You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near innobackupex --user=root --password=123com datamysqldata tmpdata a

This error message suggests that there is a syntax error in the SQL command you are trying to execute, specifically with the use of the "innobackupex" command. It seems that you may be trying to execute a backup command using the "innobackupex" tool, but it is not recognized by MySQL.

To resolve this error, you may need to check the syntax of the command you are using and ensure that it is compatible with your version of MySQL. Additionally, you may need to check that the "innobackupex" tool is installed and properly configured on your system.

If you are still having trouble, it may be helpful to consult the MySQL documentation or seek assistance from a qualified MySQL administrator or developer