[firebase-br] Unknown SQL Data type (0)

[Hélio Oliveira]

Boa tarde Colegas!

Ao tentar criar a SP abaixo recebo essa mensagem de erro e não consigo 
visualizar nada de errado na referida SP.

create or alter procedure user_manager (
   user_name      varchar(32),
   user_password  varchar(10),
   user_firstname varchar(30),
   user_lastname  varchar(30),
   Op_CUD         varchar(1)
   )
as
declare variable sql_text varchar(255);
begin
   if (:OP_CUD = 'C') then
     sql_text = 'create USER ' || :USER_NAME ||
                   'PASSWORD ' || :USER_PASSWORD ||
                  'FIRSTNAME ' || :USER_FIRSTNAME ||
                   'LASTNAME ' || :USER_LASTNAME;
   else
   begin
     if (:OP_CUD = 'U') then
     begin
       if (:USER_FIRSTNAME is not NULL) then
         sql_text = 'alter USER ' || :USER_NAME ||
                     'FIRSTNAME ' || :USER_FIRSTNAME ||
                      'LASTNAME ' || :USER_LASTNAME;
       if (:USER_PASSWORD is not NULL) then
         sql_text = 'alter USER ' || :USER_NAME ||
                      'PASSWORD ' || :USER_PASSWORD;
     end
     else
     begin
       if (:OP_CUD = 'D') then
         sql_text = 'drop USER ' || :USER_NAME;
     end
   end
   EXECUTE STATEMENT :sql_text;
end;

[ ]'s
Hélio Oliveira