V$MVREFRESH

Contains information about the materialized views currently being refreshed.

Column	Datatype	Description
SID	NUMBER	Session identifier.
SERIAL#	NUMBER	Session serial number, which is used to identify uniquely a session's objects. Guarantees that session-level commands are applied to the correct session objects if the session ends and another session begins with the same session ID.
CURRMVOWNER	VARCHAR2(31)	Owner of the materialized view currently being refreshed. The materialized view resides in this user's schema.
CURRMVNAME	VARCHAR2(31)	Name of the materialized view currently being refreshed.