Why this query does not show the result?

Question

Why the query with the schema prefixed does not show the result and the query without schema display the correct results?
SQL> select data_object_id,object_type from dba_objects where object_name='HR'.'JOBS';
select data_object_id,object_type from dba_objects where object_name='HR'.'JOBS'
ERROR at line 1:
ORA-00933: SQL command not properly ended
SQL> select data_object_id,object_type from dba_objects where object_name='HR.JOBS';
no rows selected
SQL> select data_object_id, OWNER, object_type from dba_objects where object_name='JOBS';
DATA_OBJECT_ID     OWNER                          OBJECT_TYPE
69662              HR                                 TABLE
                   OE                                 SYNONYM
SQL> SELECT USER FROM DUAL;
USER
SYS

Answer 1

Hi,
the column object_name refers to a object_name which is 'JOBS', the column owner refers to the owner 'HR', the value isn't stored together, so you have to select the two columns. It is the same behaviour as every other table/view. Have a look at the values in the view DBA_OBJECTS.
Herald ten Dam
Superconsult.nl