Passing variable number of arguments in a stored procedure

Hi Team,
i am facing a problem. I have a dynamic form which contains some checkboxes. The number of checkboxes are dynamically generated on querying the database. On the form submission i want to call a stored procedure that will update the values in the database. i want to know that is there any way to handle variable number of arguments in the stored procedure or can i get the variables through some session context and use it in my stored procedure.
Any help is greatly appreciated.
Thanks&Regards
Saurabh Jain

Hi Saurabh,
The method in which stored procedures are called on form submit is something as follows.
Let us take your scenario of a form which has multiple checkboxes and a submit button. On clicking the submit button, this form data is submitted using either get or post. The form's submit action invokes a procedure.
The HTML form code will look something like this..
htp.formOpen( curl => 'URL /myProcedure',
cmethod => 'post' );
htp.formCheckbox( cname => 'myCheckbox'
cvalue => 'A');
htp.formCheckbox( cname => 'myCheckbox'
cvalue => 'B');
htp.formCheckbox( cname => 'myCheckbox'
cvalue => 'C');
htp.formSubmit( cname => 'myButton',
cvalue => 'OK');
Now, whenever the submit button is clicked, all these form values are passed to our stored procedure 'myProcedure'.
"myProcedure" looks something like this.
procedure myProcedure
myCheckbox IN sys.owa_util.vc_arr,
myButton IN VARCHAR2
is
begin
end myProcedure;
The point to be noted here is that the name of the variable being passed in the procedure is the same as the name of the HTML element being created in the HTML form. So, there is a direct mapping between the elements in the HTML form and the procedure parameters.
Another noteworthy point is that since you have multiple checkboxes in your HTML form, it is impractical to name all the checkboxes differently and then pass those many parameters to your procedure (Imagine a scenario where there are a hundred check-boxes in an HTML form!). So portal allows you to give the same name (cname) to all the checkboxes in your HTML form, and if multiple checkboxes are checked, it will return all the checkbox values in an array (Note the usage of "myCheckbox IN sys.owa_util.vc_arr" in myProcedure).
You can check out this link for more information.
Re: retrieving data from fields
Thanks,
Ashish.

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Passing Variable Number of Parameters to Cobol Stored Procedure

Hi. I have a web front end that needs to access several different tables via Cobol stored procedures. It seems simple enough to call the stored procedures straight away (DAO Pattern perhaps?) but my boss is insistent on having an intermediate Cobol program that decides which table to access. I think he at a bigger picture than I can see.
The problem lies in the number of parameters that need to be passed to the stored procedures; some need 3, others needs 5, a few need 4. The only two solutions that I can think of are to pass EVERYTHING (we're talking 50 parameters or so) to the intermediate stored procedure and then pulling only what is needed from that data set to access the desired table. Solution number two involves passing everything to a temp table and then pulling what is needed from it. The former solution seems a little cleaner but still involves passing a lot of parameters. If Cobol could handle some sort of dynamic memory allocation (Vector) there seems to be a possible solution there. Though, as far as I know, that isn't possible.
Any ideas are much appreciated.
Thanks in advance,
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Hi Saurabh,
The method in which stored procedures are called on form submit is something as follows.
Let us take your scenario of a form which has multiple checkboxes and a submit button. On clicking the submit button, this form data is submitted using either get or post. The form's submit action invokes a procedure.
The HTML form code will look something like this..
htp.formOpen( curl => 'URL /myProcedure',
cmethod => 'post' );
htp.formCheckbox( cname => 'myCheckbox'
cvalue => 'A');
htp.formCheckbox( cname => 'myCheckbox'
cvalue => 'B');
htp.formCheckbox( cname => 'myCheckbox'
cvalue => 'C');
htp.formSubmit( cname => 'myButton',
cvalue => 'OK');
Now, whenever the submit button is clicked, all these form values are passed to our stored procedure 'myProcedure'.
"myProcedure" looks something like this.
procedure myProcedure
myCheckbox IN sys.owa_util.vc_arr,
myButton IN VARCHAR2
is
begin
end myProcedure;
The point to be noted here is that the name of the variable being passed in the procedure is the same as the name of the HTML element being created in the HTML form. So, there is a direct mapping between the elements in the HTML form and the procedure parameters.
Another noteworthy point is that since you have multiple checkboxes in your HTML form, it is impractical to name all the checkboxes differently and then pass those many parameters to your procedure (Imagine a scenario where there are a hundred check-boxes in an HTML form!). So portal allows you to give the same name (cname) to all the checkboxes in your HTML form, and if multiple checkboxes are checked, it will return all the checkbox values in an array (Note the usage of "myCheckbox IN sys.owa_util.vc_arr" in myProcedure).
You can check out this link for more information.
Re: retrieving data from fields
Thanks,
Ashish.

