Hi Vladislav!

i did some initial work, check if i'm going to the right direction:

something todo...

ENUM('Y','N'), i never used... i will try some search at sql_show.cc to get this information

thd->thread_id, thd->query_id, is listener, is waiting

i didn't found information how could i get the thd, or how to know if a thread is the listener, or a thread is waiting

i know that i have the all_groups[].listener to get listener, but i don't know how to check for example if a waiting_threads is the listener or not

about thread waiting, i didn't understand yet where i could check if it's waiting or not

well just first steps, i didn't compiled yet, just write the scratch =)

thanks!!