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

Add a sign-up feature to a flat file login script
I'm working on a flat file login script and I would like to add a sign-up feature to it with a email

Is STL important?
I'm just starting programming and I've made it until the Standart Template Library. But the chapter

PL/SQL: ORA-00947: not enough values error message
Hi all i am getting Error(25,63): PL/SQL: ORA-00947: not enough values error message when executing

utf8_general_ci error ??
I have all kinds of data to be inserted in database table

//I am getting this error

Yo

Php mysql - select?
Hi i have this code:
Code: $iteminfo = mysql_query("SELECT desc FROM wc_items WHERE itemid =

distinct rows
Hi
version 10.2.0.3

I have a query output something like the following

ID

Got A Free Server :(
So I was given a free server

http://shopping.yahoo.com/p:Compaq%20ProLiant%201500%20Server:1

limit string by words??
hello all,

I was wonder if there is a function to limit a string by the number of words inste

User input in to variable
Hi all,

I'm sure this is very easy but I'm having another brain freeze!

At the end of

Batch Session SM35 stuck in status 'in Background
Hi Experts,

I am facing a problem with Batch Input session SM35.

The batch se