https://mariadb.com/docs/server/server-usage/storage-engines/federatedx-storage-engine/about-federatedx
About FederatedX | Server | MariaDB Documentation
An introduction to the FederatedX storage engine, a fork of MySQL's Federated engine, allowing access to remote tables as if they were local. This storage...
servermariadbdocumentation
https://jira.mariadb.org/browse/MDEV-10617
[MDEV-10617] federated.federatedx, federated.federated_innodb, federated.federated_transactions...
mdevfederatedinnodbtransactions