Creating a Mat View having the same name with that of the table name

Question

Hi everyone,
After dropping the mat view name "QQ.TRDLN_DIM_MV", I'm trying to re-create it by having the same name as that of the table but I got an error stating that "name is already used by an existing object". How can create a mat view to look like the object owned by schema "GQ", having a name that is the same as that of the table name, without dropping the table?
OWNER_O OBJECT_TYPE CREATED LAST_DDL_ TIMESTAMP STATUS OBJECT_NAME
===
GQ MATERIALIZED VIEW 05-NOV-08 13-DEC-08 2008-11-05:06:31:46 VALID TRDLN_DIM_MV
GQ TABLE 05-NOV-08 15-DEC-08 2008-11-05:06:31:00 VALID TRDLN_DIM_MV
QQ TABLE 17-AUG-07 16-MAR-09 2007-08-17:17:05:21 VALID TRDLN_DIM_MV
SQL>CREATE MATERIALIZED VIEW QQ.TRDLN_DIM_MV
2 TABLESPACE FPLC01S
3 NOCACHE
4 NOLOGGING
5 COMPRESS
6 PARALLEL ( DEGREE 2 INSTANCES 1 )
7 BUILD IMMEDIATE
8 REFRESH FORCE ON DEMAND
9 WITH PRIMARY KEY
10 AS
11 select /*+ NO_REWRITE */ trdln_id,
12 trdln_skid,
13 trdln_end_date,
14 first_value(trdln_end_date) over (partition by trdln_id order by trdln_end_date DESC) as MaxDate
15 from QQ.trdln_dim;
from QQ.trdln_dim
ERROR at line 15:
ORA-00955: name is already used by an existing object
I appreciate your help. Many thanks in advance!
Regards,
Radic

Answer 1

You'd have to rename the table (using ALTER TABLE tablename RENAME TO othername; ) before you create the MV.
You can't have both existing with the same name in the same schema.
What you see in the GQ schema is that the "table" is the underlying table for the Materialized View.
When you do a CREATE MATERIALIZED VIEW MY_MV AS ...
Oracle creates two objects with the same name, one being the Materialized View MY_MV and the other being the table MY_MV which is the physical storage. {Remember that a Materialized View is a means of getting a physical representation of a View}.
In the QQ schema what you have is either
a. a real Table
or
b. an improperly dropped MV, resulting in the underlying Table still present.