Searching for a better design for function in sql where clause

We are using for a while a parameter management framework based on parameter hierarchy and matrix fully internazionalized. For implementation flexibility we never use primary key to access directly the parameter but used a function that return the corresponding primary key by selecting it in an array in a package with a parameter name or external identification number that never change.
All is working well ... the system is very flexible ... we are as developper very happy because we can offer a centralized management parameter system for the whole application.
Our problem is regarding the lack of sql performance when the packaged function are used in sql ... it seem that they are executed each time for earch row instead of only once and bind to the sql (as a bind variable). This is really a big issue. We solve the problem in PL/SQL by getting the parameter in variable and bind it the sql but it is not possible everythere and we will be interesting to know if somebody had similar problem and how we may solve the problem.
Thanks a lot

    select contractdate.contract_i
                            , contractdate.contractdate
                    from    contractdate
                            ,     (     select     contractdate.contract_i
                              , max( nvl( contractdate.dateto, sysdate) ) dateto
                         from     contractdate
                         where     contractdate.t_contractdate_i = firstexpiry
                         group by contract_i
                    ) contractdatelast
                    where     contractdate.contract_i = contractdatelast.contract_i
                    and     nvl( contractdate.dateto, sysdate ) = nvl( contractdatelast.dateto, sysdate )
                    and     contractdate.t_contractdate_i = t_contractdate_ipar.fgetflextypologyclassitem_i( t_contractdate_ipar.fis1stexpiry )t_contractdate_ipar.fgetflextypologyclassitem_i is the function that return the primary key corresponding to the internal identification number
t_contractdate_ipar.fis1stexpiry is the function that return the internal identification number
An array in a package contains class and items internal identification number with the corresponding primary key used in the whole application (label, description in the user language also). All data for item (parameters) are stored in the flextypologyclassitem table that is referred by all parameters in the application. An application manage this table as a centralized parameter system.

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SUBSTR function in the where clause

HI
I want to get a number of 15 digits from a column where the user only know the last 10 digits.
So that when the user enter a number with 10 digits, only the record of that specific number should be displayed.
And then when the user did not enter any number all the records in the table should be displayed.(this part works fine)
The problem is: when the user enters any last digits( last, second last, thirth last and so on) the records which satisfy this are retrieved, which is not supose to be the case.
I' am trying to use the substr function in the where clause but I'm not sure if it's working or not becasue the result of the query is just the same as before i used the substr.
Thanks

better to pad with '*' me thinks in case u have a number ending with 0's:
1 select empno,ename
2 from emp
3* where empno like '%'||lpad('&1',2,'*')
SQL> /
Enter value for 1: 0
old   3: where empno like '%'||lpad('&1',2,'*')
new   3: where empno like '%'||lpad('0',2,'*')
no rows selected
SQL> /
Enter value for 1: 00
old   3: where empno like '%'||lpad('&1',2,'*')
new   3: where empno like '%'||lpad('00',2,'*')
     EMPNO ENAME
      7900 JAMES
SQL> /
Enter value for 1:
old   3: where empno like '%'||lpad('&1',2,'*')
new   3: where empno like '%'||lpad('',2,'*')
     EMPNO ENAME
      7369 SMITH
      7499 ALLEN
      7521 WARD
      7566 JONES
      7654 MARTIN
      7698 BLAKE
      7782 CLARK
      7788 SCOTT
      7839 KING
      7844 TURNER
      7876 ADAMS
     EMPNO ENAME
      7900 JAMES
      7902 FORD
      7934 MILLER
14 rows selected.

CBO and functions in the WHERE clause

Hi,
Can anyone point me to any documents describing how the cost based optimizer treats functions in a WHERE clause?
For example, in
select ...
from ...
where ...
and my_package.my_function( t.some_column ) = 'Y'
...does the CBO treat "my_package.my_function" as a black box or does it go into the body of "my_package.my_function" and take into consideration the associated costs of all the SELECT statements in the function?
I've tried a few simple tests to answer the question, but I've received conflicting results. Has anyone had any experience with this?
Thanks in advance for your help.

Thanks for the info. Justin.
 
I think I've solved my problem, but I'll repeat it here in case it helps anyone else. Here is a very simplified example of what I was seeing.
 
