diff --git a/CHANGES.md b/CHANGES.md
index 80034604..1aabfd20 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/).
 
 Note: Minor version `0.X.0` update might break the API, It's recommended to pin `tipg` to minor version: `tipg>=0.1,<0.2`
 
+## [unreleased]
+
+- add `py.typed` file
+
 ## [0.4.4] - 2023-10-03
 
 ### fixed
diff --git a/tests/conftest.py b/tests/conftest.py
index bee9acc7..1c74129c 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -181,11 +181,11 @@ def app(database_url, monkeypatch):
 
 @pytest.fixture
 def app_excludes(database_url, monkeypatch):
-    """Create APP with but excludes `public.nongeo_data` table."""
+    """Create APP with but excludes `public.nongeo_data` and `public.minnesota` tables."""
     postgres_settings = PostgresSettings(database_url=database_url)
     db_settings = DatabaseSettings(
         schemas=["public"],
-        exclude_tables=["public.nongeo_data"],
+        exclude_tables=["public.nongeo_data", "public.minnesota"],
         functions=[],
         only_spatial_tables=False,
     )
@@ -203,11 +203,11 @@ def app_excludes(database_url, monkeypatch):
 
 @pytest.fixture
 def app_includes(database_url, monkeypatch):
-    """Create APP with only `public.nongeo_data` table."""
+    """Create APP with only `public.nongeo_data` and `public.minnesota` table."""
     postgres_settings = PostgresSettings(database_url=database_url)
     db_settings = DatabaseSettings(
         schemas=["public"],
-        tables=["public.nongeo_data"],
+        tables=["public.nongeo_data", "public.minnesota"],
         functions=[],
         only_spatial_tables=False,
     )
@@ -223,6 +223,69 @@ def app_includes(database_url, monkeypatch):
         yield client
 
 
+@pytest.fixture
+def app_excludes_function(database_url, monkeypatch):
+    """Create APP with but excludes `pg_temp.squares` and `public.st_squaregrid` functions."""
+    postgres_settings = PostgresSettings(database_url=database_url)
+    db_settings = DatabaseSettings(
+        schemas=["public"],
+        tables=[],
+        exclude_functions=["pg_temp.squares", "public.st_squaregrid"],
+    )
+    sql_settings = CustomSQLSettings(custom_sql_directory=SQL_FUNCTIONS_DIRECTORY)
+
+    app = create_tipg_app(
+        postgres_settings=postgres_settings,
+        db_settings=db_settings,
+        sql_settings=sql_settings,
+    )
+
+    with TestClient(app) as client:
+        yield client
+
+
+@pytest.fixture
+def app_includes_function(database_url, monkeypatch):
+    """Create APP with only `public.nongeo_data` table."""
+    postgres_settings = PostgresSettings(database_url=database_url)
+    db_settings = DatabaseSettings(
+        schemas=[],
+        tables=[],
+        functions=["pg_temp.hexagons"],
+    )
+    sql_settings = CustomSQLSettings(custom_sql_directory=SQL_FUNCTIONS_DIRECTORY)
+
+    app = create_tipg_app(
+        postgres_settings=postgres_settings,
+        db_settings=db_settings,
+        sql_settings=sql_settings,
+    )
+
+    with TestClient(app) as client:
+        yield client
+
+
+@pytest.fixture
+def app_empty(database_url, monkeypatch):
+    """Create APP with only no table nor function."""
+    postgres_settings = PostgresSettings(database_url=database_url)
+    db_settings = DatabaseSettings(
+        schemas=[],
+        tables=[],
+        functions=[],
+    )
+    sql_settings = CustomSQLSettings(custom_sql_directory=SQL_FUNCTIONS_DIRECTORY)
+
+    app = create_tipg_app(
+        postgres_settings=postgres_settings,
+        db_settings=db_settings,
+        sql_settings=sql_settings,
+    )
+
+    with TestClient(app) as client:
+        yield client
+
+
 @pytest.fixture
 def app_myschema(database_url):
     """Create APP with only tables from `myschema` schema and no function schema.
diff --git a/tests/routes/test_collections.py b/tests/routes/test_collections.py
index 649bb6bc..74c037e9 100644
--- a/tests/routes/test_collections.py
+++ b/tests/routes/test_collections.py
@@ -132,6 +132,7 @@ def test_collections_excludes(app_excludes):
     ids = [x["id"] for x in body["collections"]]
     assert "public.my_data" in ids
     assert "public.nongeo_data" not in ids
+    assert "public.minnesota" not in ids
 
