檢視oracle的DDL語句
使用dbms_metadata.get_ddl遇到ORA-31603
建了一個外部表,想看看這個表的資訊,一查就報錯了:
SQL> select dbms_metadata.get_ddl('TABLE','ext_case1') from dual;
ERROR:
ORA-31603: object "ext_case1" of type TABLE not found in schema "SCOTT"
ORA-06512: at "SYS.DBMS_METADATA", line 1546
ORA-06512: at "SYS.DBMS_METADATA", line 1583
ORA-06512: at "SYS.DBMS_METADATA", line 1901
ORA-06512: at "SYS.DBMS_METADATA", line 2792
ORA-06512: at "SYS.DBMS_METADATA", line 4333
ORA-06512: at line 1
no rows selected
看看錶時候存在,表確實是存在的:
SQL> select * from ext_case1;
ENAME JOB SAL
---------- -------------------- ----------
SMITH CLEAK 3904
ALLEN SALESMAN 2891
WARD SALESMAN 3128
KING PRESIDENT 2523
SQL>
鬱悶了,換sysdba使用者試了一下,錯誤依然,有檢查了一遍,還是不知道錯誤在那裡,不想弄了,也不想看書了,下去買了瓶水,回來又試了一把,還是錯誤。
不解決不死心,google一把,悲劇了,google又間歇性的癱瘓了,無奈baidu,找到一個答案說是使用者沒有查詢許可權。
給scott賦許可權:
SQL> grant select_catalog_role to scott;
Grant succeeded.
SQL>
再查詢還是不行,唉。。。開啟google,google正常工作了。又找到一個答案,說是get_ddl裡的引數都要大寫。
SQL> select dbms_metadata.get_ddl('TABLE','EXT_CASE1') from dual;
DBMS_METADATA.GET_DDL('TABLE','EXT_CASE1')
--------------------------------------------------------------------------------
CREATE TABLE "SCOTT"."EXT_CASE1"
("ENAME" VARCHAR2(10),
"JOB" VARCHAR2
SQL>
輸出的資訊好像沒有顯示全,要設定一下sqlplus的long的設定來改變顯示的長度,預設的long是80:
SQL> set long 2000
SQL> select dbms_metadata.get_ddl('TABLE','EXT_CASE1') from dual;
DBMS_METADATA.GET_DDL('TABLE','EXT_CASE1')
--------------------------------------------------------------------------------
CREATE TABLE "SCOTT"."EXT_CASE1"
("ENAME" VARCHAR2(10),
"JOB" VARCHAR2(20),
"SAL" NUMBER
)
ORGANIZATION EXTERNAL
( TYPE ORACLE_LOADER
DEFAULT DIRECTORY "EXTDIR"
ACCESS PARAMETERS
( records delimited by newline
DBMS_METADATA.GET_DDL('TABLE','EXT_CASE1')
--------------------------------------------------------------------------------
skip 6
fields terminated by ","
(ename,job,sal)
)
LOCATION
( 'ldr_case1.ctl'
)
)
SQL>
另外DBMS_METADATA.GET_DDL預設的是檢視當前使用者的資訊,如果你以使用者A來檢視使用者B的表要在dbms_metadata.get_ddl的第三個引數里加上表/表空間的schmea,否則就會報ORA-31603。
以sysdba檢視scott的表(不加schmea):
SQL> show user
USER is "SYS"
SQL> select dbms_metadata.get_ddl('TABLE','BONUS') from dual;
ERROR:
ORA-31603: object "BONUS" of type TABLE not found in schema "SYS"
ORA-06512: at "SYS.DBMS_METADATA", line 1546
ORA-06512: at "SYS.DBMS_METADATA", line 1583
ORA-06512: at "SYS.DBMS_METADATA", line 1901
ORA-06512: at "SYS.DBMS_METADATA", line 2792
ORA-06512: at "SYS.DBMS_METADATA", line 4333
ORA-06512: at line 1
no rows selected
SQL>
以sysdba檢視scott的表(加schmea):
SQL> show user
USER is "SYS"
SQL> select dbms_metadata.get_ddl('TABLE','BONUS','SCOTT') from dual;
DBMS_METADATA.GET_DDL('TABLE','BONUS','SCOTT')
--------------------------------------------------------------------------------
CREATE TABLE "SCOTT"."BONUS"
("ENAME" VARCHAR2(10),
"JOB" VARCHAR2(9),
"SAL" NUMBER,
"COMM" NUMBER
) 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"
DBMS_METADATA.GET_DDL('TABLE','BONUS','SCOTT')
--------------------------------------------------------------------------------
SQL>
總結:
1)dbms_metadata.get_ddl()包()內的引數都要大寫。
2)是否查的當前使用者的DDL,不是要加上物件的schmea。
3)如果資訊顯示不全,set long 9999(隨便設定他的大小,就是為了完全顯示查詢的結果)。