create or replace function PRICE.TEST_TR
( IN ID INTEGER      DEFAULT 1 
 ,IN DATE_START DATE DEFAULT '01-01-0001'
 ,IN DATE_END DATE DEFAULT current DATE 
 )
returns INTEGER
return 
        select count(*) 
        from PRICE.TRADE
        where ID_TOOL = ID
        and   MOMENT between DATE_START and DATE_END;

-- САМ ВЫЗОВ (ПРИМЕРНО КАК В ORACLE)        
select "PRICE"."TEST_TR"
(id =>1,DATE_START => '2010-01-01', DATE_END => '2011-01-01') 
from SYSIBM.SYSDUMMY1