테이블 인덱스 - DBMS별 확인 방법
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- 상위 문서: 테이블 인덱스
PostgreSQL[edit | edit source]
인덱스 확인[edit | edit source]
pg_indexes 테이블 활용
SELECT * FROM pg_indexes WHERE tablename = 'mytable';
인덱스 통계 확인[edit | edit source]
pg_stat_user_indexes 테이블 활용
SELECT
schemaname AS schema_name,
relname AS table_name,
indexrelname AS index_name,
pg_size_pretty(pg_relation_size(indexrelid::regclass)) AS index_size,
idx_scan,
idx_tup_read,
idx_tup_fetch
FROM pg_stat_user_indexes
ORDER BY idx_scan ASC;
인덱스를 타는지 확인[edit | edit source]
EXPLAIN ANALYZE
SELECT * FROM post WHERE test = 'test123';
MySQL[edit | edit source]
SHOW INDEX FROM mytable;