[bug]:[COSINE] metric_type cosine, GetVectorByIds returns the original vector, not normalized

[elstic]

metric_type: COSINE

_, result_ids = knowhere.DataSetToArray(ans)
ids = knowhere.ArrayToDataSet(result_ids[2])
result, _ = idx.GetVectorByIds(ids, build_cfg)
raw_vec = knowhere.GetVectorDataSetToArray(result)
degraded += utils.verify_raw_vector(raw_vec, train_vec, result_ids[2])

[elstic]

/assign @cydrain

[Cai Yudong]

which index type ? @elstic

[elstic]

which index type ? @elstic

HNSW 、IVF_FLAT

[Xiaofan]

@elstic we are expecting for original index right?

[Cai Yudong]

which index type ? @elstic

HNSW 、IVF_FLAT

it's impossible, please check if the original dataset is already normalized.

[elstic]

@elstic we are expecting for original index right?

Currently metric_type cosine does not support GetVectorByIds, @cydrain support and then return to verify the test here

[Cai Yudong]

HNSW + COSINE can support GetVectorByIds now, but IVF_FLAT still not.
please re-test this case.
@elstic

[elstic]

HNSW + COSINE can support GetVectorByIds now, but IVF_FLAT still not. please re-test this case. @elstic

Verified and fixed .