[Oracle] dbms_metadata.get_ddl的用法总结

dbms_metadata.get_ddl()用于获取对象的DDL，其具体用法如下。

注意：在sqlplus里，为了更好的展示DDL，需要设置如下参数：

[sql] 
set line 200  
set pagesize 0  
set long 99999  
set feedback off  
set echo off

1）获得表、索引、视图、存储过程、函数的DDL

[sql] 
select dbms_metadata.get_ddl('TABLE','TABLE_NAME','TABLE_OWNER') from dual;  
  
select dbms_metadata.get_ddl('INDEX','INDEX_NAME','INDEX_OWNER') from dual;  
  
select dbms_metadata.get_ddl('VIEW','VIEW_NAME','VIEW_OWNER') from dual;  
  
select dbms_metadata.get_ddl('PROCEDURE','PROCEDURE_NAME','PROCEDURE_OWNER') from dual;  
  
select dbms_metadata.get_ddl('FUNCTION','FUNCTION_NAME','FUNCTION_OWNER') from dual;

下面这个脚本用于获得某个schema下所有的表、索引、视图、存储过程、函数的DDL

[sql] 
set pagesize 0  
set long 90000  
set feedback off  
set echo off  
spool schema_ddl.sql  
SELECT DBMS_METADATA.GET_DDL('TABLE',u.table_name,u.owner) FROM DBA_TABLES u;  
SELECT DBMS_METADATA.GET_DDL('VIEW',u.view_name,u.owner) FROM DBA_VIEWS u;  
SELECT DBMS_METADATA.GET_DDL('INDEX',u.index_name,u.owner) FROM DBA_INDEXES u;  
select dbms_metadata.get_ddl('PROCEDURE',u.object_name, u.owner,) from dba_objects u where u.object_type = 'PROCEDURE';  
select dbms_metadata.get_ddl('FUNCTION',u.object_name, u.owner,) from dba_objects u where u.object_type = 'FUNCTION';  
spool off;

2）获得表空间的DDL

获得单个表空间的DDL:
[sql] 
select dbms_metadata.get_ddl('TABLESPACE','TBS_NAME') from dual;  

获得所有表空间的DDL:
[sql] 
SELECT DBMS_METADATA.GET_DDL('TABLESPACE', TS.tablespace_name)  
FROM DBA_TABLESPACES TS;

3）获得用户的DDL

获得单个用户的DDL：
[sql] 
select dbms_metadata.get_ddl('USER','EPAY_USER') from dual;  

获得所有用户的DDL：
[sql] 
SELECT DBMS_METADATA.GET_DDL('USER',U.username)   
FROM DBA_USERS U;