A query like this:
 select
 a.party_id, b.cust_account_id
 from
 hz_parties a,
 hz_cust_accounts b
 where
 a.party_id = b.party_id
 and mis_hz_merge_veto_pkg.party_merge_will_be_vetoed(a.party_id) = 'N'was returning a drastically different execution plan than this
 select
 a.party_id, b.cust_account_id
 from
 hz_parties a,
 hz_cust_accounts b
 where
 a.party_id = b.party_id
 and mis_hz_merge_veto_pkg.account_merge_will_be_vetoed(b.cust_account_id) = 'N'I initially thought the difference was due to the fact that I was using different functions in the last line, but then I tried this version
 select
 a.party_id, b.cust_account_id
 from
 hz_parties a,
 hz_cust_accounts b
 where
 a.party_id = b.party_id
 and mis_hz_merge_veto_pkg.party_merge_will_be_vetoed(b.party_id) = 'N'and found that it gave me a different execution plan than the first SELECT as well, even though it used the same function. The difference seems to stem from the columns I use in the function parameter and not the choice of function.

Call a function in a where clause of a select

hello,
is it possible to call a function in a where clause of a select????
ex: select col1, col2
from my_table
where my_package.my_function(32199, 2008, col3, 'P');
and i have error message "ORA-00920: invalid relational operator"
FUNCTION my_function(v_matricule IN NUMBER,
          v_Year IN NUMBER,
          v_date IN DATE,
          v_type IN CHAR DEFAULT 'P')
RETURN BOOLEAN;
@+Rosagio

user10225229 wrote:
hello,
is it possible to call a function in a where clause of a select????
ex: select col1, col2
from my_table
where my_package.my_function(32199, 2008, col3, 'P');
and i have error message "ORA-00920: invalid relational operator"
FUNCTION my_function(v_matricule IN NUMBER,
          v_Year IN NUMBER,
          v_date IN DATE,
          v_type IN CHAR DEFAULT 'P')
RETURN BOOLEAN;You can call a function if it returns a datatype that is supported by SQL. BOOLEAN is NOT supported by SQL.

Function/Subrutine and where clause

Hi,
Is it possible to define a subroutine.function and use it in the SQL where clause in ABAP??
If so, any reference code??
Regards,
Kit

Hi Kit,
It is not possible to define a subroutine.function and use it in the SQL where clause in ABAP.
But you can use dynamic where clause. Try F1 on select.
Example
Display of flight connections after input of airline and flight number:
PARAMETERS: carr_id TYPE spfli-carrid,
            conn_id TYPE spfli-connid.
DATA:       where_clause TYPE STRING,
            and(4),
            wa_spfli TYPE spfli.
IF carr_id IS NOT INITIAL.
CONCATENATE 'CARRID = ''' carr_id '''' INTO where_clause.
and = ' AND'.
ENDIF.
IF conn_id IS NOT INITIAL.
CONCATENATE where_clause and ' CONNID = ''' conn_id ''''
    INTO where_clause.
ENDIF.
SELECT * FROM spfli INTO wa_spfli WHERE (where_clause).
WRITE: / wa_spfli-carrid, wa_spfli-connid, wa_spfli-cityfrom,
           wa_spfli-cityto, wa_spfli-deptime.
ENDSELECT.
Regards,
Clemens

Searching for a more elegant way to write my where clause.

Hi,
I have a table T which has two columns : X(Varchar2(100)), and Y(Varchar2(100)).I want to know all the rows in the table T for which two conditions are simultaneously true: the first condition is X is not null or Y is not null, and the second condition is not(X is not null and Y is not null). So I write my query like below:
select *
from T
where (X is not null or Y is not null) and not(X is not null and Y is not null)But the way I formulate my where clause doesn't seem elegant to me. Please, could I obtain the same result with a more elegant where clause?
Thanks.


where (X is not null or Y is not null) and not(X is not null and Y is not null) 
De Morgan 
where ((X is not null) or (Y is not null)) and (not(X is not null) or not(Y is not null)) 
where ((X is not null) or (Y is not null)) and (not(X is not null) or not(Y is not null)) 
double negation 
where ((X is not null) or (Y is not null)) and ((X is null) or (Y is null)) 
where ((X is not null) or (Y is not null)) and ((X is null) or (Y is null)) 
Distributivity of and over or 
where ((X is not null) and ((X is null) or (Y is null))) or ((Y is not null) and ((X is null) or (Y is null))) 
where ((X is not null) and ((X is null) or (Y is null))) or ((Y is not null) and ((X is null) or (Y is null))) 
Distributivity of and over or applied to the second term too 
where (((X is not null) and (X is null)) or ((X is not null) and (Y is null))) or (((Y is not null) and (X is null)) or ((Y is not null) and (Y is null))) 
Negation 
where ((<strike>(X is not null)</strike> not(Y is null) and (X is null)) or ((X is not null) and (Y is null))) or (((Y is not null) and (X is null)) or (<strike>(Y is not null)</strike> not(Y is null)) and (Y is null))) 
where ((not(X is null) and (X is null)) or ((X is not null) and (Y is null))) or (((Y is not null) and (X is null)) or (not(Y is null) and (Y is null))) 
Complementation 
where ((false) or ((X is not null) and (Y is null))) or (((Y is not null) and (X is null)) or (false)) 
where ((X is not null) and (Y is null)) or ((Y is not null) and (X is null)) 
preferring clarity (in the eye of beholder as always) over efficiency 
where x || y in (x,y) 
Regards
Etbin

