版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/hpdlzu80100/article/details/84194678
本章内容：
1. PL/SQL调优工具
2. PL/SQL优化级别
3. 子程序内联
代码如下：
1. 查看dbmshptab.sql脚本内容
Rem
Rem $Header: rdbms/admin/dbmshptab.sql /main/4 2013/07/08 10:56:15 sylin Exp $
Rem
Rem dbmshptab.sql
Rem
Rem Copyright (c) 2005, 2013, Oracle and/or its affiliates.
Rem All rights reserved.
Rem
Rem NAME
Rem dbmshptab.sql - dbms hierarchical profiler table creation
Rem
Rem DESCRIPTION
Rem Create tables for the dbms hierarchical profiler
Rem
Rem NOTES
Rem The following tables are required to collect data:
Rem dbmshp_runs
Rem information on hierarchical profiler runs
Rem
Rem dbmshp_function_info -
Rem information on each function profiled
Rem
Rem dbmshp_parent_child_info -
Rem parent-child level profiler information
Rem
Rem The dbmshp_runnumber sequence is used for generating unique
Rem run numbers.
Rem
Rem The tables and sequence can be created in the schema for each user
Rem who wants to gather profiler data. Alternately these tables can be
Rem created in a central schema. In the latter case the user creating
Rem these objects is responsible for granting appropriate privileges
Rem (insert,update on the tables and select on the sequence) to all
Rem users who want to store data in the tables. Appropriate synonyms
Rem must also be created so the tables are visible from other user
Rem schemas.
Rem
Rem THIS SCRIPT DELETES ALL EXISTING DATA!
Rem
Rem MODIFIED (MM/DD/YY)
Rem sylin 06/12/13 - long identifier
Rem sylin 07/30/07 - Modify foreign key constraints with on delete
Rem cascade clause
Rem kmuthukk 06/13/06 - fix comments
Rem sylin 03/15/05 - Created
Rem
drop table dbmshp_runs cascade constraints;
drop table dbmshp_function_info cascade constraints;
drop table dbmshp_parent_child_info cascade constraints;
drop sequence dbmshp_runnumber;
create table dbmshp_runs
(
runid number primary key, -- unique run identifier,
run_timestamp timestamp,
total_elapsed_time integer,
run_comment varchar2(2047) -- user provided comment for this run
);
comment on table dbmshp_runs is
'Run-specific information for the hierarchical profiler';
create table dbmshp_function_info
(
runid number references dbmshp_runs on delete cascade,
symbolid number, -- unique internally generated
-- symbol id for a run
owner varchar2(32), -- user who started run -- dbms_id
module varchar2(32), -- module name -- dbms_id
type varchar2(32), -- module type
function varchar2(4000), -- function name
line# number, -- line number where function
-- defined in the module.
hash raw(32) DEFAULT NULL, -- hash code of the method.
-- name space/language info (such as PL/SQL, SQL)
namespace varchar2(32) DEFAULT NULL,
-- total elapsed time in this symbol (including descendats)
subtree_elapsed_time integer DEFAULT NULL,
-- self elapsed time in this symbol (not including descendants)
function_elapsed_time integer DEFAULT NULL,
-- number of total calls to this symbol
calls integer DEFAULT NULL,
--
primary key (runid, symbolid)
);
comment on table dbmshp_function_info is
'Information about each function in a run';
create table dbmshp_parent_child_info
(
runid number, -- unique (generated) run identifier
parentsymid number, -- unique parent symbol id for a run
childsymid number, -- unique child symbol id for a run
-- total elapsed time in this symbol (including descendats)
subtree_elapsed_time integer DEFAULT NULL,
-- self elapsed time in this symbol (not including descendants)
function_elapsed_time integer DEFAULT NULL,
-- number of calls from the parent
calls integer DEFAULT NULL,
--
foreign key (runid, childsymid)
references dbmshp_function_info(runid, symbolid) on delete cascade,
foreign key (runid, parentsymid)
references dbmshp_function_info(runid, symbolid) on delete cascade
);
comment on table dbmshp_parent_child_info is
'Parent-child information from a profiler runs';
create sequence dbmshp_runnumber start with 1 nocache;
2. 在C##STUDENT模式下执行该脚本（dbmshptab.sql）
SQL> @D:\app\pdh\product\12.1.0\dbhome_2\RDBMS\ADMIN\dbmshptab.sql
Table dropped.
Table dropped.
Table dropped.
Sequence dropped.
Table created.
Comment created.
Table created.
Comment created.
Table created.
Comment created.
Sequence created.3. 调试过程中遇到错误，留待后续解决
SQL> /* Formatted on 2018/11/20 23:19:53 (QP5 v5.256.13226.35538) */
SQL> DECLARE
2 v_num PLS_INTEGER;
3 v_run_id BINARY_INTEGER; -- run ID generated by the profiler
4
5 FUNCTION test_func (num1 IN PLS_INTEGER, num2 IN PLS_INTEGER)
6 RETURN PLS_INTEGER
7 IS
8 BEGIN
9 RETURN (num1 + num2);
10 END test_func;
11 BEGIN
12 DBMS_HPROF.START_PROFILING ('PLSHPROF_DIR', 'test.txt');
13
14 FOR i IN 1 .. 100000
15 LOOP
16 v_num := test_func (i - 1, i);
17 END LOOP;
18
19 DBMS_HPROF.STOP_PROFILING;
20
21 -- Analyze profiler output and display its run ID
22 v_run_id := DBMS_HPROF.ANALYZE ('PLSHPROF_DIR', 'test.txt');
23 DBMS_OUTPUT.PUT_LINE (
24 'Inline pragma is not enabled, run ID - '
25 || v_run_id);
26 END;
27 /
DECLARE
*
ERROR at line 1:
ORA-29280: invalid directory path
ORA-06512: at "SYS.DBMS_HPROF", line 38
ORA-06512: at line 12