Merge spetrunia@bk-internal.mysql.com:/home/bk/mysql-5.0-opt

select group_concat(f1),group_concat(f2) from t1;

group_concat(f1)	group_concat(f2)

-0.123456	0.123456

create table t1 (

ua_id decimal(22,0) not null,

ua_invited_by_id decimal(22,0) default NULL,

primary key(ua_id)

);

insert into t1 values (123, NULL), (456, NULL);

this must not produce error 1048: 

select * from t1 where ua_invited_by_id not in (select ua_id from t1);

ua_id	ua_invited_by_id

drop table t1;

End of 5.0 tests

    my_decimal decimal_value;

    my_decimal *value= val_decimal(&decimal_value);

    if (null_value)

      return set_field_to_null(field);

      return set_field_to_null_with_conversions(field, no_conversions);

    field->set_notnull();

    error=field->store_decimal(value);

  }