Edited by: Etbin on 28.8.2011 11:45
steps separated with empty lines, negation enhanced

No output for XML Publisher Report using CASE/DECODE in Where Clause

Hi,
I've a business requirement to modify an existing report which has two input parameters,
-> p_statcode (Closed Status) which can have values 'Y' or 'N'
-> p_overdue (Overdue Flag) which can have values 'Y' or 'N'
The Overdue Flag is an evaluated column having values of Y/N and it is evaluated as follows,
ONTF_MOD_VAL(NVL (
                                     (TRUNC (SYSDATE)
                                      - (TO_DATE (oe_order_lines.attribute18,
                                                  'DD-MON-RRRR')
                                         + TO_NUMBER (fnd_lookup_values.meaning))),
                                     0
                        overdue_flagThe user requirement now is they needs to be a third option for parameter p_overdue called ALL,
passing which the output should include records having
p_statcode is Y ELSE p_statcode is N AND p_overdue is Y OR p_overdue is N
In other words records having both Y and N vlaues for Overdue Flag have to be returned irrespective of the value given to Closed Status.
Original where clause in the Data Definition file is as follows,
WHERE Closed_Status = nvl(:p_statcode,Closed_Status)
                   AND overdue_flag = nvl(:p_overdue,overdue_flag)My modified code is as follows,
WHERE   Closed_Status = NVL (:p_statcode, Closed_Status)
         AND overdue_flag = (CASE
         WHEN :p_overdue = 'Y' THEN 'Y'
         WHEN :p_overdue = 'N' THEN 'N'
         ELSE overdue_flag
         END)
OR
WHERE   Closed_Status = NVL (:p_statcode, Closed_Status)
         AND overdue_flag = DECODE (:p_overdue, 'Y', 'Y', 'N', 'N',overdue_flag)Both approaches have the same problem.
The output is in EXCEL format. The modified query works fine for p_overdue as Y or N but when p_overdue is passed as ALL it returns an empty EXCEL sheet with just the report output column headers.
Any help as to why this is the case ?? What is wrong in my approach ?
Regards,
Vishal

not clear about p_overdue = ALL
which values needed for p_overdue = ALL ?
try smth like
WHERE   Closed_Status = NVL (:p_statcode, Closed_Status)
AND (
   overdue_flag = DECODE (:p_overdue, 'Y', 'Y', 'N', 'N',overdue_flag) and :p_overdue != 'ALL'
   or
:p_overdue = 'ALL' and (overdue_flag = 'Y' or overdue_flag = 'N')
)for overdue_flag which has more then 'Y', 'N' values
if overdue_flag only in ('Y','N') then
WHERE   Closed_Status = NVL (:p_statcode, Closed_Status)
AND (
   overdue_flag = DECODE (:p_overdue, 'Y', 'Y', 'N', 'N',overdue_flag) and :p_overdue != 'ALL'
   or
:p_overdue = 'ALL'
)

Function calls in WHERE clause

Hello,
I have several procedures that all share a similar snippet of code in the WHERE clause. I tried to make this a function but, using a function increases the execution time of the calling procedure by a factor of ten. I am currently on 8i and will be moving to 9i soon. Was just wondering if there will be any performance increase from this type of function call on 9i vs. 8i.
Thanks
:)

sometimes a perforance hit it worth the maintability factor.I disagree, strongly. The developer's Prime Directive is to make the user's experience a good one. Inflicting poorly performing code on the user in the name of maintinability is not on.
Q: Why does the code have to be maintained so much?
A: Because the users' keep complaining about how slow it runs....
[SOAPBOX]
Of course in the real world things get confused and it can be quite difficult to distinguish programmers' issues - encapsulation, flexibility, maintainability - from users' issues - correctness, completeness, performance.
But the relative worth of these things is easy to assess. A highly-modular parameter driven architecture that delivers the wrong answer and takes an age to do it ain't worth jack. Even if it is so maintainable that it's easy to fix every bug in it.
[SOAPBOX]
"Whatever waits for us behind those doors, we have a better chance of survival if we stick together." Gladiator
Cheers, APC

