RE: PL/SQL exceptions handling help
- From: <jim.silverman@xxxxxxxxxxx>
- To: <tomdaytwo@xxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 29 Mar 2007 15:19:24 -0400
Tom, I noticed a couple of problems with your code.
First, you are declaring the identifier NEED_COMPLETE_REFRESH as both an
EXCEPTION and as a CONSTANT INTEGER; it can't be both. Remove the
second declaration.
Second, you're declaring the EXCEPTION within an inner block, yet the
handler appears in the outer block. Since the scoping rules don't allow
the outer block to "see" any local objects declared in the inner block,
the handler doesn't know about this declaration. Therefore, you'll need
to decide whether it is appropriate to either (a) move the declaration
of the EXCEPTION into the outer block (i.e., in the procedure header,
before the first BEGIN statement), or (b) move the handler into the
inner block (i.e., that starts with the DECLARE statement). The
semantics of the procedure will dictate which is appropriate.
Finally, as an aside, I'm a bit confused by the arguments you're passing
to dbms_snapshot.refresh. Since each is enclosed in apostrophes, it is
these constant character values, not the expression concatenating the
values of the variables v_owner, v_mview, and v_action, that will be
passed. Just FYI...
HTH...
=====================================
Jim Silverman
Senior Systems Database Administrator
Solucient, LLC - A Thomson Company
Telephone: 734-669-7641
FAX: 734-930-7611
E-Mail: jim.silverman@xxxxxxxxxxx
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Thomas Day
Sent: Thursday, March 29, 2007 1:32 PM
To: oracle-l Freelists
Subject: PL/SQL exceptions handling help
I've spent all morning R'ing the FMs and looking up
examples and I still can't get my PL/Sql to handle my user-defined
exception. Obviously I'm missing something that is clear as a bell to
all the people who post these examples. Any idea what it is?
Oracle 9i on AIX
SQL> l
1 create or replace
2 procedure refresh_snapshot (mv_id IN varchar2) is
3 ERR_NUM NUMBER:=0;
4 ERR_MSG VARCHAR2(100):=null;
5 v_owner varchar2(100):=null;
6 v_mview varchar2(100):=null;
7 sql_stmt varchar2(200):=null;
8 v_action varchar2(1):='F';
9 BEGIN
10 select username into v_owner from user_users;
11 DECLARE
12 need_complete_refresh exception;
13 need_complete_refresh CONSTANT INTEGER := -12035;
14
15 pragma
exception_init(need_complete_refresh,-12035);
16 Cursor V_SNAPSHOTS is
17 select name from user_snapshots;
18 BEGIN
19 Open V_SNAPSHOTS;
20 LOOP
21 FETCH V_SNAPSHOTS INTO v_mview;
22 EXIT WHEN V_SNAPSHOTS%NOTFOUND;
23
DBMS_SNAPSHOT.REFRESH('||v_owner||.||v_mview||','||v_action||');
24
sql_stmt:='DBMS_SNAPSHOT.REFRESH('||v_owner||'.'||v_mview||','||v_action
||');';
25 END LOOP;
26 CLOSE V_SNAPSHOTS;
27 END;
28 EXCEPTION WHEN need_complete_refresh then
v_action:='C';
29
DBMS_SNAPSHOT.REFRESH('||v_owner||.||v_mview||','||v_action||');
30
sql_stmt:='DBMS_SNAPSHOT.REFRESH('||v_owner||'.'||v_mview||','||v_action
||');';
31 -- EXCEPTION
32 WHEN OTHERS THEN
33 err_num := SQLCODE;
34 err_msg := SUBSTR(SQLERRM, 1, 100);
35 DBMS_OUTPUT.PUT_LINE (sql_stmt);
36 DBMS_OUTPUT.PUT_LINE (ERR_NUM||' '||ERR_MSG||'
snapshot is '||mv_ID);
37* END refresh_snapshot;
SQL> sho errors
Errors for PROCEDURE REFRESH_SNAPSHOT:
LINE/COL ERROR
--------
-----------------------------------------------------------------
0/0 PL/SQL: Compilation unit analysis terminated
12/2 PLS-00704: 'NEED_COMPLETE_REFRESH' must be
declared as an
exception
14/3 PL/SQL: Item ignored
27/20 PLS-00201: identifier 'NEED_COMPLETE_REFRESH'
must be declared
SQL>
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