Ingres Raise Error versus Oracle Exceptions

Question

I am working on converting an ingres database and procedures to oracle. The Ingres procedure does 3 updates and after each one
if there is an error the procedure sets a different error. Ingres uses the raise error statement. So I am wondering how Oracle's exception handling compares. Is the error is written to a global area in Ingres and maybe passed along to the application as well in Ingres ?
Appreciate any experience you have in this.
Ingres example
create procedure table_move as declare
err integer not null;
begin
error = 0;
update the records in table a
if (iierrornumber > 0_ then
err =1;
raise error :err;
endif
if (iierrornumber =0) then
update the records in table b
If (iierrornumber > 0) then
err = 2;
raise error : err
endif
How would this be in Oracle. I am really flagging any error so would it be more like When others ?
Thanks.

Answer 1

How would this be in Oracle. I am really flagging any error so would it be more like When others ?You can find lots of examples and explanations regarding exception handling in the Oracle Docs.
Examples:
http://www.oracle.com/pls/db102/search?word=exception&partno=
Regarding using a WHEN OTHERS exception: it's usually programming a bug, unless you also RAISE your WHEN OTHERS.
See this thread for a 'thorough explanation' and don't be afraid to scroll on, it's getting more interesting while doing that ;) :
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1509245700346768268#tom1535781400346575552
If you really want to 'flag' any error and your DB version is at least 10gr2, I suggest you use DML Error Logging.
See:
http://tkyte.blogspot.com/2005/07/how-cool-is-this.html
http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/sqlplsql.htm#sthref3393