For Loop with parameter in application process

Question

Hello,
I am working on a project for school and a loop in an application process is giving me a headache. I have an application from which I make an ajax call to an "on-demand" process. Here's a short version of the process:
declare
valuesList varchar2(32000) := '';
sqlWhere varchar2(32000) := '';
begin
begin
//calculations, but let's hard code sqlWhere for demonstration purposes
sqlWhere := ' where ID = 50';
for j in (select * from myview sqlWhere) loop
valuesList :=valuesList || '~rowsep~' || j.id || '~colsep~' || j.beds;
end loop;
     exception
     when no_data_found then null;
     when others then HTP.p('Error: ' || SQLERRM);
valuesList := substr(valuesList, 9, length(valuesList));
end;
htp.prn(valuesList);
end;
I thought the for loop would contain only one record but it lists all records in the view. Interestingly, when I replace the loop condition to 'select * from myview where ID = 50' it returns what it's supposed to.
Could someone please explain what I am doing wrong?
Thank you!

Answer 1

There are a couple of different options but using a variable in the sql statement and not the where clause needs an execute immediate. The link below gives a good overview and options to accomplish what you are trying to do.
execute immediate with for loop
Edited by: tread on Apr 23, 2012 1:09 PM