Oracle存储过程本地编译方式

通常将Oracle存储过程编译为本地编译方式的测试记录.

测试用表:

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

测试用的存储过程:

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;

测试:

SQL> set serveroutput on
SQL> set timing on
--查看存储过程当前编译方式
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，将t1换成t_n表。

测试本地编译方式出来的存储过程运行速度.

-- 用本地编译方式编译存储过程pro_xcl
SQL> alter procedure pro_xcl compile plsql_code_type=native;
 
Procedure altered
 
Executed in 0.062 seconds
 --查看存储过程当前编译方式,可看到，已变成本地编译方式了
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

本地编译方式要快0.6秒，没有快到想象的夸张的地步。

设置当前session程序编译方式默认为本地编译:

alter session set plsql_code_type=native;

设置数据库默认程序为本地编译方式:

alter system set plsql_code_type=native;

与PLSQL编译相关一些参数：　　

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