Unable to create collection form query

Question

Hi all,
I am trying to create a collection from query. The code is under on load - before header process and is as follows:
declare
x varchar2(4000);
begin
x:= 'select mecnum from C_MECS where MECNUM = ';
x := x||v('P13_X');
if apex_collection.collection_exists(p_collection_name=>'COLLECTIONVIEWMEC') then
apex_collection.delete_collection(p_collection_name=>'COLLECTIONVIEWMEC');
end if;
APEX_COLLECTION.CREATE_COLLECTION_FROM_QUERY(
p_collection_name => 'COLLECTIONVIEWMEC',
p_query => x);
end;
P13_X is a text item populated from the previous page. But I am having trouble and am getting an error: Ora-00904"P36006" invalid identifier. Any help is greatly appreciated. Thanks in advance, regards,
Suma.

Answer 1

Must confess to not actually using collections yet (don't burn me for that!)
What I would be tempted to do it to replace your two lines of defining x with
x:= 'select mecnum from C_MECS where MECNUM = &P13_X.';
And then possibly setting this into another page item and verifying the query is syntatically correct
:P13_TEMP_ITEM_SQL_QUERY := x;
Phil