[postgres]유용한 쿼리

select * from pg_stat_activity;

- db 통계정보 보기

SELECT * FROM pg_stat_database;

- 테이블 통계정보 보기

select * from pg_stat_all_tables

- db사이즈 조회

select * from pg_size_pretty(pg_database_size('testDatabase'));

- tablespace size조회

select * from pg_size_pretty(pg_tablespace_size('pg_default'));

-현재 스키마 조회

select current_schema(); 

- table 목록 보기
postgresql: \d
postgresql: SELECT table_name FROM information_schema.tables WHERE table_schema = 'public';

- db목록 보기
postgresql: \l
postgresql: SELECT datname FROM pg_database;

- 컬럼 내용 보기
postgresql: \d table
postgresql: SELECT column_name FROM information_schema.columns WHERE table_name ='table';

- DESCRIBE TABLE
postgresql: \d+ table
postgresql: SELECT column_name FROM information_schema.columns WHERE table_name ='table'

- user 정보 보기

select * from pg_user where usename = CURRENT_USER;

- 현재 유저 정보 보기

select CURRENT_USER;

-function 내용보기

SELECT prosrc FROM pg_proc WHERE proname = 'partitioning_trigger_login';

-index 조회하기

Colored By Color Scripter™

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SELECT i.relname as indname,        i.relowner as indowner,        idx.indrelid::regclass,        am.amname as indam,        idx.indkey,        ARRAY(        SELECT pg_get_indexdef(idx.indexrelid, k + 1, true)        FROM generate_subscripts(idx.indkey, 1) as k        ORDER BY k        ) as indkey_names,        idx.indexprs IS NOT NULL as indexprs,        idx.indpred IS NOT NULL as indpred FROM   pg_index as idx JOIN   pg_class as i ON     i.oid = idx.indexrelid JOIN   pg_am as am ON     i.relam = am.oid and i.relname not like 'pg%';

-컴마 붙이기

 select to_char(123456789, 'FM999,999,990'); 

-index table space 변경

ALTER INDEX tb_ham_log_login_2013_11_first_idx1 SET TABLESPACE tbs_ham