added support for func by name for $lb

sqlalchemy_iris/types.py

@@ -1,5 +1,6 @@
 import datetime
 from decimal import Decimal
+from sqlalchemy import func
 from sqlalchemy.sql import sqltypes
 from sqlalchemy.types import UserDefinedType
 from uuid import UUID as _python_UUID
@@ -236,6 +237,15 @@ def process(value):
 
         return process
 
+    class comparator_factory(UserDefinedType.Comparator):
+        def func(self, funcname: str, other):
+            if not isinstance(other, list) and not isinstance(other, tuple):
+                raise ValueError("expected list or tuple, got '%s'" % type(other))
+            irislist = IRISList()
+            for item in other:
+                irislist.add(item)
+            return getattr(func, funcname)(self, irislist.getBuffer())
+
 
 class BIT(sqltypes.TypeEngine):
     __visit_name__ = "BIT"

tests/test_suite.py

@@ -321,3 +321,19 @@ def test_listbuild(self):
                 (None,),
             ],
         )
+        self._assert_result(
+            select(self.tables.data).where(self.tables.data.c.val == [1.0] * 50),
+            [
+                ([1.0] * 50,),
+            ],
+        )
+
+        self._assert_result(
+            select(
+                self.tables.data,
+                self.tables.data.c.val.func("$listsame", [1.0] * 50).label("same"),
+            ).limit(1),
+            [
+                ([1.0] * 50, 1),
+            ],
+        )