1SET @start_global_value = @@global.max_user_connections; 2SELECT @start_global_value; 3@start_global_value 410 5SET @start_session_value = @@session.max_user_connections; 6SELECT @start_session_value; 7@start_session_value 810 9'#--------------------FN_DYNVARS_087_01-------------------------#' 10SET @@global.max_user_connections = 1000; 11SET @@global.max_user_connections = DEFAULT; 12SELECT @@global.max_user_connections; 13@@global.max_user_connections 140 15SET @@session.max_user_connections = 1000; 16ERROR HY000: SESSION variable 'max_user_connections' is read-only. Use SET GLOBAL to assign the value 17'#--------------------FN_DYNVARS_087_02-------------------------#' 18SET @@global.max_user_connections = DEFAULT; 19SELECT @@global.max_user_connections = 0; 20@@global.max_user_connections = 0 211 22SET @@session.max_user_connections = DEFAULT; 23ERROR HY000: SESSION variable 'max_user_connections' is read-only. Use SET GLOBAL to assign the value 24SELECT @@session.max_user_connections; 25@@session.max_user_connections 260 27'#--------------------FN_DYNVARS_087_03-------------------------#' 28SET @@global.max_user_connections = 1; 29SELECT @@global.max_user_connections; 30@@global.max_user_connections 311 32SET @@global.max_user_connections = 2; 33SELECT @@global.max_user_connections; 34@@global.max_user_connections 352 36SET @@global.max_user_connections = 65536; 37SELECT @@global.max_user_connections; 38@@global.max_user_connections 3965536 40SET @@global.max_user_connections = 2147483647; 41SELECT @@global.max_user_connections; 42@@global.max_user_connections 432147483647 44SET @@global.max_user_connections = 2147483646; 45SELECT @@global.max_user_connections; 46@@global.max_user_connections 472147483646 48'#------------------FN_DYNVARS_087_05-----------------------#' 49SET @@global.max_user_connections = -1024; 50Warnings: 51Warning 1292 Truncated incorrect max_user_connections value: '-1024' 52SELECT @@global.max_user_connections; 53@@global.max_user_connections 54-1 55SET @@global.max_user_connections = 4294967296; 56Warnings: 57Warning 1292 Truncated incorrect max_user_connections value: '4294967296' 58SELECT @@global.max_user_connections; 59@@global.max_user_connections 602147483647 61SET @@global.max_user_connections = -1; 62SELECT @@global.max_user_connections; 63@@global.max_user_connections 64-1 65SET @@global.max_user_connections = 429496729500; 66Warnings: 67Warning 1292 Truncated incorrect max_user_connections value: '429496729500' 68SELECT @@global.max_user_connections; 69@@global.max_user_connections 702147483647 71SET @@global.max_user_connections = 65530.34; 72ERROR 42000: Incorrect argument type to variable 'max_user_connections' 73SELECT @@global.max_user_connections; 74@@global.max_user_connections 752147483647 76SET @@global.max_user_connections = test; 77ERROR 42000: Incorrect argument type to variable 'max_user_connections' 78SELECT @@global.max_user_connections; 79@@global.max_user_connections 802147483647 81'#------------------FN_DYNVARS_087_06-----------------------#' 82SELECT @@global.max_user_connections = VARIABLE_VALUE 83FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 84WHERE VARIABLE_NAME='max_user_connections'; 85@@global.max_user_connections = VARIABLE_VALUE 861 87'#------------------FN_DYNVARS_087_08-----------------------#' 88SET @@global.max_user_connections = TRUE; 89SELECT @@global.max_user_connections; 90@@global.max_user_connections 911 92SET @@global.max_user_connections = FALSE; 93SELECT @@global.max_user_connections; 94@@global.max_user_connections 950 96'#---------------------FN_DYNVARS_087_09----------------------#' 97SET @@global.max_user_connections = 20; 98SELECT @@max_user_connections = @@global.max_user_connections; 99@@max_user_connections = @@global.max_user_connections 1001 101'#---------------------FN_DYNVARS_087_11----------------------#' 102SET @@global.max_user_connections = 102; 103SELECT @@max_user_connections; 104@@max_user_connections 105102 106SELECT local.max_user_connections; 107ERROR 42S02: Unknown table 'local' in field list 108SELECT session.max_user_connections; 109ERROR 42S02: Unknown table 'session' in field list 110SELECT max_user_connections = @@session.max_user_connections; 111ERROR 42S22: Unknown column 'max_user_connections' in 'field list' 112SET @@global.max_user_connections = @start_global_value; 113SELECT @@global.max_user_connections; 114@@global.max_user_connections 11510 116