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

Syntax Help
I'm trying to make a form that edits a php file which contains config settings. I'm using strings t

Creating a unique 'control panel' for each user
Hi there,

I'm thinking of designing a site that will allow users to sign up and have their ow

Help with some dates
I have a list of dates in an array:

$mondays = array(
strtotime("October 12, 2009

Stuck with preg_replace
Hi,

I'm trying to use preg_replace to remove part of the IP address submitted using a form on

Change snippet to use CURDATE
I am using time() in the snippet below, I would like to use CURDATE() and have the database setup fo

Displaying Site Logo/Icon on a Title tag
really need some help out here. I want to insert a Logo/Icon just like the one close to the "PH

Parse XML
Good day,

I use oempro software and try to parse XMLReturn but it's not working for me, simpl

Loosing changed contents when used FM REUSE_ALV_GRID_DISPLAY
Hi,

I have used FM REUSE_ALV_GRID_DISPLAY in my program as below.

CALL FUNCT

Weird Problem with curl while sending data
I am facing a weird problem with sending data to a site via curl.

If i send the value by this

please help me in this update statment
hi every one

if I have table and this data in it

id name
10

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