在postgresql中 Drop table会不会释放磁盘空间，今日以实操来见证

–2019-01-11 09:49:21 drop table 会不会释放空间
create table tab_todrop(id int,cname varchar(50),remark text);
insert into tab_todrop select generate_series(1,10000000),’wx good boy’,md5(‘wx good boy’);
insert into tab_todrop select generate_series(1,10000000),’wx good boy’,md5(‘wx good boy’);
–查看表大小
qmstst=# select pg_size_pretty(pg_relation_size(‘tab_todrop’));
pg_size_pretty
—————-
2410 MB
(1 row)
qmstst=#