sqlite_linq: _distinct_by composition + reverse() MAX(pk) + group_by+first projection - #2909

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borisbat merged 9 commits into

bbatkin/sqlite-linq-distinct-by-composition

May 28, 2026

Commits on May 28, 2026

sqlite_linq: passthrough finalize for `_distinct_by(K)` row chains

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tests: Arm A — _distinct_by(K) row passthrough + composition

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sqlite_linq: Arm B — recognize `reverse() |> _distinct_by(K)` (MAX(pk))

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sqlite_linq: Arm C — `_group_by(K) |> _select((K=_._0, R=_._1|>first()))`

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bench/sql: backfill m1 SQL lanes for 4 closed gap cells

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docs/tutorial: sql_12_distinct — composition + reverse + groupby-first

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docs/bench: refresh results.md + sqlite_linq_gaps.md + API_REWORK chunk N+1

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docs: concretize PR# placeholder in sqlite_linq_gaps.md (#2909)

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Address Copilot R1: reject pre-distinct phase-divert + row-entry as inner subquery

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