string(25) "MDB2 Error: unknown error" int(-1) string(240) "_doQuery: [Error message: Could not execute statement] [Last executed query: EXECUTE MDB2_STATEMENT_mysql_c3357ce3b32ebc9ae92be98011853bda USING @0, @1, @2] [Native code: 2013] [Native message: Lost connection to MySQL server during query] " string(25) "MDB2 Error: unknown error" int(-1) string(178) "_doQuery: [Error message: Could not execute statement] [Last executed query: SELECT * FROM `pref` ORDER BY sort] [Native code: 2006] [Native message: MySQL server has gone away] " string(25) "MDB2 Error: unknown error" int(-1) string(502) "_doQuery: [Error message: Could not execute statement] [Last executed query: PREPARE MDB2_STATEMENT_mysql_1384d933d15616edafc2a86e5ef14832 FROM 'SELECT o.*,s.*, sp.pref_code FROM `office` o LEFT JOIN office_site s ON o.office_id=s.office_id LEFT JOIN (SELECT * FROM office_site_pref WHERE site_code = ? GROUP BY office_id) sp ON o.office_id=sp.office_id WHERE s.site_code= ? AND o.is_delete = 0 AND o.office_id = ? AND s.status != -1'] [Native code: 2006] [Native message: MySQL server has gone away] "