[22기_변호영] 성능최적화 미션 제출합니다. #63
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danaggero
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Nov 17, 2025
| public void applyCoupon(...) { | ||
| couponRepository.save(...); // 여기서 예외 → 이 부분만 롤백 | ||
| } | ||
| ``` |
| - 인덱스 내부에서는 정의된 column 순서대로 정렬 | ||
| - 여러 column을 동시에 검색하거나 조건으로 사용할 때 유용함 | ||
| - 인덱스 커버링 가능 (쿼리가 사용하는 column이 모두 compostie index에 포함될 경우 테이블 데이터를 보지 않고 인덱스 차원에서 결과 반환 가능) | ||
| - 인덱스 크기가 커질 수 있고, 순서에 따라 활용도가 달라질 수 있음 |
|
예시 코드와 함께 언제 주로 사용되는지 상세하게 적어주셔서 이해하기 쉬웠습니다. |
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저희집 고양이의 급작스러운 수술 이슈로 쿼리 최적화가 완료되지 못했는데요, 다음주 세션 전까지 최대한 마무리하겠습니다.. ㅠㅠ