sql 绑定变量问题

SQL> create table T_BUSINESS_DATA(user_id number(16),status varchar2(2),oper_date date);

select * from T_BUSINESS_DATA t where 1=1 and t.APP_USER_ID=:userId and t.STATUS <> 1 order by t.operDate desc

SQL> variable userId number; 
SQL> exec :userId := 1;

PL/SQL procedure successfully completed.
select *
  from T_BUSINESS_DATA t
 where 1 = 1
   and t.user_id = :userId
   and t.STATUS <> 1 
 order by t.oper_date desc

SQL> select distinct user_id from T_BUSINESS_DATA;

   USER_ID
----------
	 1
      2222
       999
	 3
	10
	
	
select *
  from T_BUSINESS_DATA t
 where 1 = 1
   and t.user_id = :userId
   and t.STATUS <> 2 
 order by t.oper_date desc;
 
 select *
  from T_BUSINESS_DATA t
 where 1 = 1
   and t.user_id = :userId
   and t.STATUS <> 3 
 order by t.oper_date desc;

 
  select *
  from T_BUSINESS_DATA t
 where 1 = 1
   and t.user_id = :userId
   and t.STATUS <> 4
 order by t.oper_date desc;
	
 select *
  from T_BUSINESS_DATA t
 where 1 = 1
   and t.user_id = :userId
   and t.STATUS <> 5
 order by t.oper_date desc;
	
	
	   	SQL_TEXT	SQL_ID	EXECUTIONS
1	  select *   from T_BUSINESS_DATA t  where 1 = 1    and t.user_id = :userId    and t.STATUS <> 4  order by t.oper_date desc	2kykjpbwrbmxr	1
2	 select *   from T_BUSINESS_DATA t  where 1 = 1    and t.user_id = :userId    and t.STATUS <> 3  order by t.oper_date desc	8wqactbjt4vr5	1
3	 select *   from T_BUSINESS_DATA t  where 1 = 1    and t.user_id = :userId    and t.STATUS <> 5  order by t.oper_date desc	9x1nbtnky71hd	2
4	select *   from T_BUSINESS_DATA t  where 1 = 1    and t.user_id = :userId    and t.STATUS <> 1  order by t.oper_date desc	03cr9uphjkkct	1
5	select *   from T_BUSINESS_DATA t  where 1 = 1    and t.user_id = :userId    and t.STATUS <> 2  order by t.oper_date desc	86y3ddg9wzhg1	1
6	select *   from T_BUSINESS_DATA t  where 1 = 1    and t.user_id = :userId    and t.STATUS <> 4  order by t.oper_date desc	a2f1chc53b5nq	1
7	select sql_text, sql_id, a.executions   from v$sql a  where a.parsing_schema_name = 'TEST'  and sql_text like '%oper_date%'  order by 1,last_active_time desc 	1dwfvvkxmqn95	5




有5种状态,就会在内存里存在5条sql cursor，这里不需要使用绑定变量。