Oracle DBMS_METADATA 用法例子

rom：http://www.psoug.org/reference/dbms_metadata.html
General Information
Source
{ORACLE_HOME}/rdbms/admin/dbmsmeta.sql
First Available
9.0.1
几个常用过程或函数：
GET_DDL
Fetch DDL for objects
dbms_metadata.get_ddl(
object_type IN VARCHAR2,
name        IN VARCHAR2,
schema      IN VARCHAR2 DEFAULT NULL,
version     IN VARCHAR2 DEFAULT 'COMPATIBLE',
model     IN VARCHAR2 DEFAULT 'ORACLE',
transform   IN VARCHAR2 DEFAULT 'DDL')
RETURN CLOB;
Table
CREATE TABLE test
PCTFREE 0
TABLESPACE uwdata AS
SELECT table_name, tablespace_name
from user_tables;
SET LONG 10000
SELECT dbms_metadata.get_ddl('TABLE', 'TEST')
from dual;
View
CREATE OR REPLACE VIEW my_tables AS
select table_name, tablespace_name
from user_tables;
SELECT dbms_metadata.get_ddl('VIEW', 'MY_TABLES')
from dual;
Function
CREATE OR REPLACE FUNCTION whoami RETURN VARCHAR2 IS
BEGIN
   RETURN user;
END whoami;
/
SELECT dbms_metadata.get_ddl('FUNCTION', 'WHOAMI')
from dual;
Tablespace
SELECT dbms_metadata.get_ddl('TABLESPACE', 'UWDATA')
from dual;
GET_DEPENDENT_DDL
Fetch DDL for dependent objects (audits, object grants)
dbms_metadata.get_dependent_ddl(
object_type        IN VARCHAR2,
base_object_name   IN VARCHAR2,
base_object_schema IN VARCHAR2 DEFAULT NULL,
version            IN VARCHAR2 DEFAULT 'COMPATIBLE',
model              IN VARCHAR2 DEFAULT 'ORACLE',
transform          IN VARCHAR2 DEFAULT 'DDL',
object_count       IN NUMBER   DEFAULT 10000)
RETURN CLOB;
GRANT select ON servers TO hr;
GRANT select ON servers TO scott;
set long 100000
SELECT dbms_metadata.get_dependent_ddl('OBJECT_GRANT','SERV