Variable uses and placement

Posted on 16th Feb 2014 07:03 pm by admin

I'm new to PL/SQL and am trying to learn about variable valid uses/placement (any pointers to any docs is appreciated...)
All of the docs I've looked only mention declaration and assignment not valid placement.

When I use an input parameter to a cursor placement matters . I just don't understand why...

example... using the value "SCOTT" as an input parm to the c10 cursor replaces the "str_in" variable correctly and works...

1 declare
2 cursor c10(str_in IN varchar2) is
3 select username
4 from dba_users where username=str_in ;
5 begin
6 for r_c10 in c10('SCOTT') loop
7 dbms_output.put_line(r_c10.username);
8 end loop;
9* end;
SQL> /
SCOTT

PL/SQL procedure successfully completed.

However, when trying to replace another "word" it won't resolve the reference...

example... attempting to replace the from table_name as an input parm, no go...

1 declare
2 cursor c10(str_in IN varchar2) is
3 select username
4 from str_in where username='SCOTT' ;
5 begin
6 for r_c10 in c10('DBA_USERS') loop
7 dbms_output.put_line(r_c10.username);
8 end loop;
9* end;
SQL> /
from str_in where username='SCOTT' ;
*
ERROR at line 4:
ORA-06550: line 4, column 6:
PL/SQL: ORA-00942: table or view does not exist
ORA-06550: line 3, column 1:
PL/SQL: SQL Statement ignored
ORA-06550: line 7, column 26:
PLS-00364: loop index variable 'R_C10' use is invalid
ORA-06550: line 7, column 5:
PL/SQL: Statement ignored

Why can't it resolve the string ?

Any help is appreciated
dumb newbie...

Your Answer:

Login to answer

Other forums

PHP If Else statement for breadcrumb
Hi

I am trying to use a PHP if else statement to display a breadcrumb link on wordpress

Warning message
I've put a website that I was doing live and I'm getting this warning message when I try to add a ne

Problem with an browser game.
Hello,i just joined that great forum and i got php prob,its kinda freaky...anyway i got browser game

Check something, wait, check again, do something!
Hi guys.

I wonder if someone can help me with this.

Basically, what I want to do is (

elseif help!
OK so I'm new to the site, as well as PHP altogether (Trying my hand at managing an online RPG) and

PHP Surveys
I really would like some advice.

If you have a client come to you asking for a survey to be d

Update Database
Hi All,


I have a problem with this:

Code: [Select]<?php
session_start();

SuperCali PHP Event Calendar
does anyone have any experience with the SuperCali PHP Event Calendar? I could use some assistance

is_dir() problem
Hello,

I'm buidling a php scripts that dynamically get's subfolders from a specific folder.

problems with contact forms that are only protected against SQL injections
What could be a potential problem with contact forms that are only protected against SQL injections