Why does Spring Data make extra requests?

Question

Java

There is the following JPA repository method:

@Query("select new com.example.sweater.domain.dto.MessageDto(" +
            "   m, " +
            "   count(ml), " +
            "   sum(case when ml = :user then 1 else 0 end) > 0" +
            ") " +
            "from Message m left join m.likes ml " +
            "group by m")
    Page<MessageDto> findAll(Pageable pageable, @Param("user") User user);

Problem: instead of one request, which is specified in the annotation @Query, requests are still flying to the database to select EACH message separately.
Question: why is this happening and how to deal with it?
All code is available on github
UPD1: request log:

Hibernate: select message0_.id as col_0_0_, count(user2_.id) as col_1_0_, sum(case when user2_.id=? then 1 else 0 end)>0 as col_2_0_ from message message0_ left outer join message_likes likes1_ on message0_.id=likes1_.message_id left outer join usr user2_ on likes1_.user_id=user2_.id group by message0_.id order by message0_.id desc limit ?
Hibernate: select message0_.id as id1_0_0_, message0_.user_id as user_id5_0_0_, message0_.filename as filename2_0_0_, message0_.tag as tag3_0_0_, message0_.text as text4_0_0_, user1_.id as id1_4_1_, user1_.activation_code as activati2_4_1_, user1_.active as active3_4_1_, user1_.email as email4_4_1_, user1_.password as password5_4_1_, user1_.username as username6_4_1_, roles2_.user_id as user_id1_2_2_, roles2_.roles as roles2_2_2_ from message message0_ left outer join usr user1_ on message0_.user_id=user1_.id left outer join user_role roles2_ on user1_.id=roles2_.user_id where message0_.id=?
Hibernate: select message0_.id as id1_0_0_, message0_.user_id as user_id5_0_0_, message0_.filename as filename2_0_0_, message0_.tag as tag3_0_0_, message0_.text as text4_0_0_, user1_.id as id1_4_1_, user1_.activation_code as activati2_4_1_, user1_.active as active3_4_1_, user1_.email as email4_4_1_, user1_.password as password5_4_1_, user1_.username as username6_4_1_, roles2_.user_id as user_id1_2_2_, roles2_.roles as roles2_2_2_ from message message0_ left outer join usr user1_ on message0_.user_id=user1_.id left outer join user_role roles2_ on user1_.id=roles2_.user_id where message0_.id=?
Hibernate: select message0_.id as id1_0_0_, message0_.user_id as user_id5_0_0_, message0_.filename as filename2_0_0_, message0_.tag as tag3_0_0_, message0_.text as text4_0_0_, user1_.id as id1_4_1_, user1_.activation_code as activati2_4_1_, user1_.active as active3_4_1_, user1_.email as email4_4_1_, user1_.password as password5_4_1_, user1_.username as username6_4_1_, roles2_.user_id as user_id1_2_2_, roles2_.roles as roles2_2_2_ from message message0_ left outer join usr user1_ on message0_.user_id=user1_.id left outer join user_role roles2_ on user1_.id=roles2_.user_id where message0_.id=?
Hibernate: select message0_.id as id1_0_0_, message0_.user_id as user_id5_0_0_, message0_.filename as filename2_0_0_, message0_.tag as tag3_0_0_, message0_.text as text4_0_0_, user1_.id as id1_4_1_, user1_.activation_code as activati2_4_1_, user1_.active as active3_4_1_, user1_.email as email4_4_1_, user1_.password as password5_4_1_, user1_.username as username6_4_1_, roles2_.user_id as user_id1_2_2_, roles2_.roles as roles2_2_2_ from message message0_ left outer join usr user1_ on message0_.user_id=user1_.id left outer join user_role roles2_ on user1_.id=roles2_.user_id where message0_.id=?
