Improve types of lowecase table, column and values (#162)

fixes #161

Author: CaselIT

sqlalchemy-stubs/sql/selectable.pyi

@@ -28,13 +28,13 @@ from .base import ImmutableColumnCollection
 from .elements import BindParameter
 from .elements import BooleanClauseList
 from .elements import ClauseElement
+from .elements import ColumnClause
 from .elements import ColumnElement
 from .elements import GroupedElement
 from .elements import Grouping
 from .elements import Label
 from .elements import TableValuedColumn
 from .elements import UnaryExpression
-from .schema import Column
 from .schema import ForeignKey
 from .schema import Table
 from .. import util
@@ -78,8 +78,8 @@ class Selectable(ReturnsRows):
     def lateral(self, name: Optional[str] = ...) -> Lateral: ...
     def replace_selectable(self: _S, old: Any, alias: Any) -> _S: ...
     def corresponding_column(
-        self, column: Column[Any], require_embedded: bool = ...
-    ) -> Optional[Column[Any]]: ...
+        self, column: ColumnElement[Any], require_embedded: bool = ...
+    ) -> Optional[ColumnElement[Any]]: ...
 
 class HasPrefixes:
     def prefix_with(self: _HP, *expr: Any, **kw: Any) -> _HP: ...
@@ -298,11 +298,11 @@ class TableClause(roles.DMLTableRole, Immutable, FromClause):
     schema: Any = ...
     _autoincrement_column: None = ...
     def __init__(
-        self, name: str, *columns: Column[Any], **kw: Any
+        self, name: str, *columns: ColumnClause[Any], **kw: Any
     ) -> None: ...
     @util.memoized_property
     def description(self) -> util.text_type: ...  # type: ignore[override]
-    def append_column(self, c: Column[Any], **kw: Any) -> None: ...
+    def append_column(self, c: ColumnClause[Any], **kw: Any) -> None: ...
     def insert(
         self, values: Optional[Any] = ..., inline: bool = ..., **kwargs: Any
     ) -> dml.Insert: ...
@@ -340,7 +340,7 @@ class Values(Generative, FromClause):
     __visit_name__: str = ...
     name: Any = ...
     literal_binds: Any = ...
-    def __init__(self, *columns: Column[Any], **kw: Any) -> None: ...
+    def __init__(self, *columns: ColumnClause[Any], **kw: Any) -> None: ...
     def alias(self: _VA, name: Any, **kw: Any) -> _VA: ...  # type: ignore[override]
     def lateral(self: _VA, name: Optional[Any] = ...) -> _VA: ...  # type: ignore[override]
     def data(self: _VA, values: Any) -> _VA: ...

test/files/lowercase_objects.py

@@ -0,0 +1,13 @@
+import sqlalchemy as sa
+
+Book = sa.table(
+    "book",
+    sa.column("id", sa.Integer),
+    sa.column("name", sa.String),
+)
+Book.append_column(sa.column("other"))
+Book.corresponding_column(Book.c.id)
+
+value_expr = sa.values(
+    sa.column("id", sa.Integer), sa.column("name", sa.String), name="my_values"
+).data([(1, "name1"), (2, "name2"), (3, "name3")])