Data type for Float column should be float, not Decimal

sqlalchemy-stubs/sql/sqltypes.pyi

@@ -95,16 +95,19 @@ class Numeric(_LookupExpressionAdapter, TypeEngine[decimal.Decimal]):
     def result_processor(self, dialect: Dialect, coltype: Any) -> Optional[Callable[[Optional[Any]],
                                                                                     Optional[Union[float, decimal.Decimal]]]]: ...
 
-class Float(Numeric):
+class Float(_LookupExpressionAdapter, TypeEngine[float]):
     __visit_name__: str = ...
-    scale: Optional[int] = ...
     precision: Optional[int] = ...
-    asdecimal: bool = ...
+    scale: Optional[int] = ...
     decimal_return_scale: Optional[int] = ...
+    asdecimal: bool = ...
     def __init__(self, precision: Optional[int] = ..., asdecimal: bool = ...,
                  decimal_return_scale: Optional[int] = ..., **kwargs: Any) -> None: ...
-    def result_processor(self, dialect: Dialect, coltype: Any) -> Optional[Callable[[Optional[Any]],
-                                                                                    Optional[Union[float, decimal.Decimal]]]]: ...
+    def literal_processor(self, dialect: Dialect) -> Callable[[float], str]: ...
+    @property
+    def python_type(self) -> Type[float]: ...
+    def bind_processor(self, dialect: Dialect) -> Optional[Callable[[Optional[str]], float]]: ...
+    def result_processor(self, dialect: Dialect, coltype: Any) -> Optional[Callable[[Optional[Any]], Optional[float]]]: ...
 
 class DateTime(_LookupExpressionAdapter, TypeEngine[datetime]):
     __visit_name__: str = ...

test/test-data/sqlalchemy-sql-sqltypes.test

@@ -36,3 +36,23 @@ main:6: error: No overload variant of "UnicodeText" matches argument types "int"
 main:6: note: Possible overload variants:
 main:6: note:     def __init__(self, length: Optional[int] = ..., collation: Optional[str] = ..., convert_unicode: bool = ..., _warn_on_bytestring: bool = ...) -> UnicodeText
 main:6: note:     def __init__(self, length: Optional[int] = ..., collation: Optional[str] = ..., convert_unicode: str = ..., unicode_error: Optional[str] = ..., _warn_on_bytestring: bool = ...) -> UnicodeText
+
+[case testFloatAndDecimal]
+from decimal import Decimal
+from sqlalchemy import Column, Float, Numeric, Integer
+from sqlalchemy.ext.declarative import declarative_base
+
+Base = declarative_base()
+
+class Numbers(Base):
+    __tablename__ = "numbers"
+    id_ = Column(Integer, primary_key=True)
+
+    c_numeric = Column(Numeric, nullable=False)
+    c_float = Column(Float, nullable=False)
+
+numbers_float = Numbers(c_numeric=1.0, c_float=1.0)
+numbers_decimal = Numbers(c_numeric=Decimal(1.0), c_float=Decimal(1.0))
+[out]
+main:14: error: Incompatible type for "c_numeric" of "Numbers" (got "float", expected "Decimal")
+main:15: error: Incompatible type for "c_float" of "Numbers" (got "Decimal", expected "float")