In the teiid_rel namespace several new properties for materialized views have been added:

MATVIEW_LOADNUMBER_COLUMN - references a column name on the materialization target table. Introduced with TEIID-4641 to offer more flexibility in refresh beyond swapping

MATVIEW_WRITE_THROUGH - a boolean to denote whether updates against the view should also write into materialization target as well. Introduced with TEIID-3952

There may be more related to the status table and debezium integration.