Oracle存儲過程本地編譯方式

通常將Oracle存儲過程編譯爲本地編譯方式的測試記錄.

  測試用表:  

SQL> create
table t1(rid number);

Table created

SQL> create table t_n(rid number);

Table created

SQL> create table t1(rid number);
 
Table created
 
SQL> create table t_n(rid number);
 
Table created

測試用的存儲過程:

create or
replace procedure pro_xcl(p1 varchar2)
is
begin
    dbms_output.put_line(p1);

    insert into t1
select rownum as rr
    from dual connect
by rownum < 1000000;
    commit;

exception
  when others then
     dbms_output.put_line(sqlcode||' : '||substr(sqlerrm,200));
end;

create or replace procedure pro_xcl(p1 varchar2)
is
begin
    dbms_output.put_line(p1);
  
    insert into t1 select rownum as rr 
    from dual connect by rownum < 1000000;
    commit;
   
exception
  when others then
     dbms_output.put_line(sqlcode||' : '||substr(sqlerrm,200));  
end;

測試:

SQL> set serveroutput
on
SQL> set timing on
--查看存儲過程當前編譯方式
SQL>  select plsql_code_type 
from all_plsql_object_settings where
name='PRO_XCL';

PLSQL_CODE_TYPE
--------------------------------------------------------------------------------
INTERPRETED

Executed in 0.14 seconds

SQL> exec pro_xcl('11g INTERPRETED');

11g INTERPRETED

PL/SQL procedure successfully completed

Executed in 4.68 seconds

SQL> set serveroutput on
SQL> set timing on
--查看存儲過程當前編譯方式
SQL>  select plsql_code_type from all_plsql_object_settings where name='PRO_XCL';
 
PLSQL_CODE_TYPE
--------------------------------------------------------------------------------
INTERPRETED
 
Executed in 0.14 seconds

SQL> exec pro_xcl('11g INTERPRETED');
 
11g INTERPRETED
 
PL/SQL procedure successfully completed
 
Executed in 4.68 seconds

  更改下，pro_xcl，將t1換成t_n表。

  測試本地編譯方式出來的存儲過程運行速度.

-- 用本地編譯方式編譯存儲過程pro_xcl
SQL> alter procedure pro_xcl compile plsql_code_type=native;

Procedure altered

Executed in 0.062 seconds
--查看存儲過程當前編譯方式,可看到，已變成本地編譯方式了
SQL>  select plsql_code_type 
from all_plsql_object_settings where
name='PRO_XCL';

PLSQL_CODE_TYPE
--------------------------------------------------------------------------------
NATIVE

Executed in 0.063 seconds


SQL> exec pro_xcl('11g NATIVE');

11g NATIVE

PL/SQL procedure successfully completed

Executed in 4.087 seconds

-- 用本地編譯方式編譯存儲過程pro_xcl
SQL> alter procedure pro_xcl compile plsql_code_type=native;
 
Procedure altered
 
Executed in 0.062 seconds
 --查看存儲過程當前編譯方式,可看到，已變成本地編譯方式了
SQL>  select plsql_code_type from all_plsql_object_settings where name='PRO_XCL';
 
PLSQL_CODE_TYPE
--------------------------------------------------------------------------------
NATIVE
 
Executed in 0.063 seconds


SQL> exec pro_xcl('11g NATIVE');
 
11g NATIVE
 
PL/SQL procedure successfully completed
 
Executed in 4.087 seconds

本地編譯方式要快0.6秒，沒有快到想象的誇張的地步。

設置當前session程序編譯方式默認爲本地編譯:

     alter session set plsql_code_type=native;

設置數據庫默認程序爲本地編譯方式:

   alter system set plsql_code_type=native;

與PLSQL編譯相關一些參數：　　

SQL> show parameter plsql

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
plsql_ccflags                        string
plsql_code_type                      string      INTERPRETED
plsql_debug                          boolean     
FALSE
plsql_optimize_level                 integer     2
plsql_v2_compatibility               boolean     
FALSE
plsql_warnings                       string      DISABLE:ALL