make code backwards-compatible with older Python versions

[nominatim.git] / nominatim / typing.py

diff --git a/nominatim/typing.py b/nominatim/typing.py
index 07efc7bade6210114051c7765388cfb165251bc8..d988fe04a3e3d56fb4af801fa4f3cb076c685a4e 100644 (file)
--- a/nominatim/typing.py
+++ b/nominatim/typing.py
@@ -53,7 +53,7 @@ else:
 
 
 # SQLAlchemy introduced generic types in version 2.0 making typing
-# inclompatiple with older versions. Add wrappers here so we don't have
+# incompatible with older versions. Add wrappers here so we don't have
 # to litter the code with bare-string types.
 
 if TYPE_CHECKING:
@@ -63,6 +63,10 @@ else:
     TypeAlias = str
 
 SaSelect: TypeAlias = 'sa.Select[Any]'
+SaScalarSelect: TypeAlias = 'sa.ScalarSelect[Any]'
 SaRow: TypeAlias = 'sa.Row[Any]'
-SaColumn: TypeAlias = 'sa.Column[Any]'
+SaColumn: TypeAlias = 'sa.ColumnElement[Any]'
+SaExpression: TypeAlias = 'sa.ColumnElement[bool]'
 SaLabel: TypeAlias = 'sa.Label[Any]'
+SaFromClause: TypeAlias = 'sa.FromClause'
+SaSelectable: TypeAlias = 'sa.Selectable'