The difference between now and sysdate in mysql

In mysql, now gets the execution time of sql, and sysdate gets the system time.

In the master-slave process of master and slave, it will lead to time inconsistency and error reporting.

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 may return a different value on the slave.

Solution:

1. Fix this problem.

2. Instead of using the statement-level replication of statement, but similar to oracle, record the data changes and execute them in the standby database as is.

The second way is the well-known way of binlog_format=ROW. The first is that now () does not use machine system time, but takes the variable "TIMESTAMP" value of mysql.

Other similar variables include insert_id (the value of AUTO_INCREMENT for replication), and so on.