postgresql中表与文件的对应关系详解
postgres=# create table tab_lei (c1 int);
create table
postgres=#
postgres=# \x
expanded display is on.
postgres=# select relname,relfilenode from pg_class where relname='tab_lei';
-[ record 1 ]--------
relname | tab_lei
relfilenode | 49414
postgres=# select oid,datname from pg_database where datname='postgres';
-[ record 1 ]-----
oid | 13212
datname | postgres
postgres=# insert into tab_lei values(111);
insert 0 1
postgres=#
postgres=# select pg_relation_filepath('tab_lei');
pg_relation_filepath
----------------------
base/13212/49414
(1 row)
postgres=#
postgres=# \q
[postgres@pgserver data]$ cd $pgdata/base
[postgres@pgserver base]$ pwd
/usr/local/pgsql/data/base
[postgres@pgserver base]$ ls
1 13211 13212 16384 24838
[postgres@pgserver base]$ cd 13212
[postgres@pgserver 13212]$ ls -lrt |grep 49414
-rw------- 1 postgres postgres 8192 mar 13 16:38 49414