{ "date": "2026-11-04", "base": "0f5fc16796d6e7882e34722435480320a25434dd", "previous_head": "0acdd9b78f37061e1d82221524c035d64e04e4d0", "platform": "Apple M4 Pro, macOS arm64, one thread", "jdk": "17.0.12", "java_release": 11, "flink_versions": [ "1.18.1", "2.2.1" ], "build": "release --no-default-features --features mimalloc", "scope": "Pure native integer TRUNCATE at total runtime INT positions conservatively proven within -38..38 or NULL through genuine built-in GREATEST/LEAST and CASE. No general arithmetic bound assumptions, runtime rebuild, transport or switch change.", "method": { "rows_per_trial": 131072, "warmups": 16, "measurements": 9, "bulk_batch": 1024, "tiny_batch": 16, "input": "Equal prepared GenericRowData/BinaryRowData and Arrow; both NULL modes; signed integer extrema and BIGINT beyond 2^53; independently nullable INT position input. Wide clamps saturate at -38/38; negative clamps exercise -3/-1 rounding, not just zero and identity fast paths. Full SQL parity additionally walks all interior positions using id-2500.", "native_timer": "Starts/stops inside Rust after import and before export, retaining production Calc, output consumption, allocation, conversions and intrinsic callbacks. Initial JNI/import/export and perimeter transposes are outside this prepared operation only.", "previous": "Actual preceding encoder/helper from the recorded head runs identical fixture/data/JDK with frozen byte-identical DSO/executable. Candidate requires empty evaluators; previous requires the function evaluator. Stock is measured independently in both JVMs.", "pipeline": "Eight million-row bounded row-source to blackhole configurations, one thread, two warmups and five alternating stock/native measurements. Job submission/startup, JNI and both perimeter RowData/Arrow transposes retained. 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Epoch precision still admits only its separate 0/3/NULL proof.", "Wide clamps mostly exercise saturated endpoints in prepared controls; separate negative-clamp cells exercise nontrivial rounding. Functional SQL tests traverse all interior positions independently.", "All tiny controls, independent stock drift, variability and complete-job results are retained. Prepared bulk qualification is not universal full-job acceleration.", "Focused verification is distinct from full hosted suites, which must qualify the exact pushed head." ] }