1set @save_binlog_checksum= @@global.binlog_checksum; 2set @@global.binlog_checksum = default; 3select @@global.binlog_checksum as 'must be CRC32 by default'; 4must be CRC32 by default 5CRC32 6select @@session.binlog_checksum as 'no session var'; 7ERROR HY000: Variable 'binlog_checksum' is a GLOBAL variable 8set @@global.binlog_checksum = CRC32; 9set @@global.binlog_checksum = CRC32; 10set @@global.master_verify_checksum = 0; 11set @@global.master_verify_checksum = default; 12set @@global.binlog_checksum = ADLER32; 13ERROR 42000: Variable 'binlog_checksum' can't be set to the value of 'ADLER32' 14set @@global.binlog_checksum = @save_binlog_checksum; 15