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L1 distance support for sqlalchemy and sqlmodel #69

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Merged
ankane merged 1 commit into from
May 16, 2024
Merged

L1 distance support for sqlalchemy and sqlmodel #69

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3 changes: 3 additions & 0 deletions pgvector/sqlalchemy/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,9 @@ class comparator_factory(UserDefinedType.Comparator):
def l2_distance(self, other):
return self.op('<->', return_type=Float)(other)

def l1_distance(self, other):
return self.op('<+>', return_type=Float)(other)

def max_inner_product(self, other):
return self.op('<#>', return_type=Float)(other)

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12 changes: 12 additions & 0 deletions tests/test_sqlalchemy.py
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Expand Up @@ -119,6 +119,18 @@ def test_l2_distance_orm(self):
items = session.scalars(select(Item).order_by(Item.embedding.l2_distance([1, 1, 1])))
assert [v.id for v in items] == [1, 3, 2]

def test_l1_distance(self):
create_items()
with Session(engine) as session:
items = session.query(Item).order_by(Item.embedding.l1_distance([1, 1, 2])).all()
assert [v.id for v in items] == [3, 1, 2]

def test_l1_distance_orm(self):
create_items()
with Session(engine) as session:
items = session.scalars(select(Item).order_by(Item.embedding.l1_distance([1, 1, 2])))
assert [v.id for v in items] == [3, 1, 2]

def test_max_inner_product(self):
create_items()
with Session(engine) as session:
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6 changes: 6 additions & 0 deletions tests/test_sqlmodel.py
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Expand Up @@ -79,6 +79,12 @@ def test_l2_distance(self):
items = session.exec(select(Item).order_by(Item.embedding.l2_distance([1, 1, 1])))
assert [v.id for v in items] == [1, 3, 2]

def test_l1_distance(self):
create_items()
with Session(engine) as session:
items = session.exec(select(Item).order_by(Item.embedding.l1_distance([1, 1, 1])))
assert [v.id for v in items] == [1, 3, 2]

def test_max_inner_product(self):
create_items()
with Session(engine) as session:
Expand Down