The difference between now and sysdate in MySQL

MySQL now gets the time of SQL execution, Sysdate gets the system time

Errors can result from inconsistent time in master and slave master and slave processes

For example:

Unsafe statement written to the binary log using statement format since Binlog_format = statement. Statement is unsafe because it uses a system function, that could return a different value on the slave.

Workaround:

1, fix this problem.

2, do not use the statement statement-level replication, but similar to Oracle, the data changes are recorded, as is done in the standby library.

The second way is the familiar, Binlog_format=row way. The first is that now () does not use the machine system time, but instead takes the MySQL variable "TIMESTAMP" value.

Other similar variables include insert_id (for copying, auto_increment value), etc.

The difference between now and sysdate in MySQL