print =============== create user and loginsql create user sysinfo0 pass 'taosdata'sql create user sysinfo1 pass 'taosdata'sql alter user sysinfo0 sysinfo 0sql alter user sysinfo1 sysinfo 1print user sysinfo0 loginsql closesql connect sysinfo0system sh/exec.sh -n dnode1 -s stopreturnprint =============== check opersql_error create user u1 pass 'u1'sql_error drop user sysinfo1sql_error alter user sysinfo1 pass '1'sql_error alter user sysinfo0 pass '1'