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MatViewNotifier

Struct MatViewNotifier 

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pub struct MatViewNotifier { /* private fields */ }
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이벤트 기반 Materialized View 알림 채널

DML 발생 시 notify_change(table) → dirty set에 추가 → Condvar 깨움 백그라운드 스레드가 즉시 깨어나 debounce 후 갱신 실행

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impl MatViewNotifier

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pub fn wait_and_take(&self) -> HashSet<String>

dirty set이 비어있으면 블로킹 대기, 채워지면 drain하여 반환

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pub fn take(&self) -> HashSet<String>

non-blocking: 현재 dirty set을 drain하여 반환 (비어있으면 빈 세트)

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