Using package functions in an update

Okay, I have a package function that returns a correct value when used in a SELECT, but when used in an UPDATE, it returns Null. Why can't I used its result in the UPDATE?
Package Spec
FUNCTION fpub_get_contract_attribute
     (     n_contract_id_in                    IN               CONTRACT.CONTRACT_ID%TYPE,
          s_attribute_in                         IN               VARCHAR2 )
RETURN VARCHAR2;
PRAGMA RESTRICT_REFERENCES(fpub_get_contract_attribute,TRUST,WNDS);
Source :
clear;
rollback;
select
     contract_functions.fpub_get_contract_attribute(CONTRACT_ID,'ORIGINAL_SALES_CHANNEL') "Before",
     original_sales_channel
from contract
where contract_id = 52549615;
update contract
set original_sales_channel = NVL(contract_functions.fpub_get_contract_attribute(CONTRACT_ID,'ORIGINAL_SALES_CHANNEL'),'Null')
where contract_id = 52549615;
select
     NVL(contract_functions.fpub_get_contract_attribute(52549615,'ORIGINAL_SALES_CHANNEL'),'Null') "After",
     original_sales_channel
from contract
where contract_id = 52549615;
rollback;
Result :
Rollback complete
Before                ORIGINAL_SALES_CHANNEL
RE
1 row updated
After                 ORIGINAL_SALES_CHANNEL
Null                  Null
Rollback completeAny ideas?
Thanks,
Jason

