普通用户使用dbms_xplan包查看执行计划需要对v$sql、v$sql_plan、v$session及v$sql_plan_statistics_all这四个视图同时具有select权限。
如果普通用户没有以上权限，执行SQL>select * from table(dbms_xplan.display_cursor(null,null,‘advanced‘));会报错如下：
SQL> select * from table(dbms_xplan.display_cursor(null,null,‘advanced‘));
PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------
User has no SELECT privilege on V$SESSION
为普通用户scott授予如上四个视图select权限：
SQL>grant select on v_$sql to scott;
SQL>grant select on v_$sql_plan to scott;
SQL>grant select on v_$sql_plan_statictics_all to scott;
SQL>grant select on v_$session to scott;
再次查询执行计划：
SQL> select * from table(dbms_xplan.display_cursor(null,null,‘advanced‘));
PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------------------------------------------------SQL_ID fv0v1agrdrjkv, child number 1
-----------------------------------------------------------------------------------------------------------------------
select * from table(dbms_xplan.display_cursor(null,null,‘advanced‘))
Plan hash value: 3713220770
---------------------------------------------------------------------------------------------------------------------------------
|Id|Operatio|Name|Rows|Bytes|Cost(%CPU)|Time ---------------------------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 29 (100)| | | 1 | COLLECTION ITERATOR PICKLER FETCH| DISPLAY_CURSOR | 2 | 4 | 29 (0)| 00:00:01 |
PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------------------------------------------------
Query Block Name / Object Alias (identified by operation id):
-------------------------------------------------------------
1 - SEL$4A78348A / [email protected]$E112F6F0
Outline Data
-------------
/*+
PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------------------------------------------------
BEGIN_OUTLINE_DATA
IGNORE_OPTIM_EMBEDDED_HINTS
OPTIMIZER_FEATURES_ENABLE(‘11.2.0.1‘)
DB_VERSION(‘11.2.0.1‘)
ALL_ROWS
FORCE_XML_QUERY_REWRITE
XML_DML_RWT_STMT
XMLINDEX_REWRITE
XMLINDEX_REWRITE_IN_SELECT
NO_COST_XML_QUERY_REWRITE
OUTLINE_LEAF(@"SEL$4A78348A")
PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------------------------------------------------
MERGE(@"SEL$E112F6F0")
OUTLINE(@"SEL$1")
OUTLINE(@"SEL$E112F6F0")
FULL(@"SEL$4A78348A" "KOKBF$"@"SEL$E112F6F0")
END_OUTLINE_DATA
*/
Column Projection Information (identified by operation id):
-----------------------------------------------------------
1 - VALUE(A0)[300]
PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------------------------------------------------
Note
-----
- cardinality feedback used for this statement
49 rows selected.
注意：授予普通用户dba权限也得授予如上四个视图的权限才可以普通用户查看执行计划。