sqlplus-在"IN"中使用绑定变量条款 [英] sqlplus - using a bind variable in "IN" clause

问题描述

我正在PL/SQL块中设置一个绑定变量，并且试图在另一个查询的IN表达式中使用它.像这样:

I am setting a bind variable in a PL/SQL block, and I'm trying to use it in another query's IN expression. Something like this:

variable x varchar2(255)

declare
    x varchar2(100);
begin
    for r in (select id from other_table where abc in ('&val1','&val2','&val3') ) loop
    x := x||''''||r.id||''',';
    end loop;
    --get rid of the trailing ','
    x:= substr(x,1,length(x)-1);

    select x into :bind_var from dual;
end;
/

print :bind_var;

select *
from some_table
where id in (:bind_var);

尝试使用"IN"列表中的绑定变量的查询出现错误(ORA-01722:无效数字).

And I get an error (ORA-01722: Invalid number) on the query that tries to use the bind variable in the "IN" list.

我希望得到的打印语句为'123','345'.

The print statement yiels '123','345' which is what I expect.

是否可以像这样使用绑定变量，还是应该尝试其他方法?

Is it possible to use the bind variable like this or should I try a different approach?

(使用Oracle 10g)

(using Oracle 10g)

说明:

这是为了和解.我要跑步

This is for a reconcilliation sort of thing. I want to run

select *
from some_table
where id in (select id from other_table where abc in ('&val1','&val2','&val3'))

在脚本的主要部分(此处未显示)之前，将删除整个记录.之后，我想再次运行它以验证是否未删除some_table中的记录.但是，other_table中的数据确实会被此过程删除，所以我不能仅引用other_table中的数据，因为那里什么也没有.我需要一种方法来保存other_table.id值，以便以后可以验证父记录.

before the main part of the script (not pictured here) deletes a whole bunch of records. I want to run it again afterwards to verify that records in some_table have NOT been deleted. However, the data in other_table DOES get deleted by this process so I can't just refer to the data in other_table because there's nothing there. I need a way to preserve the other_table.id values so that I can verify the parent records afterwards.

推荐答案

我将other_table.id存储在PL/SQL表中，然后在查询中引用该表:

I would store the other_table.id's in a PL/SQL table and reference that table in the query afterwards:

type t_id_table is table OF other_table.id%type index by binary_integer;
v_table t_id_table;

-- fill the table
select id
bulk collect into v_table
from other_table 
where abc in ('&val1','&val2','&val3');     

-- then at a later stage...    

select *
from some_table st
,    table(cast(v_table AS t_id_table)) idt
where st.id = idt.id;

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