테이블 인덱스 - DBMS별 확인 방법
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Revision as of 23:20, 1 September 2022 by Dbeaver (talk | contribs) (새 문서: * 상위 문서: 테이블 인덱스 == PostgreSQL == === 인덱스 확인 === pg_indexes 테이블 활용<blockquote>SELECT * FROM pg_indexes WHERE tablename = 'mytable';</blockquote> === 인덱스 통계 확인 === pg_stat_user_indexes 테이블 활용<syntaxhighlight lang="sql" line="1"> 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...)
- 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;