Passing array as a argument in the Stored Procedure/Function

Hello Friends,
I need a help, i Want one stored proedure/Function which take array as a argument and return an array also.
and the size of array should not be fixed.
I don't want to use Varray because for this I have to specified its size first.
I think Associative arry will work( For dynamic size) but I am not able to run it .
Is Associative arry(Index by Pls_Integer) support JDBC?
If yes, plz give me some clue. I have found some information of associative array in this url
http://www.oracle.com/technology/oramag/oracle/07-jan/o17odp.html
But I am not able to run this package through SQL and also not able to connect it through JDBC.
Is there any other alternative solution?
Thanks & Regards,
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This is my table structure :
SQL> desc jobs
Name Null? Type
JOB_ID NOT NULL VARCHAR2(10)
JOB_TITLE NOT NULL VARCHAR2(35)
MIN_SALARY NUMBER(6)
MAX_SALARY NUMBER(6)
My Requirement is, User will enter the above field value in the form of array. I need to store these value and after manupulating this I will return that value also.
Here I am using procedure just for testing purpuse.
In my case I will take one array argumentlike JOB_ID and after manupulating these data I will return that array value.
I am also not able to run this example through SQL.
Can U give me exact code for running this prog.
create or replace package associative_array as
-- define an associative array type for each column in the jobs table
type t_job_id is table of jobs.job_id%type index by pls_integer;
type t_job_title is table of jobs.job_title%type index by pls_integer;
type t_min_salary is table of jobs.min_salary%type index by pls_integer;
type t_max_salary is table of jobs.max_salary%type index by pls_integer;
-- define the procedure that will perform the array insert
procedure array_insert (p_job_id in t_job_id,
p_job_title in t_job_title,
p_min_salary in t_min_salary,
p_max_salary in t_max_salary);
end associative_array;
create or replace package body associative_array as
-- implement the procedure that will perform the array insert
procedure array_insert (p_job_id in t_job_id,
p_job_title in t_job_title,
p_min_salary in t_min_salary,
p_max_salary in t_max_salary) is
begin
forall i in p_job_id.first..p_job_id.last
insert into jobs (job_id,
job_title,
min_salary,
max_salary)
values (p_job_id(i),
p_job_title(i),
p_min_salary(i),
p_max_salary(i));
end array_insert;
end associative_array;
Regards,
manish Kumar

Can we write function with variable number of argument

Hi
Can anybody tell that can we pass variable number of arguments to a function in oracle 10gR2.
As in function decode we can pass variable no. of arguments upto 255 arguments, similarly can we creat a function which accept any no. of variables.

I'm not sure that this is what you were asking about, but depending on the logic you want to implement, you can declare the maximum possible number of parameters to your function, give them default values, and then pass to your func as many parameters as you want:
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a=, b=
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Variable number of arguments in procedure PL/SQL

Hello everyone,
I have a "simple" question : can a procedure PL/SQL take a variable number of arguments ?
In my case, the procedure is called by the submit button of a form, and the form has variable number of inputs...
Thanks you !