Pragma restrict_references has not been required since 8i, so you can get rid of that. However, certain things will still be enforced, with or without the pragma. For example, you cannot perform DML from within a packaged function when that function is used in a select statement, although you can perform DML within a packaged function when it is used in an update statement. So, if you are performing some sort of DML in your function, it would not raise an error when used in the update statement, but would cause it to return whatever is specified in the exception block when used in a select statement, causing the different results.
Please see the demonstration below in which I have created a sample function that contains an insert statement. When I use the function from a select statement, it raises an error and does not insert a row. However, when I use the function in an update statement, it does not raise an error and inserts a row. I have then added an exception clause to the function and re-tested. When I used the function in a select statement, it now returns the value in the exception block, but still does not insert a row. When I used the function in an update statement, it returns a different value, not from the exception block, and inserts a row. Then I removed the insert statement from the function and re-tested. Now it returns the same value, whether used in a select statement or an update statement.
scott@ORA92> SELECT banner FROM v$version
2 /
BANNER
Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
PL/SQL Release 9.2.0.1.0 - Production
CORE     9.2.0.1.0     Production
TNS for 32-bit Windows: Version 9.2.0.1.0 - Production
NLSRTL Version 9.2.0.1.0 - Production
scott@ORA92> CREATE TABLE test
2    (col1 VARCHAR2(30))
3 /
Table created.
scott@ORA92> CREATE TABLE contract
2    (contract_id            NUMBER,
3      original_sales_channel VARCHAR2(30))
4 /
Table created.
scott@ORA92> INSERT INTO contract (contract_id) VALUES (52549615)
2 /
1 row created.
scott@ORA92> COMMIT
2 /
Commit complete.
scott@ORA92> CREATE OR REPLACE PACKAGE contract_functions
2 AS
3    FUNCTION fpub_get_contract_attribute
4       (n_contract_id_in IN CONTRACT.CONTRACT_ID%TYPE,
5        s_attribute_in   IN VARCHAR2 )
6       RETURN            VARCHAR2;
7 END contract_functions;
8 /
Package created.
scott@ORA92> SHOW ERRORS
No errors.
scott@ORA92> -- test with insert statement and no exception handling:
scott@ORA92> CREATE OR REPLACE PACKAGE BODY contract_functions
2 AS
3    FUNCTION fpub_get_contract_attribute
4       (n_contract_id_in IN CONTRACT.CONTRACT_ID%TYPE,
5        s_attribute_in   IN VARCHAR2 )
6       RETURN            VARCHAR2
7    IS
8    BEGIN
9       INSERT INTO test (col1) VALUES ('inserting');
10       RETURN 'Null';
11    END fpub_get_contract_attribute;
12 END contract_functions;
13 /
Package body created.
scott@ORA92> SHOW ERRORS
No errors.
scott@ORA92> SELECT * FROM contract
2 /
CONTRACT_ID ORIGINAL_SALES_CHANNEL
   52549615
scott@ORA92> COLUMN "Before" FORMAT A30
scott@ORA92> select contract_functions.fpub_get_contract_attribute (CONTRACT_ID, 'ORIGINAL_SALES_CHANNEL') "Before",
2          original_sales_channel
3 from   contract
4 where contract_id = 52549615
5 /
select contract_functions.fpub_get_contract_attribute (CONTRACT_ID, 'ORIGINAL_SALES_CHANNEL') "Before",
ERROR at line 1:
ORA-14551: cannot perform a DML operation inside a query
ORA-06512: at "SCOTT.CONTRACT_FUNCTIONS", line 9
scott@ORA92> SELECT * FROM test
2 /
no rows selected
scott@ORA92> update contract
2 set    original_sales_channel = NVL (contract_functions.fpub_get_contract_attribute (CONTRACT_ID, 'ORIGINAL_SALES_CHANNEL'), 'Null')
3 where contract_id = 52549615
4 /
1 row updated.
scott@ORA92> SELECT * FROM test
2 /
COL1
inserting
scott@ORA92> COLUMN "After" FORMAT A30
scott@ORA92> select contract_functions.fpub_get_contract_attribute (CONTRACT_ID, 'ORIGINAL_SALES_CHANNEL') "After",
2          original_sales_channel
3 from   contract
4 where contract_id = 52549615
5 /
select contract_functions.fpub_get_contract_attribute (CONTRACT_ID, 'ORIGINAL_SALES_CHANNEL') "After",
ERROR at line 1:
ORA-14551: cannot perform a DML operation inside a query
ORA-06512: at "SCOTT.CONTRACT_FUNCTIONS", line 9
scott@ORA92> SELECT * FROM test
2 /
COL1
inserting
scott@ORA92> --
scott@ORA92> -- repeat test with insert statement and exception handling:
scott@ORA92> ROLLBACK
2 /
Rollback complete.
scott@ORA92> CREATE OR REPLACE PACKAGE BODY contract_functions
2 AS
3    FUNCTION fpub_get_contract_attribute
4       (n_contract_id_in IN CONTRACT.CONTRACT_ID%TYPE,
5        s_attribute_in   IN VARCHAR2 )
6       RETURN            VARCHAR2
7    IS
8    BEGIN
9       INSERT INTO test (col1) VALUES ('inserting');
10       RETURN 'Null';
11    EXCEPTION
12       WHEN OTHERS THEN RETURN 'RE';
13    END fpub_get_contract_attribute;
14 END contract_functions;
15 /
Package body created.
scott@ORA92> SHOW ERRORS
No errors.
scott@ORA92> select contract_functions.fpub_get_contract_attribute (CONTRACT_ID, 'ORIGINAL_SALES_CHANNEL') "Before",
2          original_sales_channel
3 from   contract
4 where contract_id = 52549615
5 /
Before                         ORIGINAL_SALES_CHANNEL
RE
scott@ORA92> SELECT * FROM test
2 /
no rows selected
scott@ORA92> update contract
2 set    original_sales_channel = NVL (contract_functions.fpub_get_contract_attribute (CONTRACT_ID, 'ORIGINAL_SALES_CHANNEL'), 'Null')
3 where contract_id = 52549615
4 /
1 row updated.
scott@ORA92> SELECT * FROM test
2 /
COL1
inserting
scott@ORA92> select contract_functions.fpub_get_contract_attribute (CONTRACT_ID, 'ORIGINAL_SALES_CHANNEL') "After",
2          original_sales_channel
3 from   contract
4 where contract_id = 52549615
5 /
After                          ORIGINAL_SALES_CHANNEL
RE                             Null
scott@ORA92> SELECT * FROM test
2 /
COL1
inserting
scott@ORA92> --
scott@ORA92> -- repeat test with no insert statement and no exception handling:
scott@ORA92> ROLLBACK
2 /
Rollback complete.
scott@ORA92> CREATE OR REPLACE PACKAGE BODY contract_functions
2 AS
3    FUNCTION fpub_get_contract_attribute
4       (n_contract_id_in IN CONTRACT.CONTRACT_ID%TYPE,
5        s_attribute_in   IN VARCHAR2 )
6       RETURN            VARCHAR2
7    IS
8    BEGIN
9       RETURN 'Null';
10    END fpub_get_contract_attribute;
11 END contract_functions;
12 /
Package body created.
scott@ORA92> SHOW ERRORS
No errors.
scott@ORA92> select contract_functions.fpub_get_contract_attribute (CONTRACT_ID, 'ORIGINAL_SALES_CHANNEL') "Before",
2          original_sales_channel
3 from   contract
4 where contract_id = 52549615
5 /
Before                         ORIGINAL_SALES_CHANNEL
Null
scott@ORA92> SELECT * FROM test
2 /
no rows selected
scott@ORA92> update contract
2 set    original_sales_channel = NVL (contract_functions.fpub_get_contract_attribute (CONTRACT_ID, 'ORIGINAL_SALES_CHANNEL'), 'Null')
3 where contract_id = 52549615
4 /
1 row updated.
scott@ORA92> SELECT * FROM test
2 /
no rows selected
scott@ORA92> select contract_functions.fpub_get_contract_attribute (CONTRACT_ID, 'ORIGINAL_SALES_CHANNEL') "After",
2          original_sales_channel
3 from   contract
4 where contract_id = 52549615
5 /
After                          ORIGINAL_SALES_CHANNEL
Null                           Null
scott@ORA92> SELECT * FROM test
2 /
no rows selected
scott@ORA92>

