When using ColumnStore, MariaDB Server creates a series of system databases used for operational purposes.
| Database | Description |
|---|---|
calpontsys |
Database maintains table metadata about ColumnStore tables. |
infinidb_querystats |
Database maintains information about query performance. For more information, see Query Analysis. |
infinidb_vtable |
Database used in creation of temporary tables in query execution. Users executing ColumnStore queries must have CREATE TEMPORARY TABLE privilege on this database. For more information, see User Management. |
columnstore_info |
Database for stored procedures used to retrieve information about ColumnStore usage. For more information, see the ColumnStore Information Schema tables. |
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https://mariadb.com/kb/en/columnstore-system-databases/