An nested array of all active connections. It is keyed by database name and target. Type:

final public static Database::setMultipleConnectionInfo(array $databases)

A processed copy of the database connection information from settings.php. Type:

Flag to indicate a query call should return the number of affected rows. File core/lib/Drupal/Core/Database/Database

An array of active query log objects. Every connection has one and only one logger object for all targets and logging keys.

public static Database::convertDbUrlToConnectionInfo($url, $root)

Flag to indicate a query call should return the "last insert id". File core/lib/Drupal/Core/Database/Database

final public static Database::renameConnection($old_key, $new_key)

final public static Database::setActiveConnection($key = 'default')

final public static Database::isActiveConnection()