Datbase : HINT #35
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Datbase : HINT #35
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YoonBaek
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Jun 22, 2022
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| 옵티마이저는 SQL을 가장 빠르고 효율적으로 수행할 최적의 처리경로를 생성해 주는 DBMS 내부의 핵심 엔진이다. 사용자가 구조화된 질의어(SQL)로 결과 집합을 요구하면, 이를 생성하는데 필요한 처리경로는 DBMS에 내장된 옵티마이저가 자동으로 생성해준다. 옵티마이저가 생성한 SQL 처리경로를 실행계획(Execution Plan)이라고 한다. 옵티마이저는 크게 비용기반과 규칙기반으로 나누어 진다. | ||
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쿼리를 날릴 때마다 옵티마이저가 도르마무를 하는 건지 궁금합니다!
0xe82de
approved these changes
Jun 22, 2022
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