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...
No comments posted yet
Your Answer:
Login to answer
344
49
Other forums
AUTONUMBER PROBLEM
Hello Everyone,
My name is Jones and i am new to this forum and to oracle. I am using ora
Need Successful Return
Hello I am currently working a form here, and I have everything figured out except when I click the
jquery validation in codeIgniter
hai i need to add client side validation to my fiels which are selected in a forloop.the fields are
PHP & Java
Hello,
can PHP code be used inside java code?
Code: <SCRIPT LANGUAGE="Java
mysq_num_rows
Hi,
I want to use:
Code: if(mysql_num_rows($ergebnis2)==2)
how can the value 2, be
Tracking Unique Clicks
Hi guys and gals,
Basically I have a database which tracks clicks on my outbound links, I do
Sending CC Info by email
I am a little bit less knowledgable in the security area as most developers and I know I have a lot
Regarding accessing SQL query issued by any user in Oracle 10g
Hi all,
i want to know the queries issued by various users accessing a database...
noob question
i traying to do a php form with auto replay for both(me and the user who send me a mail),
a u
Help with usergroups? prolly really quick
So were coding our own forums for a game system we made an we have the users level setup but now I n