Description:
------------
NO FUNCTION CAN BE CREATED ON SQLITE3! THERE ISN'T  A create_function OR create_aggregade LIKE SQLITE2 !! :(

Reproduce code:
---------------
nothing to reproduce

Expected result:
----------------
a function created to make queries like

PHP:
function sqlite_if($arg1,$arg2,$arg3){
  return($arg1?$arg2:$arg3);
}
create_function('if','sqlite_if',3)

SQLITE:
SELECT if(0=1, 'hellooo','ok')

RESULT:
'ok'

Actual result:
--------------
error - no function created