dbms_metadata.get_ddl的用法

–GET_DDL: Return the metadata for a single object as DDL.

— This interface is meant for casual browsing (e.g., from SQLPlus)

— vs. the programmatic OPEN / FETCH / CLOSE interfaces above.

— PARAMETERS:

— object_type – The type of object to be retrieved.

— name – Name of the object.

— schema – Schema containing the object. Defaults to

— the caller's schema.

— version – The version of the objects' metadata.

— model – The object model for the metadata.

— transform. – XSL-T transform. to be applied.

— RETURNS: Metadata for the object transformed to DDL as a CLOB.

FUNCTION 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;

1.得到一个表或索引的ddl语句

SELECT DBMS_METADATA.GET_DDL('TABLE','DEPT','SCOTT') FROM DUAL;

select dbms_metadata.get_ddl('INDEX','PK_DEPT','SCOTT') from dual;

2.得到一个用户下的所有表，索引，存储过程的ddl

SELECT DBMS_METADATA.GET_DDL(U.OBJECT_TYPE, u.object_name) FROM USER_OBJECTS u where U.OBJECT_TYPE IN ('TABLE','INDEX','PROCEDURE');

3.得到所有表空间的ddl语句

SELECT DBMS_METADATA.GET_DDL('TABLESPACE', TS.tablespace_name) FROM DBA_TABLESPACES TS;

4.得到所有创建用户的ddl

SELECT DBMS_METADATA.GET_DDL('USER',U.username) FROM DBA_USERS U;

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9i  中可以利用DBMS_METADATA.GET_DDL包得到数据库的对象的ddl脚本。如下（SQLPLUS中执行）：

a. 获取单个的建表、视图和建索引的语法

set pagesize 0

set long 90000

set feedback off

set echo off

spool DEPT.sql

select dbms_metadata.get_ddl('TABLE','TAB_NAME','SCOTT') from dual; 

select dbms_metadata.get_ddl('VIEW','VIEW_NAME','SCOTT') from dual; 

select dbms_metadata.get_ddl('INDEX','IDX_NAME','SCOTT') from dual;

spool off;

   

b.获取一个SCHEMA下的所有建表、视图和建索引的语法，以scott为例：

  

set pagesize 0

set long 90000

set feedback off

set echo off

spool schema.sql

connect scott/tiger;

SELECT DBMS_METADATA.GET_DDL('TABLE',u.table_name) FROM USER_TABLES u;

 SELECT DBMS_METADATA.GET_DDL('VIEW',u.VIEW_name) FROM USER_VIEWS u;

SELECT DBMS_METADATA.GET_DDL('INDEX',u.index_name) FROM USER_INDEXES u;

spool off;

c.    获取某个SCHEMA的建全部存储过程的语法

  

set pagesize 0

set long 90000

set feedback off

set echo off

spool procedures.sql  

select   DBMS_METADATA.GET_DDL('PROCEDURE',u.object_name) from     user_objects u where     object_type = 'PROCEDURE';

spool off;

d.    获取某个SCHEMA的建全部函数的语法

  

set pagesize 0

set long 90000

set feedback off

set echo off

spool function.sql  

select   DBMS_METADATA.GET_DDL('FUNCTION',u.object_name) from     user_objects u where     object_type = 'FUNCTION';

spool off;