An Error Was Encountered

Error Number: 2006

MySQL server has gone away

SELECT alp_act_ascents.id AS `ascid`, alp_act_ascents.page_id AS `ascpage_id`, alp_act_ascents.position, alp_act_ascents.champ_id, alp_act_ascents.final, alp_act_ascents.odate AS `date`, CONCAT(alp_clients.surname, ' ', alp_clients.name) AS chief, alp_clients.sex, alp_clients.birthday, fc.real_name AS `critique`, fr.real_name AS `report`, alp_routes.num, alp_routes.toponym, alp_routes.track, alp_hardship.name AS `hardship`, alp_route_style.style, alp_routes.pioneer, alp_routes.openyear, alp_routes.height, alp_hardship.id AS `hardid`, alp_act_ascents.pioneer AS `fresh` FROM alp_act_ascents INNER JOIN alp_routes ON alp_act_ascents.route = alp_routes.id LEFT OUTER JOIN alp_asc_parties ON alp_asc_parties.host_element_id = alp_act_ascents.id AND alp_asc_parties.chief = true LEFT OUTER JOIN alp_clients ON alp_asc_parties.party = alp_clients.id LEFT OUTER JOIN alp_accidents ON alp_accidents.host_element_id = alp_act_ascents.id LEFT OUTER JOIN alp_files fr ON alp_act_ascents.report = fr.id LEFT OUTER JOIN alp_files fc ON alp_accidents.critique = fc.id INNER JOIN alp_hardship ON alp_routes.hardship = alp_hardship.id INNER JOIN alp_route_style ON alp_routes.style = alp_route_style.id LEFT OUTER JOIN alp_arrangements ON alp_act_ascents.action = alp_arrangements.id WHERE EXISTS (SELECT * FROM alp_asc_parties WHERE alp_asc_parties.party = 237 AND alp_asc_parties.host_element_id = alp_act_ascents.id AND (alp_asc_parties.common = true OR alp_asc_parties.chief = true)) AND alp_arrangements.year = 23 AND alp_act_ascents.hidden = 0 ORDER BY alp_act_ascents.date, alp_act_ascents.champ_id;