A quick and dirty post. This also works for PDBs.
[oracle@ol7-112-dg1 ~]$ rman target /
Recovery Manager: Release 19.0.0.0.0 - Production on Wed Aug 25 12:40:16 2021
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to target database: HAWK (DBID=3331620895)
RMAN> report schema;
using target database control file instead of recovery catalog
Report of database schema for database with db_unique_name HAWK
List of Permanent Datafiles
===========================
File Size(MB) Tablespace RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
1 1040 SYSTEM YES /u01/oradata/hawk/system01.dbf
2 890 SYSAUX NO /u01/oradata/hawk/sysaux01.dbf
3 1025 UNDOTBS1 YES /u01/oradata/hawk/undotbs01.dbf
4 10 USERS NO /u01/oradata/hawk/users01.dbf
List of Temporary Files
=======================
File Size(MB) Tablespace Maxsize(MB) Tempfile Name
---- -------- -------------------- ----------- --------------------
1 37 TEMP 32767 /u01/oradata/hawk/temp01.dbf
RMAN> exit
Recovery Manager complete.
[oracle@ol7-112-dg1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 19.0.0.0.0 - Production on Wed Aug 25 12:40:44 2021
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle. All rights reserved.
Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0
SQL> alter tablespace users add datafile size 1m;
Tablespace altered.
SQL> exit
Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0
[oracle@ol7-112-dg1 ~]$ rman target /
Recovery Manager: Release 19.0.0.0.0 - Production on Wed Aug 25 12:41:23 2021
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to target database: HAWK (DBID=3331620895)
RMAN> report schema;
using target database control file instead of recovery catalog
Report of database schema for database with db_unique_name HAWK
List of Permanent Datafiles
===========================
File Size(MB) Tablespace RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
1 1040 SYSTEM YES /u01/oradata/hawk/system01.dbf
2 890 SYSAUX NO /u01/oradata/hawk/sysaux01.dbf
3 1025 UNDOTBS1 YES /u01/oradata/hawk/undotbs01.dbf
4 10 USERS NO /u01/oradata/hawk/users01.dbf
5 1 USERS NO /u01/oradata/HAWK/datafile/o1_mf_users_jldgmgxd_.dbf
List of Temporary Files
=======================
File Size(MB) Tablespace Maxsize(MB) Tempfile Name
---- -------- -------------------- ----------- --------------------
1 37 TEMP 32767 /u01/oradata/hawk/temp01.dbf
RMAN> exit
Recovery Manager complete.
[oracle@ol7-112-dg1 ~]$