实例讲解如何查找某个对象的定义情况

[oracle@1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on 星期五 3月 18 02:23:03 2011

Copyright (c) 1982, 2005, Oracle. All rights reserved.

连接到:

Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production

With the Partitioning, OLAP and Data Mining options

sys@WUGQ10G> create user wugq identified by wugq;

用户已创建。

sys@WUGQ10G> grant resource,connect,plustrace to wugq;

授权成功。

sys@WUGQ10G> connect wugq/wugq

已连接。

wugq@WUGQ10G> select * from user_sys_privs;

USERNAME PRIVILEGE ADM

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

WUGQ UNLIMITED TABLESPACE NO

wugq@WUGQ10G> select * from user_role_privs;

USERNAME GRANTED_ROLE ADM DEF OS_

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

WUGQ CONNECT NO YES NO

WUGQ PLUSTRACE NO YES NO

WUGQ RESOURCE NO YES NO

wugq@WUGQ10G> select count(*) from v$fixed_table;

select count(*) from v$fixed_table

*

第 1 行出现错误:

ORA-00942: 表或视图不存在

wugq@WUGQ10G> connect / as sysdba

已连接。

sys@WUGQ10G> grant select on v_$fixed_table to wugq;

授权成功。

sys@WUGQ10G> connect wugq/wugq

已连接。

wugq@WUGQ10G> select count(*) from v$fixed_table;

COUNT(*)

----------

1383

wugq@WUGQ10G> connect / as sysdba

已连接。

sys@WUGQ10G> grant select any table to wugq;

授权成功。

scott@WUGQ10G> select count(*) from v$fixed_table;

COUNT(*)

----------

1383

scott@WUGQ10G> select count(*) from v_$fixed_table;

select count(*) from v_$fixed_table

*

第 1 行出现错误:

ORA-00942: 表或视图不存在

scott@WUGQ10G> select count(*) from sys.v_$fixed_table;

COUNT(*)

----------

1383

scott@WUGQ10G> select * from user_role_privs;

USERNAME GRANTED_ROLE ADM DEF OS_

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

SCOTT CONNECT NO YES NO

SCOTT DBA NO YES NO

SCOTT RESOURCE NO YES NO

scott@WUGQ10G> select * from user_sys_privs;

USERNAME PRIVILEGE ADM

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

SCOTT UNLIMITED TABLESPACE NO

scott@WUGQ10G> select count(*) from v$fixed_table;

COUNT(*)

----------

1383

scott@WUGQ10G> select * from v_$fixed_table where rownum<2;

select * from v_$fixed_table where rownum<2

*

第 1 行出现错误:

ORA-00942: 表或视图不存在

sys@WUGQ10G> select * from v$fixed_table where rownum<2;

NAME OBJECT_ID TYPE TABLE_NUM

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

X$KQFTA 4294950912 TABLE 0

sys@WUGQ10G> select * from sys.v_$fixed_table where rownum<2;

NAME OBJECT_ID TYPE TABLE_NUM

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

X$KQFTA 4294950912 TABLE 0

scott@WUGQ10G> set heading off echo off long 50000 pages 10000

scott@WUGQ10G> select * from v$fixed_view_definition where view_name='V$FIXED_TABLE';

V$FIXED_TABLE

select NAME , OBJECT_ID , TYPE , TABLE_NUM from GV$FIXED_TABLE where inst_id = USERENV('Instance')

scott@WUGQ10G

> select * from v$fixed_view_definition where view_name='GV$FIXED_TABLE';

GV$FIXED_TABLE

select inst_id,kqftanam, kqftaobj, 'TABLE', indx from x$kqfta union all select inst_id,kqfvinam, kqf

viobj, 'VIEW', 65537 from x$kqfvi union all select inst_id,kqfdtnam, kqfdtobj, 'TABLE', 65537 from x

$kqfdt

scott@WUGQ10G> desc v$indexed_fixed_column

名称 是否为空? 类型

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

TABLE_NAME VARCHAR2(30)

INDEX_NUMBER NUMBER

COLUMN_NAME VARCHAR2(30)

COLUMN_POSITION NUMBER

scott@WUGQ10G> select * from v$indexed_fixed_column where table_name='X$KQFTA';

X$KQFTA 1 ADDR 0

X$KQFTA 2 INDX 0

scott@WUGQ10G> select * from v$fixed_view_defintion where view_name='GV$PX_PROCESS';

select * from v$fixed_view_defintion where view_name='GV$PX_PROCESS'

*

第 1 行出现错误:

ORA-00942: 表或视图不存在

scott@WUGQ10G> select * from v$fixed_view_definition where view_name='GV$PX_PROCESS';