Hibernate: select message0_.id as id1_0_0_, message0_.user_id as user_id5_0_0_, message0_.filename as filename2_0_0_, message0_.tag as tag3_0_0_, message0_.text as text4_0_0_, user1_.id as id1_4_1_, user1_.activation_code as activati2_4_1_, user1_.active as active3_4_1_, user1_.email as email4_4_1_, user1_.password as password5_4_1_, user1_.username as username6_4_1_, roles2_.user_id as user_id1_2_2_, roles2_.roles as roles2_2_2_ from message message0_ left outer join usr user1_ on message0_.user_id=user1_.id left outer join user_role roles2_ on user1_.id=roles2_.user_id where message0_.id=?
Hibernate: select message0_.id as id1_0_0_, message0_.user_id as user_id5_0_0_, message0_.filename as filename2_0_0_, message0_.tag as tag3_0_0_, message0_.text as text4_0_0_, user1_.id as id1_4_1_, user1_.activation_code as activati2_4_1_, user1_.active as active3_4_1_, user1_.email as email4_4_1_, user1_.password as password5_4_1_, user1_.username as username6_4_1_, roles2_.user_id as user_id1_2_2_, roles2_.roles as roles2_2_2_ from message message0_ left outer join usr user1_ on message0_.user_id=user1_.id left outer join user_role roles2_ on user1_.id=roles2_.user_id where message0_.id=?
Hibernate: select message0_.id as id1_0_0_, message0_.user_id as user_id5_0_0_, message0_.filename as filename2_0_0_, message0_.tag as tag3_0_0_, message0_.text as text4_0_0_, user1_.id as id1_4_1_, user1_.activation_code as activati2_4_1_, user1_.active as active3_4_1_, user1_.email as email4_4_1_, user1_.password as password5_4_1_, user1_.username as username6_4_1_, roles2_.user_id as user_id1_2_2_, roles2_.roles as roles2_2_2_ from message message0_ left outer join usr user1_ on message0_.user_id=user1_.id left outer join user_role roles2_ on user1_.id=roles2_.user_id where message0_.id=?
Hibernate: select message0_.id as id1_0_0_, message0_.user_id as user_id5_0_0_, message0_.filename as filename2_0_0_, message0_.tag as tag3_0_0_, message0_.text as text4_0_0_, user1_.id as id1_4_1_, user1_.activation_code as activati2_4_1_, user1_.active as active3_4_1_, user1_.email as email4_4_1_, user1_.password as password5_4_1_, user1_.username as username6_4_1_, roles2_.user_id as user_id1_2_2_, roles2_.roles as roles2_2_2_ from message message0_ left outer join usr user1_ on message0_.user_id=user1_.id left outer join user_role roles2_ on user1_.id=roles2_.user_id where message0_.id=?
Hibernate: select message0_.id as id1_0_0_, message0_.user_id as user_id5_0_0_, message0_.filename as filename2_0_0_, message0_.tag as tag3_0_0_, message0_.text as text4_0_0_, user1_.id as id1_4_1_, user1_.activation_code as activati2_4_1_, user1_.active as active3_4_1_, user1_.email as email4_4_1_, user1_.password as password5_4_1_, user1_.username as username6_4_1_, roles2_.user_id as user_id1_2_2_, roles2_.roles as roles2_2_2_ from message message0_ left outer join usr user1_ on message0_.user_id=user1_.id left outer join user_role roles2_ on user1_.id=roles2_.user_id where message0_.id=?
Hibernate: select message0_.id as id1_0_0_, message0_.user_id as user_id5_0_0_, message0_.filename as filename2_0_0_, message0_.tag as tag3_0_0_, message0_.text as text4_0_0_, user1_.id as id1_4_1_, user1_.activation_code as activati2_4_1_, user1_.active as active3_4_1_, user1_.email as email4_4_1_, user1_.password as password5_4_1_, user1_.username as username6_4_1_, roles2_.user_id as user_id1_2_2_, roles2_.roles as roles2_2_2_ from message message0_ left outer join usr user1_ on message0_.user_id=user1_.id left outer join user_role roles2_ on user1_.id=roles2_.user_id where message0_.id=?
Hibernate: select count(message0_.id) as col_0_0_ from message message0_ left outer join message_likes likes1_ on message0_.id=likes1_.message_id left outer join usr user2_ on likes1_.user_id=user2_.id group by message0_.id

UPD2: I also noticed that when I try to pass in MessageDto (m, ...), instead of m, not the message object is passed, as I need, but the id of this message. Maybe that's why hibernate goes to the database for each message?