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in_rspos_source    LIKE     resb-rspos,
in_rsart_source    LIKE     resb-rsart,
out_INDEX_BT       LIKE     SY-TABIX.
When I created the component, Requirement quantity of the component
was set to initial. I am trying to change that to 1.
in_resbd_new-MANDT = '200'.
in_resbd_new-RSNUM = '0000000708'. " from RESB-RSNUM
in_resbd_new-RSPOS = '0001'.             " from RESB-RSPOS
in_resbd_new-MATNR = '000000000000000072'. " RESB-MATNR
in_resbd_new-WERKS = '0010'.             " from RESB-WERKS
in_resbd_new-LGORT = '0010'.              "" from RESB-lgort
in_resbd_new-MENGE = '1'.
in_rsnum_source = '0000000708'.
in_rspos_source = '0001'.
CALL FUNCTION 'CO2M_COMPONENT_CHANGE_WITH_REF'
EXPORTING
    i_resbd_new          = in_resbd_new
    i_rsnum_source       = in_rsnum_source
    i_rspos_source       = in_rspos_source
    i_rsart_source       = in_rsart_source
IMPORTING
   E_INDEX_BT           = out_INDEX_BT
EXCEPTIONS
   ERROR_OCCURED        = 1
   OTHERS               = 2
The return value in out_index_bt is '1'.
Thanks for your help.

How can I use 3D function in Photoshop CS6 (student package)?

Please let me know how can I use 3D function in Photoshop CS6 (student package)?
Thanks,

Thanks so much for your helpful reply.
Now I' ve already installed Adobe Creative Suite 6 Production Premium (Student Package), Extended included. But when I open Photoshop CS6, there' s still no 3D function in menu bar.
Would you please tell me how to activate this function?
Thanks,

How to use group function in insert or update

Hai All
How can we use group function in insert or update statement
I am generating an attendance so i have different set of timing for example
0800,1200,1230, 1700 and i need to insert into these data into table with min value to intime and max value to
outtime and othere to inertval time in or out
Pls tell me with some example
For example
For INSERT
insert into T2 (barcode,empcode,intime,attend_date)
values(r2.cardn,r2.enpno,MIN(r2.ptime),r2.pdate);
For UPDATE
update dail_att set outtime= MAX(r2.ptime) where empcode=r2.enpno and barcode=r2.cardn and
attend_date=r2.pdate;
Here instead of where i need to use having so pls tell how to use
Thanks & Regards
Srikkanth.M

Hai Man
R2 is not a table name its a record
Let me explain clearly
I have to generate daily attendance for lot of employees So i have two table t1 and t2
T1 consist of three column empno,date,time
T2 consist of empno,name,date,intime,outtime,intrin,introut
So now i need to give the T1 Min value Of time to T2 Intime and T1 Max value of Time to T2 Outtime fields so there so many records while i am using
max(time) it gives the max value of all so i seperated by group function so now i have an error in subquery ie it is an single row subquery so i need to use multiple row subquery how i can use multiple row subquery in update statement
Thanks In Advance
Srikkanth.M

How to use type, packages, functions, and procedures in another schema ?

