BackupMySql::databaseInfo in core/includes/backup/backup.mysql.inc

Get the version info for the given database.

BackupMySql::query in core/includes/backup/backup.mysql.inc

Run a query on this destination's database using Backdrop's MySQL engine.

BackupMySql::restoreDatabaseFromFile in core/includes/backup/backup.mysql.inc

Backup the databases to a file.