Wrong result with different direction of index on Spider and underlying tables in handler mode

install soname 'ha_spider';

set spider_use_handler=3;

set spider_same_server_link= 1;

create table t (a int, b char(1), primary key(a));

insert into t VALUES (1,'f'),(2,'g'),(3,'j'), (4,'i'),(5,'h');

eval create server s foreign data wrapper mysql options 

(host '127.0.0.1', database 'test', user 'root', port $MASTER_MYPORT);

create table ts (a int, b char(1), primary key(a desc))

  engine=Spider COMMENT='wrapper "mysql", srv "s", table "t"';

select a, b from ts where a > 0 and b = 'g' order by a;

a	b