How to use BOOLEAN type in SELECT statement

Question

I have a PL/SQL function with BOOLEAN in parameter:

function get_something(name in varchar2, ignore_notfound in boolean);

This function is

Answer 1

The BOOLEAN data type is a PL/SQL data type. Oracle does not provide an equivalent SQL data type (...) you can create a wrapper function which maps a SQL type to the BOOLEAN type.

Check this: http://forums.datadirect.com/ddforums/thread.jspa?threadID=1771&tstart=0&messageID=5284