Empty float_vector field

float_vector field for some records became empty (at all).
How to find such records?
LENGTH(embedding) is not working, (select * from my_table where LENGTH(embedding)=0)
comparison of embedding field with null is not working two (select * from my_table where embedding is null)

So, is it possible to filter all such records with empty float_vector ?
Thank you.

seems there is no such thing
it could be better to create ticket at GitHub with feature request for that

GitHub feature ticket created Checking empty float_vector fields via SQL · Issue #3774 · manticoresoftware/manticoresearch · GitHub