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Oracle DBMS_REDEFINITION Version 10.2

原创 Linux操作系统 作者:tolywang 时间:2007-06-22 00:00:00 0 删除 编辑
General
Note: DBMS_REDEFINITION is used to redefine table columns and column names. Tables that can not be redefined are:
  • Tables that have materialized views and materialized view logs defined on them cannot be redefined online
  • Tables that are materialized view container tables and AQ tables cannot be redefined online.
  • The overflow table of an IOT table cannot be redefined online.

Source{ORACLE_HOME}/rdbms/admin/dbmshord.sql
First Available9.0.1
Constants
NameData TypeValue
cons_constraintPLS_INTEGER3
cons_indexPLS_INTEGER2
cons_orig_parmsPLS_INTEGER1
cons_triggerPLS_INTEGER4
cons_use_pkPLS_INTEGER1
cons_use_rowidPLS_INTEGER2
Dependent Objects
CCOL$DBA_TRIGGERSICOL$
CDEF$DBA_USERSIND$
COL$DBMS_IJOBKU$_DDL
CON$DBMS_METADATAKU$_DDLS
DBA_CONSTRAINTSDBMS_SNAPSHOT_LIBOBJ$
DBA_CONS_COLUMNSDBMS_SNAP_INTERNALPLITBLM
DBA_INDEXESDBMS_STANDARDREDEF_DEP_ERROR$
DBA_IND_COLUMNSDBMS_SYS_ERRORREDEF_OBJECT$
DBA_LOG_GROUPSEMD_LOADERSYS
DBA_REDEFINITION_OBJECTSUSER$
Exceptions
Error CodeReason
ORA-01408Such column list already indexed
ORA-12087An attempt was made to online redefine a table owned by SYS or SYSTEM
ORA-12088An attempt was made to online redefine a table containing a LONG column, an ADT column, or a FILE column.
ORA-12089An attempt was made to online redefine a table that does not have a primary key defined on it.
ORA-12090An attempt was made to online redefine a table that is either a clustered table, AQ table, temporary table, IOT overflow table or table with FGA/RLS enabled.
ORA-12091An attempt was made to online redefine a table that had materialized views defined on it or had a materialized view log defined on it or is a master.
ORA-12092An attempt was made to online redefine a table that is either a materialized view or a replicated table.
ORA-12093The table is not the interim table of the corresponding table to be online redefined.
ORA-12094Error during online redefinition.
ORA-32330Invalid operation on online redefinition interim table "string"."string".
Security ModelExecute is granted to execute_catalog_role

The following privileges must be granted to the user:
ALTER ANY TABLE
CREATE ANY TABLE
DROP ANY TABLE
LOCK ANY TABLE
SELECT ANY TABLE

The following privileges may be required too:
CREATE ANY INDEX
CREATE ANY TRIGGER
ABORT_REDEF_TABLE
Cleans Up Errors From The Redefinition Processdbms_redefinition.abort_redef_table(
uname IN VARCHAR2,
orig_table IN VARCHAR2,
int_table IN VARCHAR2,
part_name IN VARCHAR2 := NULL);
See demo: below.
CAN_REDEF_TABLE
Determines if a given table can be redefined onlinedbms_redefinition.can_redef_table(
uname IN VARCHAR2,
tname IN VARCHAR2,
options_flag IN BINARY_INTEGER := 1
part_name IN VARCHAR2 := NULL);

