Oracle9i新特性-使用DBMS_METADATA包获得对象DDL语句

从Oracle9i开始Oracle提供了一个新的系统包DBMS_METADATA，可以用于提取对象创建的DDL语句。

这个Package功能极其强大，我们来看看它的使用方法.

1.获得表的创建语句.

SQL&gt; desc dbms_metadata
FUNCTION ADD_TRANSFORM RETURNS NUMBER
...
FUNCTION GET_DDL RETURNS CLOB
 Argument Name                  Type                    In/Out Default?
 ------------------------------ ----------------------- ------ --------
 OBJECT_TYPE                    VARCHAR2                IN
 NAME                           VARCHAR2                IN
 SCHEMA                         VARCHAR2                IN     DEFAULT
 VERSION                        VARCHAR2                IN     DEFAULT
 MODEL                          VARCHAR2                IN     DEFAULT
 TRANSFORM                      VARCHAR2                IN     DEFAULT
....



SQL&gt; set long 2000  

SQL&gt; select dbms_metadata.get_ddl('TABLE','TEST') from dual;





DBMS_METADATA.GET_DDL('TABLE','TEST')  

--------------------------------------------------------------------------------





  CREATE TABLE "SYS"."TEST"  

   (    "OWNER" VARCHAR2(30),  

        "OBJECT_NAME" VARCHAR2(128),  

        "SUBOBJECT_NAME" VARCHAR2(30),  

        "OBJECT_ID" NUMBER,  

        "DATA_OBJECT_ID" NUMBER,  

        "OBJECT_TYPE" VARCHAR2(18),  

        "CREATED" DATE,  

        "LAST_DDL_TIME" DATE,  

        "TIMESTAMP" VARCHAR2(19),  

        "STATUS" VARCHAR2(7),  

        "TEMPORARY" VARCHAR2(1),  

        "GENERATED" VARCHAR2(1),  

        "SECONDARY" VARCHAR2(1)  

   ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING  

  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645  

  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)  

  TABLESPACE "SYSTEM"





SQL&gt;