final public static Database::isActiveConnection()

Flag to indicate a query call should return the prepared statement. File core/lib/Drupal/Core/Database/Database

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

The key of the currently active database connection. Type: string File

final protected static Database::openConnection($key, $target)

Flag to indicate a query call should simply return NULL. This is used for queries that have no reasonable return value anyway, such as INSERT

final public static Database::getLog($logging_key, $key = 'default')

final public static Database::getConnection($target = 'default', $key = NULL)

final public static Database::startLog($logging_key, $key = 'default')

final public static Database::getAllConnectionInfo()