-- see constants above
See demo: below.
COPY_TABLE_DEPENDENTS
Copies the dependant objects of the original table to the interim tabledbms_redefinition.copy_table_dependents(
uname IN VARCHAR2,
orig_table IN VARCHAR2,
int_table IN VARCHAR2,
copy_indexes IN PLS_INTEGER := 1,
copy_triggers IN BOOLEAN := TRUE,
copy_constraints IN BOOLEAN := TRUE,
copy_privileges IN BOOLEAN := TRUE,
ignore_errors IN BOOLEAN := FALSE,
num_errors OUT PLS_INTEGER,
copy_statistics IN BOOLEAN := FALSE);
See demo: below.
FINISH_REDEF_TABLE
Registers a dependent object (index, trigger or constraint)dbms_redefinition.finish_redef_table(
uname IN VARCHAR2,
orig_table IN VARCHAR2,
int_table IN VARCHAR2,
part_name IN VARCHAR2 := NULL);
See demo: below.
REGISTER_DEPENDENT_OBJECT
Completes The Redefinition Processdbms_redefinition.register_dependent_object(
uname IN VARCHAR2, -- schema name
orig_table IN VARCHAR2, -- table to redefine
int_table IN VARCHAR2, -- interim table
dep_type IN PLS_INTEGER, -- type of dependent object
dep_owner IN VARCHAR2, -- owner of dependent object
dep_orig_name IN VARCHAR2, -- name of orig dependent object
dep_int_name IN VARCHAR2); -- name of interim dependent obj.
See demo: below.
START_REDEF_TABLE
Starts The Redefinition Processdbms_redefinition.start_redef_table(
uname IN VARCHAR2, -- schema name
orig_table IN VARCHAR2, -- table to redefine
int_table IN VARCHAR2, -- interim table
col_mapping IN VARCHAR2 := NULL, -- column mapping
options_flag IN BINARY_INTEGER := 1, -- redefinition type
orderby_cols IN VARCHAR2 := NULL, -- col list & ASC/DESC
part_name IN VARCHAR2 := NULL);
See demo: below.
SYNC_INTERIM_TABLE
Maintains Synchronization Between The Original And Interim Tabledbms_redefinition.sync_interim_table(
uname IN VARCHAR2, -- schema name
orig_table IN VARCHAR2, -- original table
int_table IN VARCHAR2, -- interim table
part_name IN VARCHAR2 := NULL);
See demo: below.
UNREGISTER_DEPENDENT_OBJECT
Unregisters a dependent objectdbms_redefinition.unregister_dependent_object(
uname IN VARCHAR2,
orig_table IN VARCHAR2,
int_table IN VARCHAR2,
dep_type IN PLS_INTEGER,
dep_owner IN VARCHAR2,
dep_orig_name IN VARCHAR2,
dep_int_name IN VARCHAR2);
exec dbms_redefinition.unregister_dependent_object('UWCLASS', 'EMP', 'INT_EMP', dbms_redefinition.cons_trigger, 'UWCLASS', 'bu1_hiredate', 'bu2_hiredate');
DBMS_REDEFINITION Demo
System Privileges Required To Run DemoGRANT create session TO uwclass;
GRANT create materialized view TO uwclass;
GRANT create table TO uwclass;
GRANT create trigger TO uwclass;
GRANT create view TO uwclass;

GRANT execute ON dbms_redefinition TO uwclass;
GRANT alter any table TO uwclass;
GRANT create any table TO uwclass;
GRANT drop any table TO uwclass;
GRANT lock any table TO uwclass;
GRANT select any table TO uwclass;

Demo Tables
CREATE TABLE dept (
deptno NUMBER(2),
dname VARCHAR2(14),
loc VARCHAR2(13));

ALTER TABLE dept
ADD CONSTRAINT pk_dept
PRIMARY KEY (deptno);

CREATE TABLE emp (
empno NUMBER(15),
ename VARCHAR2(10),
job VARCHAR2(9),
mgr NUMBER(4),
hiredate DATE,
sal NUMBER(7,2),
comm NUMBER(7,2),
deptno NUMBER(2));

ALTER TABLE emp
ADD CONSTRAINT pk_emp
PRIMARY KEY (empno);

ALTER TABLE emp
ADD CONSTRAINT fk_emp_dept_no
FOREIGN KEY (deptno)
REFERENCES dept(deptno);

ALTER TABLE emp
ADD CONSTRAINT cc_emp_sal_range
CHECK (deptno BETWEEN 1 AND 100);

CREATE TABLE int_emp (
empno NUMBER(15),
name VARCHAR(100),
salary NUMBER,
hiredate DATE,
deptno NUMBER DEFAULT 10);

Demo Data
INSERT INTO dept VALUES (10,'ACCOUNTING','NEW YORK');
INSERT INTO dept VALUES (20,'RESEARCH','DALLAS');
INSERT INTO dept VALUES (30,'SALES','CHICAGO');
INSERT INTO dept VALUES (40,'OPERATIONS','BOSTON');

