{
  "schema_version": 1,
  "date": "2026-10-21",
  "feature": "Retracting decimal SUM and exact temporary SUM/AVG partial merging",
  "base_commit": "a86a333e",
  "configuration": {
    "rows": 1000000,
    "types": [
      "FLOAT",
      "DOUBLE",
      "DECIMAL(20,3)"
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    "parallelism": 1,
    "inner_keys": 128,
    "outer_keys": 16,
    "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_template": "SELECT u, SUM(mx), COUNT(mx), AVG(mx), SUM(mx) FILTER (WHERE mx > 0) FROM (SELECT k, u, MAX(CAST(v AS <type>)) AS mx FROM src GROUP BY k, u) GROUP BY u",
    "boundary": "Runtime RowData source, both transposes, JNI, temporary/persistent state, rowwise blackhole sink and complete job execution; planning/setup excluded. Timing runs alone."
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      "new_floating_raw_changelog_checks": 6,
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    "limitations": [
      "Only memory-state FLOAT/DOUBLE/DECIMAL(20,3) throughput is measured; decimal precision/scale 38 and RocksDB have correctness/recovery evidence.",
      "These are conversion-inclusive complete jobs, not isolated Rust/Arrow admission timings.",
      "Unchanged upstream runtime and required CI remain pending consolidation."
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}