Associative array related problem

Question

Hi All,
When I am trying to use assotiative array in a select statement I recieve the following error:
ORA-06550: line 9, column 22:
PLS-00201: identifier 'COL1' must be declared
ORA-06550: line 9, column 22:
PLS-00201: identifier 'COL1' must be declared
ORA-06550: line 9, column 10:
PL/SQL: ORA-00904: : invalid identifier
ORA-06550: line 9, column 3:
PL/SQL: SQL Statement ignored
Here is the example
--create table MyTable (col1 varchar2(255), col2 varchar2(255))
declare
  type m_ttMyTable
    is table of MyTable%rowtype index by MyTable.col1%type;
  m_tMyTable                   m_ttMyTable;
  m_sCol2 varchar2(255);
begin
  select m_tMyTable (col1).col2  /* works with ocntant: select m_tMyTable */('col1').col2
    into m_sCol2
  from MyTable
  where rownum = 1;
end;
--drop table MyTableAny ideas how to workaround this?
Thanks

Answer 1

The only collection types SQL can query are ones defined in SQL using CREATE TYPE. That excludes associative arrays, as they are PL/SQL-only constructs. I'd recommend a nested table collection.
Some more suggestions:
www.williamrobertson.net/documents/collection-types.html