To_Date function in the Where Clause

Hello All,
I'm having an issue using the to_date function that has me quite perplexed.
I have two varchar2 fields, one with a date value in the format Mon, DD YYYY, the other has a time value in the format HH:MI PM.
When I run my query one of the columns I retrieve looks like this TO_DATE (d4.adate || e4.atime, 'Mon DD, YYYYHH:MI PM'). The two fields are concatenated together and converted to a date. This works fine.
My problem occurs when I attempt to apply the same logic to the where clause of the aforementioned query. e.g. when I add the following criteria to my query and TO_DATE (d4.adate || e4.atime, 'Mon DD, YYYYHH:MI PM') <= sysdate I get an ORA-01843: not a valid month error.
To further illustrate my problem here are the two queries:
Select d4.adate, e4.atime, TO_DATE (d4.adate || e4.atime, 'Mon DD, YYYYHH:MI PM')
from ....
where ....
The above query works.
Select d4.adate, e4.atime, TO_DATE (d4.adate || e4.atime, 'Mon DD, YYYYHH:MI PM')
from ....
where ....
and TO_DATE (d4.adate || e4.atime, 'Mon DD, YYYYHH:MI PM') <= sysdate
The second query does not work.
The tables used and the limiting criteria are identical, except for the last one.
Does anyone have any ideas why this could be happening.
er

Hello,
Check this out. It does work. Do cut n paste sample
data from your tables.
SQL> desc test
Name Null? Type
ID NUMBER
DDATE VARCHAR2(20)
DTIME VARCHAR2(20)
SQL> select * from test;
ID DDATE DTIME
1 Jan, 10 2006 12:32 PM
2 Mar, 11 2005 07:10 AM
3 Apr, 13 2006 03:12 AM
4 Nov, 15 2003 11:22 PM
5 Dec, 20 2005 09:12 AM
6 Oct, 30 2006 10:00 AM
7 Jan, 10 2006 12:32 PM
8 Apr, 11 2005 07:10 AM
9 May, 13 2006 03:12 AM
10 Sep, 15 2003 11:22 PM
11 Oct, 20 2005 09:12 AM
12 Dec, 30 2006 10:00 AM
12 rows selected.
SQL> select id, ddate, dtime,
2 to_date(ddate||dtime,'Mon, DD YYYYHH:MI PM') AA,
A,
3 to_char(to_date(ddate||dtime,'Mon, DD YYYYHH:MI
MI PM'),'Mon, DD YYYYHH:MI PM') BB
4 from test;
ID DDATE DTIME
DTIME AA BB
1 Jan, 10 2006 12:32 PM
12:32 PM 10-JAN-06 Jan, 10 200612:32 PM
2 Mar, 11 2005 07:10 AM
07:10 AM 11-MAR-05 Mar, 11 200507:10 AM
3 Apr, 13 2006 03:12 AM
03:12 AM 13-APR-06 Apr, 13 200603:12 AM
4 Nov, 15 2003 11:22 PM
11:22 PM 15-NOV-03 Nov, 15 200311:22 PM
5 Dec, 20 2005 09:12 AM
09:12 AM 20-DEC-05 Dec, 20 200509:12 AM
6 Oct, 30 2006 10:00 AM
10:00 AM 30-OCT-06 Oct, 30 200610:00 AM
7 Jan, 10 2006 12:32 PM
12:32 PM 10-JAN-06 Jan, 10 200612:32 PM
8 Apr, 11 2005 07:10 AM
07:10 AM 11-APR-05 Apr, 11 200507:10 AM
9 May, 13 2006 03:12 AM
03:12 AM 13-MAY-06 May, 13 200603:12 AM
10 Sep, 15 2003 11:22 PM
11:22 PM 15-SEP-03 Sep, 15 200311:22 PM
11 Oct, 20 2005 09:12 AM
09:12 AM 20-OCT-05 Oct, 20 200509:12 AM
12 Dec, 30 2006 10:00 AM
10:00 AM 30-DEC-06 Dec, 30 200610:00 AM
12 rows selected.
SQL> select id, ddate, dtime,
to_date(ddate||dtime,'Mon, DD YYYYHH:MI PM')
2 from test
3 where id > 3
4 and to_date(ddate||dtime,'Mon, DD YYYYHH:MI PM')
') <= trunc(sysdate);
ID DDATE DTIME
DTIME TO_DATE(D
4 Nov, 15 2003 11:22 PM
11:22 PM 15-NOV-03
5 Dec, 20 2005 09:12 AM
09:12 AM 20-DEC-05
7 Jan, 10 2006 12:32 PM
12:32 PM 10-JAN-06
8 Apr, 11 2005 07:10 AM
07:10 AM 11-APR-05
10 Sep, 15 2003 11:22 PM
11:22 PM 15-SEP-03
11 Oct, 20 2005 09:12 AM
09:12 AM 20-OCT-05
6 rows selected.
SQL> select id, ddate, dtime,
to_date(ddate||dtime,'Mon, DD YYYYHH:MI PM')
2 from test
3 where id > 3
4 and to_date(ddate||dtime,'Mon, DD YYYYHH:MI PM')
') <= sysdate;
ID DDATE DTIME
DTIME TO_DATE(D
4 Nov, 15 2003 11:22 PM
11:22 PM 15-NOV-03
5 Dec, 20 2005 09:12 AM
09:12 AM 20-DEC-05
7 Jan, 10 2006 12:32 PM
12:32 PM 10-JAN-06
8 Apr, 11 2005 07:10 AM
07:10 AM 11-APR-05
10 Sep, 15 2003 11:22 PM
11:22 PM 15-SEP-03
11 Oct, 20 2005 09:12 AM
09:12 AM 20-OCT-05
6 rows selected.
-SriSorry Sri, but I fail to see what you mean. How is what you're doing any different than what I'm doing?

