MySQL Shell 9.0
The shell global object is extended with
register_Sql_Handler, a function which enables
you to register a custom SQL handler. This handler can execute
pre-processing steps for the given SQL statements and extend the
supported SQL statements with non-standard SQL.
The SQL handler detects SQL statements executed in one of the following ways:
Using the \sql command
SQL mode.
The runSQL function in session objects.
Using the --execute/-e command line option.
Using the --file/-f command line option.