--1. Find the name of the datafile that you're going to migrate:

SQL> SELECT FILE_NAME, a.status FROM DBA_DATA_FILES a WHERE tablespace_name = 'TI_DBPETICAO';

--2. Take the tablespace offline:

SQL> alter tablespace TI_DBPETICAO offline;

--3. Copy the file using RMAN:

RMAN> COPY datafile '+DATA_ASM_DG/vs01/datafile/ti_dbpeticao.650.830703213' to '+DATA_ASM_DG/vs01/datafile/tidbpeticao01';

--4. Change datafile's name to the name displayed as output of the command above:    

SQL> ALTER DATABASE RENAME FILE '+DATA_ASM_DG/vs01/datafile/ti_dbpeticao.650.830703213' to '+DATA_ASM_DG/vs01/datafile/tidbpeticao01';

--5. Bring back the tablespace online:

SQL> alter tablespace TI_DBPETICAO online; -- 364

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