ConnectToDB sets up a new connection to the specified database.

ConnectToServer connects to the clickhouse server as the default user.

GetFlatDatabaseList returns a list of database names from a list of ImportDatabase structs.

GetRollingStatus gets the rolling status of a database.

NewBulkWriter creates a new writer object to write output data to collections.

SetUpNewImport creates the database requested for this import and returns a new DB struct for connection to said database.

DB is the workhorse container for messing with the database.