Oracle-L: Re: Passing in NULL via SQL ACCEPT

From: <Jared.Still_at_radisys.com>
Date: Wed, 13 Mar 2002 14:04:50 -0800
Message-ID: <F001.004282AD.20020313140450@fatcity.com>

Don't use ACCEPT

e.g.

col c_myvar noprint new_value u_myvar

prompt Please enter value for myvar:
set term off feed off
select '&&1' c_myvar from dual;
set term on feed on

begin

if '&&u_myvar' is null then

dbms_output.put_line('myvar is null'); else

dbms_output.put_line('myvar is &&u_myvar'); end if;

end;
/

undef 1

Jared

"Magaliff, Bill" <Bill.Magaliff_at_lendware.com> Sent by: root_at_fatcity.com
03/13/02 06:43 AM
Please respond to ORACLE-L

        To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
        cc: 
        Subject:        Passing in NULL via SQL ACCEPT

I'm writing an anonymous PL/SQL block that accepts various input from SQL*Plus via ACCEPT commands. I then take the SQL input and use it in the block, usually by assigning it to a PL/SQL variable.

If no value is specified on the ACCEPT line, it appears that nothing is passed into PL/SQL, not even NULL. I tried using NVL(&&variable,0) to reassign the supposed NULL to a 0, but the program returns an error that nothing exists in place of &&variable.

Any ideas how to catch this null, which I want to be a viable option (e.g.,
if the &&varible is NULL then perform certain operations).

Thanks much
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Author: Magaliff, Bill
INET: Bill.Magaliff_at_lendware.com

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Author:
INET: Jared.Still_at_radisys.com

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