Add trigonometric functions to sqlite backend

issue9996
review333731002

CHANGELOG

@@ -1,3 +1,4 @@
+* Add trigonometric functions to sqlite backend
 * Allow skipping user warnings globally
 * Add validate option to trytond-admin
 * Refresh pool of other processes

trytond/backend/sqlite/database.py

@@ -375,6 +375,17 @@ class Database(DatabaseInterface):
         self._conn.create_function('trunc', 1, math.trunc)
         self._conn.create_function('trunc', 2, trunc)
 
+        # Trigonomentric functions
+        self._conn.create_function('acos', 1, math.acos)
+        self._conn.create_function('asin', 1, math.asin)
+        self._conn.create_function('atan', 1, math.atan)
+        self._conn.create_function('atan2', 2, math.atan2)
+        self._conn.create_function('cos', 1, math.cos)
+        self._conn.create_function(
+            'cot', 1, lambda x: 1 / math.tan(x) if x else math.inf)
+        self._conn.create_function('sin', 1, math.sin)
+        self._conn.create_function('tan', 1, math.tan)
+
         # Random functions
         self._conn.create_function('random', 0, random.random)
         self._conn.create_function('setseed', 1, random.seed)

trytond/tests/test_backend.py

@@ -110,6 +110,15 @@ class BackendTestCase(unittest.TestCase):
             (functions.Sqrt(2.), 1.4142135623731),
             (functions.Trunc(42.8), 42),
             (functions.Trunc(42.4348, 2), 42.43),
+            (functions.Acos(0.5), 1.0471975511965979),
+            (functions.Asin(0.5), 0.5235987755982989),
+            (functions.Atan(0.5), 0.4636476090008061),
+            (functions.Atan2(0.5, 0.5), 0.7853981633974483),
+            (functions.Cos(1), 0.5403023058681398),
+            (functions.Cot(0), math.inf),
+            (functions.Cot(1), 0.6420926159343306),
+            (functions.Sin(1), 0.8414709848078965),
+            (functions.Tan(1), 1.5574077246549023),
             (functions.CharLength('jose'), 4),
             (functions.Lower('TOM'), 'tom'),
             (functions.Overlay('Txxxxas', 'hom', 2, 4), 'Thomas'),