RE: Different behavior of Too_many_rows exception in pl/sql betwe

From: Norrell, Brian <BNorrell_at_QuadraMed.com>
Date: Thu, 21 Jun 2001 12:36:50 -0700
Message-ID: <F001.00332891.20010621123540@fatcity.com>

I have seen code that depends on the 8.1 behavior. It does bring up a question I have always wondered about. The question for the internals ubergeeks is: which of the following is best to use? (All should have the same result, so which one has the best performance and why?)

A)
declare
y number;
begin
select x into y from z where rownum = 1; foo(y);
end;

B)
declare
  y number;
begin
  begin
    select x into y from z;
  exception
    when too_many_rows then null;
  end;
  foo(y);
end;

C)
declare
  y number;
  cursor c is
    select x into y from z;
begin
  open c;
  fetch c into y;
  close c;
  foo(y);
end;

D) something else more clever or obscure ???

Brian Norrell
Manager, MPI Development
QuadraMed
511 E John Carpenter Frwy, Su 500
Irving, TX 75062
(972) 831-6600

-----Original Message-----
[mailto:Prasada.Gunda1_at_hartfordlife.com] Sent: Thursday, June 21, 2001 2:34 PM
To: Multiple recipients of list ORACLE-L v7&v8i

We noticed a different behavior with too_many_rows exception in v7 and v8i. Is this a bug or that's the way it should work in 8i?

I really appreciate your feedback on this. Thanks & Regards,
Prasad

declare
v_table_name user_tables.table_name%TYPE; begin
v_table_name := null;
select table_name
into v_table_name
from user_tables;
dbms_output.put_line('v_table_name : '||nvl(v_table_name,'null')); exception
when too_many_rows then

dbms_output.put_line('too_many_rows exception, v_table_name : ' ||nvl(v_table_name,'null'));
when others then

dbms_output.put_line(sqlerrm);
end;
/

In v7.3, It keeps value remains null in v_table_name column and v8i it is assigning the first received value.
In both cases, It is raising too_many_rows exception.

Output in v7.3:

too_many_rows exception, v_table_name : null

PL/SQL procedure successfully completed.

Output in v8.1.7, v8.1.6, v8.1.5

too_many_rows exception, v_table_name : CHAMPION_LIFE_DGNSS_CATEGORY

PL/SQL procedure successfully completed.

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Author:
INET: Prasada.Gunda1_at_hartfordlife.com

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Author: Norrell, Brian
INET: BNorrell_at_QuadraMed.com

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