GV$PX_PROCESS

select a.inst_id, a.kxfpdpnam, decode(bitand(a.kxfpdpflg, 16), 0, 'IN USE', 'AVAILABLE'), b.pid, a

.kxfpdpspid, c.sid, c.serial# from x$kxfpdp a, V$PROCESS b, V$SESSION c where bitand(kxfpdpflg, 8)

!= 0 and a.kxfpdpspid = b.SPID and a.kxfpdpspid = c.PROCESS(+)

scott@WUGQ10G> select * from v$fixed_view_definition where view_name='V$PX_PROCESS';

V$PX_PROCESS

select SERVER_NAME, STATUS, PID, SPID, SID, SERIAL# from GV$PX_PROCESS where inst_id = USERENV('In

stance')

scott@WUGQ10G> desc dba_views

名称 是否为空? 类型

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

OWNER NOT NULL VARCHAR2(30)

VIEW_NAME NOT NULL VARCHAR2(30)

TEXT_LENGTH NUMBER

TEXT LONG

TYPE_TEXT_LENGTH NUMBER

TYPE_TEXT VARCHAR2(4000)

OID_TEXT_LENGTH NUMBER

OID_TEXT VARCHAR2(4000)

VIEW_TYPE_OWNER VARCHAR2(30)

VIEW_TYPE VARCHAR2(30)

SUPERVIEW_NAME VARCHAR2(30)

scott@WUGQ10G> set heading off echo off long 1000000000 pages 10000

scott@WUGQ10G> select text from dba_views where view_name='DBA_USERS';

select u.name, u.user#, u.password,

m.status,

decode(u.astatus, 4, u.ltime,

5, u.ltime,

6, u.ltime,

8, u.ltime,

9, u.ltime,

10, u.ltime, to_date(NULL)),

decode(u.astatus,

1, u.exptime,

2, u.exptime,

5, u.exptime,

6, u.exptime,

9, u.exptime,

10, u.exptime,

decode(u.ptime, '', to_date(NULL),

decode(pr.limit#, 2147483647, to_date(NULL),

decode(pr.limit#, 0,

decode(dp.limit#, 2147483647, to_date(NULL), u.ptime +

dp.limit#/86400),

u.ptime + pr.limit#/86400)))),

dts.name, tts.name, u.ctime, p.name,

nvl(cgm.consumer_group, 'DEFAULT_CONSUMER_GROUP'),

u.ext_username

from sys.user$ u left outer join sys.resource_group_mapping$ cgm

on (cgm.attribute = 'ORACLE_USER' and cgm.status = 'ACTIVE' and

cgm.value = u.name),

sys.ts$ dts, sys.ts$ tts, sys.profname$ p,

sys.user_astatus_map m, sys.profile$ pr, sys.profile$ dp

where u.datats# = dts.ts#

and u.resource$ = p.profile#

and u.tempts# = tts.ts#

and u.astatus = m.status#

and u.type# = 1

and u.resource$ = pr.profile#

and dp.profile# = 0

and dp.type#=1

and dp.resource#=1

and pr.type# = 1

and pr.resource# = 1

scott@WUGQ10G> select substr(table_name,1,20) tabname,

2 substr(column_name,1,20) column_name,

3 rtrim(data_type)||'('||data_length')' from dba_tab_columns

4 where owner='&username'

5 /

输入 username 的值: SCOTT

原值 4: where owner='&username'

新值 4: where owner='SCOTT'

rtrim(data_type)||'('||data_length')' from dba_tab_columns

scott@WUGQ10G> select dbms_metadata.get_ddl(upper('TABLE'),upper('EMP')) from dual;

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"

scott@WUGQ10G>

scott@WUGQ10G> select dbms_metadata.get_ddl(upper('TABLE'),upper('DEPT')) from dual;

CREATE TABLE "SCOTT"."DEPT"

( "DEPTNO" NUMBER(2,0),

"DNAME" VARCHAR2(14),

"LOC" VARCHAR2(13),

CONSTRAINT "PK_DEPT" PRIMARY KEY ("DEPTNO")

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

) 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"

scott@WUGQ10G>

scott@WUGQ10G> select dbms_metadata.get_ddl('TABLE','DEPT','SCOTT') from dual;

CREATE TABLE "SCOTT"."DEPT"

( "DEPTNO" NUMBER(2,0),

"DNAME" VARCHAR2(14),

"LOC" VARCHAR2(13),

CONSTRAINT "PK_DEPT" PRIMARY KEY ("DEPTNO")

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

) 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"