I have two target schema in one OWB project, such as A and B. In a mapping of A, I would like to use some types, packages, functions, and procedures from B. I have tried the method of synonym as suggested, but I could not find the metadata of these when importing ... The only type of synonym I can import is the synonym for table. Is there a bug for synonym?
If I cannot use synonym for this issue, is there another way to solve the problem?

Now, in some instances you will absolutely need to create the second module as Carsten describes, however it should also be noted that you can reference objects in things like Expressions even if you have not loaded up the metadata. It is only when you need strong binding that it becomes neccessary to import objects. For everything else, as long as the reference will resolve at compile-time then you are good to go.
For example, I have a function in one target schema (S1) and a private synonym to it in another(s2). A mapping in the S2 schema has an expression object that uses the synonym to the function in the expression property for a couple of the output attirbutes. The synonym has not been loaded into metadata - indeed OWB has no knowledge of its existance. But it resolves at compile time so the mapping validates and generates successfully.
Mike

Using a packaged function in a query

Hi ,
I have read the following statement (correct option for the question)in 1z0-147 questions.
The question is :: WHEN USING A PACKAGED FUNCTION IN A QUERY which of the following is true ::
The packaged function cannot execute DML statements against the table that is being queriedI tried the following to understand the above statement
create or replace package test_pk is
function fn_test(i number) return number ;
end;
create or replace package body test_pk is
function fn_test (i number) return number is
j number:=1;
begin
    insert into a values(200,300);
    commit;
   return j;
   end;
end test_pk; Upon executing the above function in the select statement
select TEST_PK.FN_TEST(1) from dualI got the error saying that Can't perform DML Inside SElect
Is this example for the above statement is TRUE ????
Could you please explain me if my example is wrong
Thanks
Edited by: Smile on Nov 22, 2012 9:47 AM

No, it is not true. Any function used in SQL is not allowed to perform a DML operation other than SELECT regardless if it is against the table that is being queried or not. Select is allowed against any table. And function in your example does INSERT which is not allowed. Also, Any function used in SQL is not allowed to perform commit/rollback/savepoint.
SY.
Edit: unless function is autonomous transaction.
Edited by: Solomon Yakobson on Nov 22, 2012 10:22 AM

I want single update query without use the function.

I want to update sells_table selling_code field with max date product_code from product table.
In product table there is multiple product_code date wise.
I have been done it with below quey with the use of function but can we do it in only one update query
without use the function.
UPDATE sells_table
SET selling_code = MAXDATEPRODUCT(ctd_vpk_product_code)
WHERE NVL(update_product_flag,0) = 0 ;
CREATE OR REPLACE FUNCTION HVL.maxdateproduct (p_product IN VARCHAR2) RETURN NUMBER
IS
max_date_product VARCHAR2 (100);
BEGIN
BEGIN
SELECT NVL (TRIM (product_code), 0)
INTO max_date_product
FROM (SELECT product_code, xref_end_dt
FROM product
WHERE TO_NUMBER (p_product) = pr.item_id
ORDER BY xref_end_dt DESC)
WHERE ROWNUM = 1; -- It will return only one row - max date product code
EXCEPTION
WHEN OTHERS
THEN
RETURN 0;
END;
RETURN max_date_product;
END maxdateproduct;
Thanks in Advance.

Hi,
Something like this.
update setlls_table st
        set selling_code =(select nvl(trim(product_code)) from
                              (select product_code
                                      , rank() over (partition by item_id order by xref_end_dt DESC) rn
                                   from product
                               ) pr
                               where rn =1
                                     and pr.item_id = st.ctd_vpk_product_code
                           ) where NVL(update_product_flag,0) = 0 ;As such not tested due to lack of input sample.
Regards
Anurag Tibrewal.

Using package functions in an update

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