INSERT INTO emp VALUES
(7369,'SMITH','CLERK',7902, TO_DATE('17-DEC-04'),800,NULL,20);
INSERT INTO emp VALUES
(7499,'ALLEN','SALES',7698, TO_DATE('20-FEB-05'),1600,300,30);
INSERT INTO emp VALUES
(7521,'WARD','SALES',7698, TO_DATE('22-FEB-03'),1250,500,30);
INSERT INTO emp VALUES
(7566,'JONES','MANAGER',7839, TO_DATE('02-APR-04'),2975,NULL,20);
INSERT INTO emp VALUES
(7654,'MARTIN','SALES',7698, TO_DATE('28-SEP-00'),1250,1400,30);
INSERT INTO emp VALUES
(7698,'BLAKE','MANAGER',7839, TO_DATE('01-MAY-01'),2850,NULL,30);
INSERT INTO emp VALUES
(7782,'CLARK','MANAGER',7839, TO_DATE('09-JUN-02'),2450,NULL,10);
INSERT INTO emp VALUES
(7788,'HESS','ANALYST',7566, TO_DATE('13-JUL-03')-85,3000,NULL,20);
INSERT INTO emp VALUES
(7839,'KING','PRESIDENT',NULL, TO_DATE('17-NOV-99'),5000,0,10);
INSERT INTO emp VALUES
(7844,'TURNER','SALES',7698, TO_DATE('08-SEP-01'),1500,0,30);
INSERT INTO emp VALUES
(7876,'ADAMS','CLERK',7788, TO_DATE('13-JUL-02')-51,1100,NULL,20);
INSERT INTO emp VALUES
(7900,'JAMES','CLERK',7698, TO_DATE('03-DEC-01'),950,NULL,30);
INSERT INTO emp VALUES
(7902,'FORD','ANALYST',7566, TO_DATE('03-DEC-03'),3000,NULL,20);
INSERT INTO emp VALUES
(7934,'MILLER','CLERK',7782, TO_DATE('23-JAN-05'),1300,NULL,10);

COMMIT;
Demo TriggerCREATE OR REPLACE TRIGGER bu1_hiredate
BEFORE UPDATE OF hiredate ON emp
FOR EACH ROW

BEGIN
:NEW.hiredate := SYSDATE;
END bu1_hiredate;
/

CREATE OR REPLACE TRIGGER bu2_hiredate
BEFORE UPDATE OF hiredate ON int_emp
FOR EACH ROW

BEGIN
:NEW.hiredate := SYSDATE+10;
END bu2_hiredate;
/

Redefine Emp
SELECT COUNT(*)
FROM emp;

SELECT COUNT(*)
FROM int_emp;

SELECT table_name
FROM user_tables;

exec dbms_redefinition.start_redef_table('UWCLASS', 'EMP', 'INT_EMP', 'EMPNO EMPNO, ENAME NAME, SAL*1.10 SALARY, HIREDATE HIREDATE');

SELECT table_name
FROM user_tables;

SELECT name
FROM user_snapshots;

desc mlog$_emp

desc rupd$_emp

exec dbms_redefinition.abort_redef_table('UWCLASS', 'EMP','INT_EMP');

SELECT table_name
FROM user_tables;
/*
If the table is not a candidate for online redefinition, an error
message is raised
*/

exec dbms_redefinition.can_redef_table('UWCLASS','EMP', dbms_redefinition.cons_use_pk);

exec dbms_redefinition.start_redef_table('UWCLASS', 'EMP', 'INT_EMP', 'EMPNO EMPNO, ENAME NAME, SAL*1.10 SALARY, HIREDATE HIREDATE, DEPTNO DEPTNO');

exec dbms_redefinition.register_dependent_object('UWCLASS', 'EMP', 'INT_EMP', dbms_redefinition.cons_trigger, 'UWCLASS', 'bu1_hiredate', 'bu2_hiredate');

-- ALTER TABLE int_emp DISABLE CONSTRAINT fk_emp_dept;
DECLARE
retval NUMBER(5);
BEGIN
dbms_redefinition.copy_table_dependents('UWCLASS', 'EMP', 'INT_EMP', 0, copy_constraints=>TRUE, num_errors=>retval);

dbms_output.put_line(retval);
END;
/

exec dbms_redefinition.sync_interim_table('UWCLASS', 'EMP', 'INT_EMP');
-- the insert to show how DML issued while
-- redefinition is in progress is handled
INSERT INTO emp VALUES
(9999,'MORGAN','IT',7839,TO_DATE('01-JAN-2005'),2950,NULL,10);
COMMIT;

exec dbms_redefinition.finish_redef_table('UWCLASS', 'EMP', 'INT_EMP');

desc emp

desc int_emp

SELECT COUNT(*) FROM emp;

SELECT COUNT(*) FROM int_emp;

SELECT new.salary, old.sal
FROM emp new, int_emp old
WHERE new.empno = old.empno;

SELECT table_name, trigger_name
FROM user_triggers;

SELECT trigger_body from user_triggers
WHERE table_name = 'EMP';

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