{
  "date": "2026-10-20",
  "feature": "Default external Java MAP scalar callbacks through Flink-generated whole-Calc evaluation",
  "base_commit": "a0fe91e8a5583c6b531c56466b7954131825d520",
  "released_flink": [
    "2.2.1",
    "1.18.1"
  ],
  "java": "OpenJDK 17",
  "native_profile": "release",
  "native_library_sha256": "05889f15ede3c9a58e38c255cf91f302286b9f7fdad13aefc89007cc10eccb04",
  "production_change": "Java planner/type admission only. Existing generated expression evaluation, ownership and native bridge implementations are reused.",
  "admission": "Accepted UDF performance exception; no standalone speedup claimed and no new performance opt-in.",
  "coverage": {
    "map_shapes": [
      "STRING/INT",
      "INT/INT",
      "STRING/ARRAY<INT>",
      "STRING/ROW",
      "STRING/MAP",
      "BOOLEAN/DECIMAL38",
      "FLOAT/DOUBLE",
      "DATE/TIME",
      "DECIMAL38/TIMESTAMP9",
      "INTERVAL_MONTH/INTERVAL_SECOND3",
      "ROW/INT"
    ],
    "tests": "58 SQL/TableAPI,16 two-restore heap/Rocks p1/3,14 lifecycle/ownership/errors/guards,8 remote (4 MAP +4 existing ROW/binary),149 existing SQL regression checks per line. 245 pass2.2;236pass+9released-host skips1.18. Opt-out58both; collection flagfalse58native2.2.",
    "stock_fixture_corrections": "Nested TIME signature resolves TIME(0) while runtime milliseconds survive. Released interval SQL uses MONTH and SECOND(3) canonical units. The ROW field named raw requires quoting. Initial stock signature/parse failures were fixture errors, not excluded feature cases.",
    "still_guarded": [
      "Updating MAP retained payload equality/retractions (#437)",
      "Unverified computed collection results before state/exchange boundaries",
      "Custom type inference and internal MapData conversion",
      "Root ARRAY/MULTISET, DATE/TIME and fixed BINARY UDF signatures remain independent gaps"
    ]
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        4
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        64
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    "query": "SELECT id,map_identity(p) FROM src",
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        "width": 4,
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