 
 def test_collections_includes(app_includes):
@@ -140,7 +141,7 @@ def test_collections_includes(app_includes):
     assert response.status_code == 200
     body = response.json()
     ids = [x["id"] for x in body["collections"]]
-    assert ["public.nongeo_data"] == ids
+    assert ["public.minnesota", "public.nongeo_data"] == ids
 
 
 def test_collections_landsat(app):
@@ -252,3 +253,31 @@ def test_collections_type_filter(app):
 
     # Functions
     assert "public.st_squaregrid" not in ids
+
+
+def test_collections_exclude_functions(app_excludes_function):
+    """Test /collections endpoint."""
+    response = app_excludes_function.get("/collections")
+    assert response.status_code == 200
+    body = response.json()
+    ids = [x["id"] for x in body["collections"]]
+    assert "pg_temp.hexagons" in ids
+    assert "pg_temp.squares" not in ids
+    assert "public.st_squaregrid" not in ids
+
+
+def test_collections_include_functions(app_includes_function):
+    """Test /collections endpoint."""
+    response = app_includes_function.get("/collections")
+    assert response.status_code == 200
+    body = response.json()
+    ids = [x["id"] for x in body["collections"]]
+    assert ["pg_temp.hexagons", "pg_temp.squares"] == ids
+
+
+def test_collections_empty(app_empty):
+    """Test /collections endpoint."""
+    response = app_empty.get("/collections")
+    assert response.status_code == 200
+    body = response.json()
+    assert not body["collections"]
diff --git a/tipg/py.typed b/tipg/py.typed
new file mode 100644
index 00000000..e69de29b
diff --git a/tipg/sql/dbcatalog.sql b/tipg/sql/dbcatalog.sql
index 651d42ee..bf230312 100644
--- a/tipg/sql/dbcatalog.sql
+++ b/tipg/sql/dbcatalog.sql
@@ -246,10 +246,11 @@ CREATE OR REPLACE FUNCTION pg_temp.tipg_catalog(
             AND relkind IN ('r','v', 'm', 'f', 'p')
             AND has_table_privilege(c.oid, 'SELECT')
             AND c.relname::text NOT IN ('spatial_ref_sys','geometry_columns','geography_columns')
-            AND (exclude_tables IS NULL OR concat(c.relnamespace::regnamespace::text,'.',c.relname::text) != ANY (exclude_tables))
+            AND (exclude_tables IS NULL OR concat(c.relnamespace::regnamespace::text,'.',c.relname::text) <> ALL (exclude_tables))
             AND (tables IS NULL OR concat(c.relnamespace::regnamespace::text,'.',c.relname::text) = ANY (tables))
 
         UNION ALL
+
         SELECT
             pg_temp.tipg_fproperties(p) as meta
         FROM
@@ -262,8 +263,8 @@ CREATE OR REPLACE FUNCTION pg_temp.tipg_catalog(
             AND '' != ANY(proargnames)
             AND has_function_privilege(oid, 'execute')
             AND provariadic=0
-            AND (functions IS NULL OR concat(p.pronamespace::regnamespace::text, '.', proname::text) = ANY (functions))
-            AND (exclude_functions IS NULL OR concat(p.pronamespace::regnamespace::text,'.',proname::text) != ANY (exclude_functions))
+            AND (exclude_functions IS NULL OR concat(p.pronamespace::regnamespace::text,'.',proname::text) <> ALL (exclude_functions))
+            AND (functions IS NULL OR concat(p.pronamespace::regnamespace::text,'.',proname::text) = ANY (functions))
             AND p.proname::text NOT ILIKE 'tipg_%'
     )
     SELECT meta FROM a