862447 wrote:
I have a "simple" question : can a procedure PL/SQL take a variable number of arguments ?No. Not in the style of Pascal and C/C++. E.g. int printf( char * format, … ) in C using va_list.
In my case, the procedure is called by the submit button of a form, and the form has variable number of inputs...There are a couple of merhods.
Code a fixed number of parameters in the procedure signature. Assign defaults to these. The caller can now select which parameters from the fixed list to use and which not.
Create a structure. For example, having a 100 parameters in a signature is something I will call plain stupidity. This creates usability issues, maintenance issues and even performance issues. And debugging will be a nightmare. So instead create a structure (aka record in the PL/SQL language or an object using the SQL language) - where this structure describes (in a structured and logical way) the list of parameters.
Neither of these method however allows the caller to pass a variable number parameters - the parameter signature is fixed. It has a fixed number of defined parameters.
So the only way to simulate a variable parameter signature is to use a collection. The collection itself is of course a single parameter passed. But it can have 0 elements. It can have a 1000 elements. And similar to a va_list in C/C++, the procedure can iterate through the data passed via the parameter by the caller.
Simple example:
//-- define the collection type, e.g. a collection of strings
create or replace type TStrings is table of varchar2(4000);The procedure's signature:
--// passing by referencing and not value should be considered
create or replace procedure FooProc( param TStrings ) is ..And to call this procedure with variable parameters:
--// calling it with 2 param value
FooProc( TString('123','testing') );
--// calling it with 5 param values
FooProc( TString('p1','p2','p3','p4','p5') );

Variable number of arguments in C functions

Hello. I know how to achieve creating a function that accepts a variable number of arguments. For example:
#include <stdio.h>
#include <stdarg.h>
int add (int x, ...);
int main (int argc, const char * argv[])
int result = add(3, 5, 3, 7);
printf("%d", result);
return 0;
int add (int x, ...)
va_list argList;
va_start(argList, x);
int sum = 0;
int i;
for (i = 0; i < x; ++i)
sum += va_arg(argList, int);
va_end(argList);
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Hi Tron -
I looked over my first response again, and it needs to be corrected. Fortunately Bob and Hansz straightened everything out nicely, but I still need to fix my post:
RayNewbie wrote:
Yes, the macros are designed to walk a list of args when neither the number of args or their type is known.
The above should have said. "The macros are designed to walk a list of args when neither the number of args or their type is known _at compile time_".
If I may both paraphrase and focus your original question, I think you wanted to know if there was any way the function could run without knowing the number of args to expect. The answer to this question is "No". In fact at runtime, the function must know both the number of args and the type of each.
Tron55555 wrote:
... the printf() function takes an optional number of arguments, and nowhere there do you have to specify an extra argument that represents the number of additional optional arguments being passed (unless maybe the number of formatting specifiers in the first argument determines this number).
As both Bob and Hansz have explained, the underlined statement is correct. Similarly, the example from the manual gives the number and types of the args in the first string arg.
Hansz also included an alternative to an explicit count or format string, which is to terminate the arg list with some pre-specified value (this is sometimes called a "sentinel" value. However when using a sentinel, the called function must know the data types. For example, you could never simply terminate the args with a sentinel and then pass a double followed by an int. The combined length of these args is 8 + 4 => 12 bytes, so unless the function knew which type was first at compile time, it wouldn't be possible to determine whether the list was 4+8 or 8+4 at runtime.
If you're interested in knowing why a variable arg function is limited in this way, or in fact how any C function finds its args, its parameters, and how to return to the calling function, you might want to do some reading about the "stack frame". You can learn the concept without getting into any assembler code. Here's an article that might be good to start with: [http://en.citizendium.org/wiki/Stack_frame].
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// these macros aren't usable; necessary type casts have been removed for clarity
typedef va_list char*;
#define va_start(ap,arg1) ap = &arg1 + sizeof(arg1)
#define va_arg(ap,type) *(ap += sizeof(type))
#define va_end(ap) 0
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- Ray

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blank
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Message was edited by: Sheetal Pisolkar

Hi,
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*     TABLES
*          RETURN STRUCTURE BAPIRET2 OPTIONAL
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Passing variable number of arguments in a stored procedure

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