dbms_metadata.get_ddl的用法

定義:

dbms_metadata包中的get_ddl函數

--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;

示例:

1.得到一個表或索引的ddl語句

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

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

2.得到一個使用者下的所有表，索引，存儲過程的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.得到所有表空間的ddl語句

SELECT DBMS_METADATA.GET_DDL('TABLESPACE', TS.tablespace_name)

FROM DBA_TABLESPACES TS;

4.得到所有建立使用者的ddl

SELECT DBMS_METADATA.GET_DDL('USER',U.username)

FROM DBA_USERS U;

案例:

利用DBMS_METADATA.GET_DDL包得到資料庫的對象的ddl腳本。如下（SQLPLUS中執行）：

a. 擷取單個的建表、視圖和建索引的文法

set pagesize 0

set longc 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.擷取一個SCHEMA下的所有建表、視圖和建索引的文法，以scott為例：

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.    擷取某個SCHEMA的建全部存儲過程的文法

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.    擷取某個SCHEMA的建全部函數的文法

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;

---另附一個提取ROLE的腳本,割接ROLE非常友善------

點選(此處)折疊或打開

1. --ROLE_GETDDL.sql
2. --2014.12.13
3. set long 20000 longchunksize 20000 pagesize 0 linesize 1000 feedback off verify off trimspool on
4. column ddl format a1000
5. begin
6.    dbms_metadata.set_transform_param (dbms_metadata.session_transform, 'SQLTERMINATOR', true);
7.    dbms_metadata.set_transform_param (dbms_metadata.session_transform, 'PRETTY', true);
8. end;
9. /
10. variable v_role VARCHAR2(30);
11. exec :v_role := upper('&1');
12. select dbms_metadata.get_ddl('ROLE', r.role) AS ddl
13. from dba_roles r
14. where r.role = :v_role
15. union all
16. select dbms_metadata.get_granted_ddl('ROLE_GRANT', rp.grantee) AS ddl
17. from dba_role_privs rp
18. where rp.grantee = :v_role
19. and rownum = 1
20. union all
21. select dbms_metadata.get_granted_ddl('SYSTEM_GRANT', sp.grantee) AS ddl
22. from dba_sys_privs sp
23. where sp.grantee = :v_role
24. and rownum = 1
25. union all
26. select dbms_metadata.get_granted_ddl('OBJECT_GRANT', tp.grantee) AS ddl
27. from dba_tab_privs tp
28. where tp.grantee = :v_role
29. and rownum = 1
30. /
31. set linesize 80 pagesize 14 feedback on verify on

來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/30264304/viewspace-1813614/，如需轉載，請注明出處，否則将追究法律責任。

轉載于:http://blog.itpub.net/30264304/viewspace-1813614/