EXPLAIN
![](https://velog.velcdn.com/images/seonwook97/post/20c09361-cdf1-48f1-8cdf-9c0073b95a07/image.PNG)
EXPLAIN ANALYZE
EXPLAIN
: 쿼리 계획 구조 + 비용 추정
EXPLAIN ANALYZE
: 쿼리 계획 구조 + 비용 추정 + 실행 결과 통계
![](https://velog.velcdn.com/images/seonwook97/post/5e15d830-2af3-48e6-9729-b835f4f8e3d2/image.PNG)
Fragment structure
![](https://velog.velcdn.com/images/seonwook97/post/3df5f7d7-ef7b-4e05-ba0a-7d2717b6c9c5/image.PNG)
- Fragment 4: Fragment 상세정보
- Aggregate -> ScanFilterProject: 노드 계획 상세정보
Distribution
![](https://velog.velcdn.com/images/seonwook97/post/1fcfb2b1-3200-458a-a0d9-672e2b759117/image.PNG)
- hash partitioning
- 서버가 데이터를 배치할 파티션을 관리하여 파티션 간 균등한 분배를 보장
Row Layout
![](https://velog.velcdn.com/images/seonwook97/post/7594b4cd-ad0a-4b79-9b44-2b7fe319bc0d/image.PNG)
Estimates
![](https://velog.velcdn.com/images/seonwook97/post/6aff01d0-7fbb-498e-95c4-569cec4421fc/image.PNG)
Perfomance stats
![](https://velog.velcdn.com/images/seonwook97/post/0d60f730-3ba7-49b9-85bc-062e2c2b835f/image.PNG)
Exchanges
![](https://velog.velcdn.com/images/seonwook97/post/189633a6-4421-4fbb-b0e2-67a91df70aa4/image.PNG)
Reference