Function use in where clause

hi,
can we use output of a function in where clause directly ?
i.e
select node(condition1) clause from dual;
clause
occupation='SALARY'
then i want to use this output i.e clause string directly in select stmt.
select * from abc_table where clause
more strictly
select * from abc_table where (select node(condition1) clause from dual)
which is interpreted as
select * from abc_table where occupation='SALARY'
Is there any way to use functions in clause area ???
I tried CURSOR but not workd for this
Thanks in advance,
Rup

I cant really understand your problem
--fn1 is a function
sql>
select fn1
from dual;
FN1
CLERK
sql>
select * from emp
where job = fn1;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
7369 SMITH CLERK 7902 17-DEC-80 800     20
7876 ADAMS CLERK 7788 23-MAY-87 1100     20
7900 JAMES CLERK 7698 03-DEC-81 950     30
7934 MILLER CLERK 7782 23-JAN-82 1300     10
Message was edited by:
        jeneesh

Table function sensitive to where clause?

Hi-
In Oracle SQL, you can use the results of a PL/SQL function as a table with the "TABLE()" syntax. Example: "SELECT * FROM TABLE(myfunction(param1,param2)) ..."
Is there any (non-crazy) way for the function to be aware of the conditions in the WHERE clause of that SELECT statement? For example, if I wanted "myfunction" to know that I had specified "WHERE param3=10' without having to put param3 in the function call, could this be done?
Other SQL implementations support this. I know of at least one where you can map a table on top of a function where the "in" parameters can correspond to columns on the mapped table. Does Oracle support a similar syntax or strategy?

Not sure if it is too crazy for you ;)
But again I rely on a helper function since I am not sure about the purpose of the whole thing:
SQL> create or replace function set_param (p varchar2) return varchar2
as
begin
dbms_application_info.set_client_info(p);
return p;
end set_param;
Function created.
SQL> create or replace function myfunction
   return sys.dbms_debug_vc2coll
as
begin
   return sys.dbms_debug_vc2coll (sys_context ('userenv', 'client_info'));
end myfunction;
Function created.
SQL> select   *
from   table (myfunction())
where   set_param (3) is not null
COLUMN_VALUE
3                     Hope you get the idea ....

How to use a function in a Where Clause?

Hi,
I've got a doubt. If MY_FUNCT is a function that returns a boolean, can I use it in a where clause for writing a query like this?:
select ...
from table a
where ...
and MY_FUNC (a.field) = true
Thanks!
Edited by: Mark1970 on 2-lug-2010 3.27

Bear in mind that this could kill your performance.
Depending on what you're doing, how many tables and other predicates are involved, you might want to try to eliminate all other data early before applying your function predicate otherwise your function might be called more times than you might have imagined. Strategies for this include subquery factoring and the old ROWNUM trick for materialising an inline view.
If performance is impacted, you might also want to consider using a function-based index provided that the function is deterministic.

