RE: Null handlings in Pro*C

From: Srinivasan Subramanian kandallu <srinivasan.kandallu_at_wipro.com>
Date: Tue, 23 May 2000 15:28:46 +0530
Message-Id: <10506.106342@fatcity.com>

Hi Raman,

         It is as same as the way you do with indicator variables in Pro*c. Hope this program will clear your doubts.
Assume there is a table t3 with one NULL entry. SQL> desc t3

 Name                            Null?    Type
 ------------------------------- -------- ----
 A                                        NUMBER

insert into t3 values (NULL);
commit;

Pro*c Code starts from here:

#include<stdio.h>
EXEC SQL INCLUDE SQLCA;
EXEC SQL BEGIN DECLARE SECTION;
int i;
short ui = 0;
EXEC SQL END DECLARE SECTION;
main()
{
EXEC SQL WHENEVER SQLERROR do printf("Error =%s\n",sqlca.sqlerrm.sqlerrmc); i = iConnect();
EXEC SQL EXECUTE
begin
select a into :i:ui from t3;
end;
end-exec;
printf("ui = [%d]\n",ui);
printf("error code =[%d]\n",sqlca.sqlcode); }

Here is the Screen output:
ui = -1;
error code = 0

Regards,
Srini

-----Original Message-----
From: root_at_fatcity.com [mailto:root_at_fatcity.com]On Behalf Of raman.yagna_at_db.com
Sent: Tuesday, May 23, 2000 12:39 PM
To: Multiple recipients of list ORACLE-L Subject: RE: Null handlings in Pro*C

hi rick,

        Thanks for the answer . But my question was how to use indicator variables inside a plsql block inside a Pro*C program . Or is there any other way . Thanks once again.

Regards,
Raman

• Message History ----------------------------------------

Please respond to ORACLE-L_at_fatcity.com

To: ORACLE-L_at_fatcity.com
cc:

In Pro*C you assign to indicator variables by FETCH cursor_name INTO
:variable_name:indicator_variable_name

Rick

> -----Original Message-----

> From:   raman.yagna_at_db.com [SMTP:raman.yagna_at_db.com]
> Sent:   Monday, May 22, 2000 5:34 AM
> To:     Multiple recipients of list ORACLE-L
> Subject:     Null handlings in Pro*C
>
> Hi gurus,
>       Sorry for posting this question again . Can anyone help me in this
> regard .
>
> Regards,
> Raman
>
>


> ---------------------- Forwarded by Raman Yagna on 22/05/2000 16:22

> ---------------------------

>
>
> To:   ORACLE-L_at_fatcity.com
> cc:
> Subject:
>
> How to handle the indicator variables in a pl/sql block inside a Pro*C
> program. If we are using a select into or Fetch into then along with the
> host variable the indicator variable can be placed. But if the value is
> getting assigned to the host variable using an assignment statement , then
> how to put the indicator variable.
>
> Please take the following example  how the indicator variable can be put
> inside the PL/SQL block.
>
> main()
> {
> EXEC SQL BEGIN DECLARE SECTION;
>
> varchar salary[20];
> short ind_var;
>
> EXEC SQL END DECLARE SECTION;
>
> EXEC SQL EXECUTE
> DECLARE
>      l_tab_sal  varchar2(20);
>  BEGIN
>
>      Here I call a pl/sql block with the paramters and out value as
> l_tab_sal;
>
>     if l_tab_sal is null this is giving 1405 error . I can handle by
> specifying nvl but i want to handle thru indicator variables inside
> plsql block .
>
>     :salary := l_tab_sal;    /* HOW TO ASSIGN INDICATOR VARIABLE HERE */
>
> END;
> END EXEC;
>
> salary[salary.len] = '\0';
> printf ("value is %s",  salaray.arr);
> }
>
> Raman
>
>
> --
> Author:
>   INET: raman.yagna_at_db.com
>
> Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
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--
Author: Cale, Rick T (Richard)

  INET: RICHARD.T.CALE_at_saic.com

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--
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  INET: raman.yagna_at_db.com

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Received on Tue May 23 2000 - 04:58:46 CDT