTAMP(9)",
        "BOOLEAN"
      ]
    },
    "cadence": "Raw changelogs use 15-row per-key cycles and logical bundle sizes 1/3. Recovery cuts at source prefixes 9/27 align both stages. Interleaved key order changes global count-trigger cadence, so its deterministic materialized multiset is checked separately; no runtime ordering claim is inferred.",
    "released_factory_audit": "Both released factories admit scalar SINGLE_VALUE types and reject binary/ARRAY/MAP/ROW; SQL removes DISTINCT and rejects FILTER. Existing 12 DISTINCT and 14 compact scalar checks per release retained.",
    "native_changes": "None: existing ordered value/signed INT count merge; this change widens planner admission.",
    "contracts": "Agent 50 passed, one skipped; Python execution contract checks 35 passed; declarations and exact scopes updated for unchanged AggregateITCase#testGroupBySingleValue. Actual upstream runtime/required CI pending consolidated validation."
  }
}