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: SQLgt; create table t1(rid number); Table created SQLgt; c

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;

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;

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

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