# must return0, 6
SELECT SUM(ISNULL(ATTR_VALUE)), COUNT(*)
FROM performance_schema.session_connect_attrs
WHERE ATTR_NAME IN ('_os', '_client_name', '_pid', '_client_version', '_platform', 'program_name') AND PROCESSLIST_ID = CONNECTION_ID();
SUM(ISNULL(ATTR_VALUE)) COUNT(*) 06
# must return1
SELECT COUNT(DISTINCT PROCESSLIST_ID)
FROM performance_schema.session_connect_attrs;
COUNT(DISTINCT PROCESSLIST_ID) 1
# must return0, 6
SELECT SUM(ISNULL(ATTR_VALUE)), COUNT(*)
FROM performance_schema.session_account_connect_attrs
WHERE ATTR_NAME IN ('_os', '_client_name', '_pid', '_client_version', '_platform', 'program_name') AND PROCESSLIST_ID = CONNECTION_ID();
SUM(ISNULL(ATTR_VALUE)) COUNT(*) 06
# must return1
SELECT COUNT(DISTINCT PROCESSLIST_ID)
FROM performance_schema.session_account_connect_attrs;
COUNT(DISTINCT PROCESSLIST_ID) 1
CREATE USER wl5924@localhost;
connect non_privileged_user,localhost,wl5924,,"*NO-ONE*";
connection default;
# must return1
SELECT COUNT(DISTINCT PROCESSLIST_ID)
FROM performance_schema.session_account_connect_attrs;
COUNT(DISTINCT PROCESSLIST_ID) 1
# must return2
SELECT COUNT(DISTINCT PROCESSLIST_ID)
FROM performance_schema.session_connect_attrs;
COUNT(DISTINCT PROCESSLIST_ID) 2
connection non_privileged_user;
# must return1
SELECT COUNT(DISTINCT PROCESSLIST_ID)
FROM performance_schema.session_account_connect_attrs;
COUNT(DISTINCT PROCESSLIST_ID) 1
SELECT COUNT(DISTINCT PROCESSLIST_ID)
FROM performance_schema.session_connect_attrs; ERROR42000: SELECT command denied to user 'wl5924'@'localhost' for table `performance_schema`.`session_connect_attrs`
connection default;
disconnect non_privileged_user;
grant select on performance_schema.* to wl5924@localhost;
change_user wl5924,,;
SELECT SUM(ISNULL(ATTR_VALUE)), COUNT(*)
FROM performance_schema.session_account_connect_attrs
WHERE ATTR_NAME IN ('_os', '_client_name', '_pid', '_client_version', '_platform', 'program_name') AND PROCESSLIST_ID = CONNECTION_ID();
SUM(ISNULL(ATTR_VALUE)) COUNT(*) 06
change_user root,,test;
DROP USER wl5924@localhost;
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-10-08)
¤
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