Whether debug listeners need to be attached on pool.
Depending on value of this param, following actions will be taken:
* undefined | false - debug listeners won't be attached
* true - debug listeners will be attached for all DebuggableEventType
Configure client with pooled connections.
Configure client with pool cluster connections.
Queries to be executed after connection establishment in order to set session variables.
Options needed for MySQL client initialization.
MySQLClientOptions.pool and MySQLClientOptions.poolCluster are mutually exclusive options.