Trouble using a function in the where clause

Hello,
I am using a function found at ask.tom.oracle.com which converts a long data type to a character. The function is returning an error when it is placed in the where clause. The sql statement , error message and the function from ask tom are shown below. Does anyone know how to fix this?
<pre>
SELECT A.FLDPHYSICAL,
A.FLDEXPOSURE,
A.FLDDATEDUE,
A.FLDDATELAST,
A.FLDEMPLOYEE,
B.FLDBDATE,
B.FLDMAILSTOP,
B.FLDREC_NUM,
B.FLDLNAME,
B.FLDMI,
B.FLDFNAME,
B.FLDBDATE,
B.FLDDEPT,
B.FLDSTATUS,
B.FLDSSN,
B.FLDHOMEPHON,
B.FLDWORKPHON,
B.FLDID,
B.FLDDIVISION
FROM REQEXAM A,
EMPLOYEE B,
EMPLOYEE_MEMO C
WHERE A.FLDEMPLOYEE = B.FLDREC_NUM
AND b.flduserstr = c.fldrec_num
AND OHM_PKG.GET_LONG('EMPLOYEE_MEMO', 'FLDDATA', C.ROWID) LIKE '%CDL YES%'
AND A.FLDDATEDUE > '01/01/1900'
AND A.FLDPHYSICAL ='CDP'
ORDER BY B.FLDDIVISION,
B.FLDLNAME,
B.FLDFNAME,
B.FLDMI,
A.FLDDATEDUE
The error message
Error at Command Line:26 Column:4
Error report:
SQL Error: ORA-00904: "OHM_PKG"."GET_LONG": invalid identifier
00904. 00000 - "%s: invalid identifier"
create or replace
PACKAGE OHM_PKG AS
/* TODO enter package declarations (types, exceptions, methods etc) here */
function getlong( p_tname in varchar2,p_cname in varchar2,p_rowid in rowid ) return varchar2;
END OHM_PKG;
create or replace
PACKAGE BODY OHM_PKG AS
function getlong( p_tname in varchar2,p_cname in varchar2,p_rowid in rowid ) return varchar2 as
l_cursor integer default dbms_sql.open_cursor;
l_n number;
l_long_val varchar2(4000);
l_long_len number;
l_buflen number := 4000;
l_curpos number := 0;
begin
dbms_sql.parse( l_cursor,
'select ' || p_cname || ' from ' || p_tname ||
' where rowid = :x',
dbms_sql.native );
dbms_sql.bind_variable( l_cursor, ':x', p_rowid );
dbms_sql.define_column_long(l_cursor, 1);
l_n := dbms_sql.execute(l_cursor);
if (dbms_sql.fetch_rows(l_cursor)>0)
then
dbms_sql.column_value_long(l_cursor, 1, l_buflen, l_curpos ,
l_long_val, l_long_len );
end if;
dbms_sql.close_cursor(l_cursor);
return l_long_val;
end getlong;
END OHM_PKG;
</prev>

Remove the '_' from the function's name as below:
AND OHM_PKG.GETLONG('EMPLOYEE_MEMO', 'FLDDATA', C.ROWID) LIKE '%CDL YES%'

Better Design for EJB 3 and Java Web Dynpro

Hi all,
When using EJB Model on CE, to each method a Request and Response are generated. To a CRUD i've 4 methods.
I've a Foo (JPA Entity).
public Foo create(Foo)
public Foo update(Update)
public void remove(Foo)
public List<Foo> findBy...
I think that i could use a Single view for both create and update method. But i will need a separated context objects to each function.
Request_<Bean>_create
Request_<Bean>_update
What is better in this case? a single method createOrUpdate on my EJB? Or a View to each operation?
Best regards

Hi all,
Just to share my decision:
My EJB continue with the methods.
public Foo create(Foo)
public Foo update(Update)
public void remove(Integer)
public List<Foo> findBy...
Was generated one Request to each method.
Request_<Bean>_create
Request_<Bean>_update
I've mapped the both on my Component controller and have created on view to edit and create a new record.
When the record already exists i'm initializing the Request_<Bean>_createElement with record data, when is a new i've just initialize the new Foo object and put on currentElement of update.
On the generic save method of controller, a test is done to decide if the Request<Create> or Request<Update> model Object.
Best regards

Searching for a better design for function in sql where clause

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