oracle dbms_metadata 获取ddl语句
直接查询
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SQL> select dbms_metadata.get_ddl('TABLE','EMP','SCOTT') from dual; DBMS_METADATA.GET_DDL('TABLE','EMP','SCOTT') -------------------------------------------------------------------------------- CREATE TABLE "SCOTT"."EMP" ( "EMPNO" NUMBER(4,0), "ENAME" VARCHAR2(10), SQL> |
此时会发现使输出的结果不全，这是因为sqlplus 默认输出的lob长度为80，做如下设置后查询
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SQL> set pagesize 1000 SQL> set long 8000 SQL> select dbms_metadata.get_ddl('TABLE','EMP','SCOTT') from dual; DBMS_METADATA.GET_DDL('TABLE','EMP','SCOTT') --------------------------------------------------------------------------------
CREATE TABLE "SCOTT"."EMP" ( "EMPNO" NUMBER(4,0), "ENAME" VARCHAR2(10), "JOB" VARCHAR2(9), "MGR" NUMBER(4,0), "HIREDATE" DATE, "SAL" NUMBER(7,2), "COMM" NUMBER(7,2), "DEPTNO" NUMBER(2,0), CONSTRAINT "PK_EMP" PRIMARY KEY ("EMPNO") USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "USERS" ENABLE, CONSTRAINT "FK_DEPTNO" FOREIGN KEY ("DEPTNO") REFERENCES "SCOTT"."DEPT" ("DEPTNO") ENABLE ) 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 "USERS"
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此时可以发现表所有相关属性全部列出；
但是某些时候，并不需要显示的这么全，所以可以有选择性的进行格式化输出：
不显示存储属性等：
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SQL> execute dbms_metadata.set_transform_param(dbms_metadata.session_transform,'SEGMENT_ATTRIBUTES', false); PL/SQL procedure successfully completed. SQL> select dbms_metadata.get_ddl('TABLE','EMP','SCOTT') from dual; DBMS_METADATA.GET_DDL('TABLE','EMP','SCOTT') --------------------------------------------------------------------------------
CREATE TABLE "SCOTT"."EMP" ( "EMPNO" NUMBER(4,0), "ENAME" VARCHAR2(10), "JOB" VARCHAR2(9), "MGR" NUMBER(4,0), "HIREDATE" DATE, "SAL" NUMBER(7,2), "COMM" NUMBER(7,2), "DEPTNO" NUMBER(2,0), CONSTRAINT "PK_EMP" PRIMARY KEY ("EMPNO") ENABLE, CONSTRAINT "FK_DEPTNO" FOREIGN KEY ("DEPTNO") REFERENCES "SCOTT"."DEPT" ("DEPTNO") ENABLE ) |
格式化输出，不显示约束等：
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SQL> execute dbms_metadata.set_transform_param(dbms_metadata.session_transform,'CONSTRAINTS', FALSE) PL/SQL procedure successfully completed. SQL> execute dbms_metadata.set_transform_param(dbms_metadata.session_transform,'REF_CONSTRAINTS', FALSE) PL/SQL procedure successfully completed. SQL> execute dbms_metadata.set_transform_param(dbms_metadata.session_transform,'SQLTERMINATOR', TRUE) PL/SQL procedure successfully completed. SQL> select dbms_metadata.get_ddl('TABLE','EMP','SCOTT') from dual; DBMS_METADATA.GET_DDL('TABLE','EMP','SCOTT') -------------------------------------------------------------------------------- CREATE TABLE "SCOTT"."EMP" ( "EMPNO" NUMBER(4,0), "ENAME" VARCHAR2(10), "JOB" VARCHAR2(9), "MGR" NUMBER(4,0), "HIREDATE" DATE, "SAL" NUMBER(7,2), "COMM" NUMBER(7,2), "DEPTNO" NUMBER(2,0) ) ; SQL> |
最简单的方式:
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SQL> execute dbms_metadata.set_transform_param(dbms_metadata.session_transform,'PRETTY', FALSE) PL/SQL procedure successfully completed. SQL> select dbms_metadata.get_ddl('TABLE','EMP','SCOTT') from dual; DBMS_METADATA.GET_DDL('TABLE','EMP','SCOTT') -------------------------------------------------------------------------------- CREATE TABLE "SCOTT"."EMP" ("EMPNO" NUMBER(4,0), "ENAME" VARCHAR2(10), "JOB" V ARCHAR2(9), "MGR" NUMBER(4,0), "HIREDATE" DATE, "SAL" NUMBER(7,2), "COMM" NUMBER (7,2), "DEPTNO" NUMBER(2,0)) ; |
同时需要了解表所在用户拥有的权限，以便能够正常的使用表：
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SQL> SELECT DBMS_METADATA.GET_GRANTED_DDL('ROLE_GRANT','SCOTT') FROM DUAL;
DBMS_METADATA.GET_GRANTED_DDL('ROLE_GRANT','SCOTT') -------------------------------------------------------------------------------- GRANT "CONNECT" TO "SCOTT"; GRANT "RESOURCE" TO "SCOTT"; SQL> |
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