[20170615]执行dbms_sqldiag.dump_trace看执行计划.txt

[20170615]执行dbms_sqldiag.dump_trace看执行计划.txt

--//上午在想查看10053执行计划时使用包时出现如下提示:

SCOTT@book> @ &r/ver1
PORT_STRING                    VERSION        BANNER
------------------------------ -------------- --------------------------------------------------------------------------------
x86_64/Linux 2.4.xx            11.2.0.4.0     Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

SCOTT@book> select     count(*) from    t1 where    skew = 73;
  COUNT(*)
----------
        73

SCOTT@book> @ &r/dpc '' ''
PLAN_TABLE_OUTPUT
-------------------------------------
SQL_ID  41bbtn98pwgyq, child number 0
-------------------------------------
select     count(*) from    t1 where    skew = 73
Plan hash value: 2432955788
----------------------------------------------------------------------------
| Id  | Operation         | Name  | E-Rows |E-Bytes| Cost (%CPU)| E-Time   |
----------------------------------------------------------------------------
|   0 | SELECT STATEMENT  |       |        |       |     1 (100)|          |
|   1 |  SORT AGGREGATE   |       |      1 |     3 |            |          |
|*  2 |   INDEX RANGE SCAN| T1_I1 |     86 |   258 |     1   (0)| 00:00:01 |
----------------------------------------------------------------------------
Query Block Name / Object Alias (identified by operation id):
-------------------------------------------------------------
   1 - SEL$1
   2 - SEL$1 / T1@SEL$1
Predicate Information (identified by operation id):
---------------------------------------------------
   2 - access("SKEW"=73)

--//使用包dbms_sqldiag.dump_trace最大的好处是无需硬分析,而使用10053要进行硬分析才能获得执行计划.

SCOTT@book> @ &r/10053x 41bbtn98pwgyq 0
BEGIN dbms_sqldiag.dump_trace(p_sql_id=>'41bbtn98pwgyq',p_child_number=>0,p_component=>'Compiler',p_file_id=>'41bbtn98pwgyq'); END;

*
ERROR at line 1:
ORA-44003: invalid SQL name
ORA-06512: at "SYS.DBMS_ASSERT", line 206
ORA-06512: at "SYS.DBMS_SQLDIAG", line 1185
ORA-06512: at line 1
--//报错.

SYS@book> grant execute on dbms_sqldiag to scott;
Grant succeeded.
--//以sys用户授权后再次执行问题依旧.
SYS@book> revoke execute on dbms_sqldiag from scott;
Revoke succeeded.

--//google,百度发现别人都可以,而且我以前的测试也没有遇到问题.最终我发现只要p_file_id参数第1个字母不是数字就ok了,例如:

SCOTT@book> exec dbms_sqldiag.dump_trace(p_sql_id=>'41bbtn98pwgyq',p_child_number=>0,p_component=>'Compiler',p_file_id=>'a1bbtn98pwgyq');
PL/SQL procedure successfully completed.

SCOTT@book> exec dbms_sqldiag.dump_trace(p_sql_id=>'41bbtn98pwgyq',p_child_number=>0,p_component=>'Compiler',p_file_id=>'11bbtn98pwgyq');
BEGIN dbms_sqldiag.dump_trace(p_sql_id=>'41bbtn98pwgyq',p_child_number=>0,p_component=>'Compiler',p_file_id=>'11bbtn98pwgyq'); END;

*
ERROR at line 1:
ORA-44003: invalid SQL name
ORA-06512: at "SYS.DBMS_ASSERT", line 206
ORA-06512: at "SYS.DBMS_SQLDIAG", line 1185
ORA-06512: at line 1

SCOTT@book> @ &r/desc_proc sys dbms_sqldiag dump_trace
INPUT OWNER PACKAGE_NAME OBJECT_NAME
sample : @desc_proc sys dbms_stats gather_%_stats

OWNER PACKAGE_NAME OBJECT_NAME SEQUENCE ARGUMENT_NAME        DATA_TYPE            IN_OUT    DATA_TYPE DEFAULTED
----- ------------ ----------- -------- -------------------- -------------------- --------- --------- ----------
SYS   DBMS_SQLDIAG DUMP_TRACE         1 P_SQL_ID             VARCHAR2             IN        VARCHAR2  N
                                      2 P_CHILD_NUMBER       NUMBER               IN        NUMBER    Y
                                      3 P_COMPONENT          VARCHAR2             IN        VARCHAR2  Y
                                      4 P_FILE_ID            VARCHAR2             IN        VARCHAR2  Y

--//P_FILE_ID参数仅仅字符类型,并没有说明第1个参数的字符是数字就不行,oracle真是很奇怪....