使用remove_constants工具查看Oracle是否使用绑定变量
这个也是Tom大神写的工具。
https://asktom.oracle.com/pls/asktom/f?p=100:11:::::P11_QUESTION_ID:1163635055580
下面模拟没有绑定变量的环境,然后使用该工具查看
创建实验帐号
conn / as sysdba
create user edmond identified by edmond;
grant connect,resource,dba to edmond;
create table t(x int);
insert into t select rownum from dual connect by level<=10000;
create or replace procedure p1
as
l_cnt number;
begin
for i in 1 .. 10000
loop
execute immediate 'select count(*) from t where x=' || i into l_cnt;
end loop;
end;
/
在一个终端执行p1过程,开启另一个终端执行如下脚本:
set linesize 200;
col sql_text_wo_constants format a100;
可以看到结果如下,已经找到了没有绑定变量的语句。
新闻标题：使用remove_constants工具查看Oracle是否使用绑定变量
标题来源：http://azwzsj.com/article/jgpcgc.html
https://asktom.oracle.com/pls/asktom/f?p=100:11:::::P11_QUESTION_ID:1163635055580
下面模拟没有绑定变量的环境,然后使用该工具查看
创建实验帐号
conn / as sysdba
create user edmond identified by edmond;
grant connect,resource,dba to edmond;
create table t(x int);
insert into t select rownum from dual connect by level<=10000;
create or replace procedure p1
as
l_cnt number;
begin
for i in 1 .. 10000
loop
execute immediate 'select count(*) from t where x=' || i into l_cnt;
end loop;
end;
/
在一个终端执行p1过程,开启另一个终端执行如下脚本:
-
create table t1as select sql_textfrom v$sqlarea;
-
-
alter table t1add sql_text_wo_constantsvarchar2(1000);
-
-
create or replace function
-
remove_constants( p_queryin varchar2 ) return varchar2
-
as
-
l_querylong;
-
l_charvarchar2(1);
-
l_in_quotes booleandefault FALSE;
-
begin
-
for iin 1.. length( p_query)
-
loop
-
l_char:= substr(p_query,i,1);
-
if ( l_char= '''' and l_in_quotes)
-
then
-
l_in_quotes:= FALSE;
-
elsif( l_char= '''' and NOT l_in_quotes)
-
then
-
l_in_quotes:= TRUE;
-
l_query:= l_query|| '''#';
-
end if;
-
if ( NOT l_in_quotes) then
-
l_query:= l_query|| l_char;
-
end if;
-
end loop;
-
l_query:= translate( l_query, '0123456789', '@@@@@@@@@@' );
-
for iin 0.. 8 loop
-
l_query:= replace( l_query, lpad('@',10-i,'@'), '@' );
-
l_query:= replace( l_query, lpad(' ',10-i,' '), ' ' );
-
end loop;
-
return upper(l_query);
-
end;
-
/
-
update t1set sql_text_wo_constants= remove_constants(sql_text);
set linesize 200;
col sql_text_wo_constants format a100;
-
select sql_text_wo_constants, count(*)
-
from t1
-
group by sql_text_wo_constants
-
having count(*) > 100
-
order by 2
- /
可以看到结果如下,已经找到了没有绑定变量的语句。
新闻标题：使用remove_constants工具查看Oracle是否使用绑定变量
标题来源：http://azwzsj.com/article/jgpcgc.html
