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

Undefined Variable: PHP_SELF, pls help
Hi,

Im a newbie on PHP / MySQL programming and Im running a script to search one field on my

Get to know your fellow coder
I think it's time we got personal around here. There's a lot of code swapping and a few members kno

The IE or FF detector
Hello Friends,

Problem of today ( we seek for php help ) as following ,

we know all th

SCRIPT ERROR
Here is the CONTACT FORM I made for our website:

<form id="form1" name="

help with image upload code
Hello,

right now this code I have resizes images and then places them into the uploads folder

want a code for uploading and downloading
i m trying to upload and download to my site..i need upload and download code ...i use a code for up

MYSQL INSERT ID NOT WORKING
Code: $id = mysql_insert_id();
header("Location: ./?view=$id");
Why $id pulling blan

HELP with mysql_real_escape_string
I'm looking to remove apostrophes completely when someone enters lyrics but don't have a clue how to

php/xmlrpc class issue
I am working on xml-rpc in php to start with.

I have a class that only has variables defined

try catch error
I have been trying try catch but, I can't get it to work. The code opens a non existing file called