如何在Oracle PL/SQL游标中遍历列 [英] How to loop through columns in an oracle pl/sql cursor

问题描述

我正在创建一个动态游标，我想遍历游标中存在的列.我该怎么办?

I am creating a dynamic cursor and I would like to loop over the columns that exist in the cursor. How would I do that?

例如:

create or replace procedure dynamic_cursor(empid in varchar2, RC IN OUT sys_refcursor) as
     stmt varchar2(100);
   begin
     stmt := 'select * from employees where id = ' || empid;
     open RC for stmt using val;

     for each {{COLUMN OR SOMETHING}}
       --TODO: Get this to work
     loop;
end;     

推荐答案

您将需要使用

You will need to use Oracle Dynamic SQL, most likely method 4.

抱歉，以上内容适用于Pro * C.您将需要使用 DBMS_SQL 包装.它相当复杂，但是将允许您在运行时解析，执行和获取所需的任意SQL语句.特别要看一下示例3和8.

Sorry, the above is for Pro*C. You will need to use the DBMS_SQL package. It's fairly complex, but will allow you to parse, execute, and fetch any arbitrary SQL statement you need, all at run time. In particular, have a look at examples 3 and 8.

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