ALTER MATERIALIZED VIEW LOG [ FORCE ] ON [ schema. ]table [ physical_attributes_clause | add_mv_log_column_clause | alter_table_partitioning | parallel_clause | logging_clause | allocate_extent_clause | shrink_clause | move_mv_log_clause | { CACHE | NOCACHE } ] [ mv_log_augmentation ] [ mv_log_purge_clause ] [ for_refresh_clause ] ;