Regarding table redefinition

Question

HI ALL,
Is it possible to redefine table without primary key on table? because i m doing redefinition the table but it is not possible to create primary key on table and i m creating partition on that table
How it is possible without primary key to redefine it?
is it possible?
Thanks in advance

Answer 1

hello,
So you are trying to redefine a table which has a primary key into partitioned table without a primary key, is that correct or I misunderstood you? If yes, then it's possible.
Here is an test example, i am using a table with a primary key and redefining into partitioned table, see if it helps you anyway and answers your question or not.
CREATE TABLE my_object (
   owner VARCHAR2 (30 BYTE) NOT NULL,
   object_type VARCHAR2 (19 BYTE) NULL
LOGGING;
-- OR
CREATE TABLE my_object
AS
   SELECT DISTINCT owner, object_type
   FROM all_objects;
ALTER TABLE my_object_ ADD (
  CONSTRAINT my_object_pk
PRIMARY KEY
(owner, object_type));
-- INTERIM PARTITIONED TABLE with no primary key
CREATE TABLE MY_OBJECT_INTERIM
  OWNER        VARCHAR2(30 BYTE)                       NULL,
  OBJECT_TYPE  VARCHAR2(50 BYTE)                    NULL,
  OBJECT_NAME  VARCHAR2(100 BYTE)                  NULL,
  CREATE_DATE  DATE                             DEFAULT SYSDATE                   NULL
PARTITION BY RANGE (CREATE_DATE)
  PARTITION MY_TEST_PARTITION VALUES LESS THAN (MAXVALUE)
    LOGGING
    NOCOMPRESS
);Now when copying dependent objects your can choose 0 for no indexes and FALSE for constraints.
DECLARE
   num_errors   NUMBER;
BEGIN
   DBMS_REDEFINITION.can_redef_table ('SCHEMA_NAME',
                                      'MY_OBJECT',
                                      DBMS_REDEFINITION.cons_use_pk,
                                      NULL
   DBMS_REDEFINITION.start_redef_table ('SCHEMA_NAME',
                                        'MY_OBJECT',
                                        'MY_OBJECT_INTERIM',
                                        NULL,
                                        DBMS_REDEFINITION.cons_use_pk,
                                        NULL,
                                        NULL
   DBMS_REDEFINITION.copy_table_dependents ('SCHEMA_NAME',
                                            'MY_OBJECT',
                                            'MY_OBJECT_INTERIM',
                                            0, --> indexes
                                            TRUE,
                                            FALSE, --> constraints
                                            TRUE,
                                            FALSE,
                                            num_errors,
                                            FALSE
   DBMS_OUTPUT.put_line('ERRORS OCCURED WHEN COPYING DEPENEDENTS OBJECTS '
                        || num_errors);
   DBMS_REDEFINITION.finish_redef_table ('SCHEMA_NAME',
                                         'MY_OBJECT',
                                         'MY_OBJECT_INTERIM',
                                         NULL
END;Regards