Bulk Metadata update feature

I want to update the metadata field ‘abcd’ for all vectors matching another metadata field value:

Suppose I query for all vectors with filename1 do one by one for each vector id as follows, it takes a long time:

index.update(id=match[‘id’], set_metadata={“abcd”: new_value})

Following doesnt work:
index.update(ids=, set_metadata={“abcd”: new_value})

This also doesnt work:
index.update(ids=, set_metadata=[{“abcd”: new_value} repeated same number of times as ids])

Can either of the approaches above be added as a feature?