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...
Did you know?Explore Trending and Topic pages for more stories like this.

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...
No comments posted yet

Your Answer:

Login to answer
344 Like 49 Dislike
Previous forums Next forums
Other forums

Procedural to OOP
John Kleijn said that to avoid writing "crappy code", we should learn OOP and common OO pr

Strip Slashes Help
I've got a script that i've downloaded of the net to edit multiple fields from my sql database, and

Multiple while loops
I have several DB queries that I know should be returning results and aren't. I have a feeling it ha

Thread in PHP
Thread in PHP
Some basic use and basic code for thread in php
This is my question?

puting for loop in 1 value
hi ,

how do i put this code in 1 value:
Code: <?php
for ($i=1; $i<=5; $i

need good snippet manager
Hi. as i am coding and learning more, it is becoming difficult to manage code snippets. how you mana

Operating System
How in PHP or other language can I detect Operating system, ie Windows XP Home, Windows 7 Ultimate,

Inserting multiple records from single form
I've found a number of threads that deal with this issue, but I'm new to php and coding language so

Pagination
Okay here is the page in question: http://blenderteachings.000a.biz/tutorials.hamishhill.php

Can't find a decent web analytics!!!
I've downloaded and installed Piwik. It's location detection based on IP addresses is fairly inaccur

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash