I am trying to create an ANN index that uses inner product as the similarity function. As far as I can see, the support for this has been implemented (#144). However, I have not found a value for
knn.space_type that is accepted. The documentation here doesn’t seem to list inner product.
For whatever value of
knn.space_type I give, I am constantly getting
RequestError(400, 'invalid_parameter_exception', 'Unsupported space type: inner_product')
Any help would be greatly appreciated!