RECORD TYPE rows from multiple tables

Hi,


I have to query 50 columns from different tables in PL-SQL block. (only one row will be selected)
So in INTO clause i have to declare 50 variables or otherwise I have to create RECORD TYPE of that specified query so is there any way we can define the dynamic RECORD TYPE depending on multiple table columns.

THANKS AND REGARDS
SudeesSoftware DeveloperAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

MikeOM_DBACommented:
Your question is not clear, please provide sample of the source table definitions, state the requirements clearly and post a sample of the expected results.
0
Wasim Akram ShaikCommented:
Re-read your question and understood what you meant..
you want the record type to be defined dynamically, this is not directly possible, however there is a work around for this kind of scenario

where in you have to define a weak cursor


Say you have a function returning a ref cursor like:
CREATE FUNCTION record_type_cursor (v_sql) RETURN SYS_REFCURSOR AS
   l_cur SYS_REFCURSOR;
BEGIN
   OPEN l_cur FOR
      v_sql;
   RETURN l_cur;
END;You can then call it like:
SQL> DECLARE
  2     v_sql varchar2(1000):='select * from emp';
  3
 4    
  5     l_rec rec_model%ROWTYPE;
  6     l_cur SYS_REFCURSOR;
  7  BEGIN
  8     l_cur := record_type_cursor (v_sql);
  9     LOOP
 10        FETCH l_cur INTO l_rec;
 11        EXIT WHEN l_cur%NOTFOUND;
 12        DBMS_OUTPUT.Put_Line('First name: '||l_rec.first_name);
 13     END LOOP;
 14  END;
 15  /
0
SudeesSoftware DeveloperAuthor Commented:
Hi Wasim,

First of all I would like to say thanks for giving time to understand my requirement, your code is looking good but what is the purpose of this line of code
     l_rec rec_model%ROWTYPE;
This line is declaring REC_MODEL named table or view ROWTYPE and it shows its not dynamic.
And in case, if V_SQL may have more than one table to query like DEPTNO and EMP then this procedure may not work..

Thanks and Regards,
0
flow01Commented:
if the 50 columns are always of the same type you can  use 1 definition example


declare
-- hardcode 1 example query as cursor definition
   cursor c1
   is
   select object_name col1, OBJECT_ID col2, created col3 from user_objects where rownum = 1;
   g_rec c1%rowtype;  -- create a record definition
begin
--   open c1;
--   fetch c1 into g_rec;
--   close c1;
--   dbms_output.put_line(g_rec.col1 || ';' || g_rec.col2 || ';' || g_rec.col3);
   execute immediate 'select object_name, OBJECT_ID, created from user_objects where rownum = 1'
   into g_rec;
   dbms_output.put_line(g_rec.col1 || ';' || g_rec.col2 || ';' || g_rec.col3);
   execute immediate 'select column_name, column_id, sysdate from user_tab_cols where rownum = 1'
   into g_rec;
   dbms_output.put_line(g_rec.col1 || ';' || g_rec.col2 || ';' || g_rec.col3);
   execute immediate q'{select 'a', 2, sysdate from dual}'
   into g_rec;
   dbms_output.put_line(g_rec.col1 || ';' || g_rec.col2 || ';' || g_rec.col3);
end;
/
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Wasim Akram ShaikCommented:
Yes.. I agree.. You cannot make everything dynamic.. You need to have a definition somewhere.. As plsql is a compiler based language it expects declaration, definition and then only execution part will work successfully.. If you have simple data types then go for a varchar2 declaration of all variables and declare a record set based on that.. If at all any number data types are there they will get converted implicitly.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Oracle Database

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.