How to create an apex collection to store and loop through the values

Question

I couldn't find any simple example to do this
Apex 4.2
I need to create an apex collection. I have a query that returns multiple roles for a user. I need to check to see if one of my item values is within the collection but am not sure how to do so. So far I have:
begin
APEX_COLLECTION.CREATE_COLLECTION (
p_collection_name => 'ALL_ROLES');
select count(granted_role) into count from dba_role_privs where upper(grantee) = upper(:APP_USER);
end;
How would I store the query results in the collection?

Answer 1

Trying to understand your code and a better suggestion:
declare
is_viewable boolean;
v_count number;
l_query varchar2(2000);
i_counter number(10) :=1;
begin
--l_query := 'select granted_role from dba_role_privs where upper(grantee) = upper(:APP_USER)';
--why do you need a collection, this is a simple select count(1) question
APEX_COLLECTION.CREATE_COLLECTION_FROM_QUERY (
p_collection_name => 'ALL_ROLES',
p_query => l_query,
p_generate_md5 => 'YES');
-- You create a collection, but where are you using it?
-- select count(granted_role) into count from dba_role_privs where upper(grantee) = upper(:APP_USER);
-- discard the above code
-- If you want to see  how many elements in a collection
-- determine # of elements in a collection
http://docs.oracle.com/cd/E23903_01/doc/doc.41/e21676/apex_collection.htm#CJAFFEAH
v_count := APEX_COLLECTION.COLLECTION_MEMBER_COUNT ('ALL_ROLES');
IF :P32_SUBMISSION_DATE IS NOT NULL THEN
  begin
  select count(granted_role) into v_count
     from dba_role_privs
  where upper(grantee) = upper(:APP_USER) and
    granted_role in ('SURVEY_SUID','SURVEY_JOB_SUID');
  exception
  when no_rows_found then
    v_count := 0;
  end;
  if v_count > 0 then
    is_viewable := true;
  else
    is_viewable := false;
  endif;
else
  is_viewable := false;
endif;
return is_viewable;
end;Thank you,
Tony Miller
Ruckersville, VA