PGSQL 获取数据库大小以及表达小等的SQL

SELECT d.datname AS Name, pg_catalog.pg_get_userbyid(d.datdba) AS Owner,
CASE WHEN pg_catalog.has_database_privilege(d.datname, 'CONNECT')
THEN pg_catalog.pg_size_pretty(pg_catalog.pg_database_size(d.datname))
ELSE 'No Access'
END AS SIZE
FROM pg_catalog.pg_database d
ORDER BY
CASE WHEN pg_catalog.has_database_privilege(d.datname, 'CONNECT')
THEN pg_catalog.pg_database_size(d.datname)
ELSE NULL
END DESC -- nulls first
LIMIT 20

　　

SELECT
table_schema || '.' || table_name AS table_full_name,
pg_size_pretty(pg_total_relation_size('"' || table_schema || '"."' || table_name || '"')) AS size
FROM information_schema.tables
ORDER BY
pg_total_relation_size('"' || table_schema || '"."' || table_name || '"') DESC

查看oid 以及表信息

select oid,relname from pg_class where UPPER(relname) like UPPER('%GSP%')

查看数据库schemas的oid

select oid,datname from pg_database

参考

https://blog.csdn.net/rocklee/article/details/51251174

https://wenku.baidu.com/view/b7fc105a2cc58bd63086bd31.html