sqlalchemy.dialects.oracle.FLOAT

class documentation

class FLOAT(sqltypes.FLOAT): (source)

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Oracle FLOAT. This is the same as :class:`_sqltypes.FLOAT` except that an Oracle-specific :paramref:`_oracle.FLOAT.binary_precision` parameter is accepted, and the :paramref:`_sqltypes.Float.precision` parameter is not accepted. Oracle FLOAT types indicate precision in terms of "binary precision", which defaults to 126. For a REAL type, the value is 63. This parameter does not cleanly map to a specific number of decimal places but is roughly equivalent to the desired number of decimal places divided by 0.3103. .. versionadded:: 2.0

Method __init__ Construct a FLOAT
Class Variable __visit_name__ Undocumented
Instance Variable binary_precision Undocumented

Inherited from Float (via FLOAT):

Method result_processor Return a conversion function for processing result row values.
Class Variable scale Undocumented
Instance Variable asdecimal Undocumented
Instance Variable decimal_return_scale Undocumented
Instance Variable precision Undocumented

Inherited from Numeric (via FLOAT, Float):

Method bind_processor Return a conversion function for processing bind values.
Method get_dbapi_type Return the corresponding type object from the underlying DB-API, if any.
Method literal_processor Return a conversion function for processing literal values that are to be rendered directly without using binds.
Property python_type Return the Python type object expected to be returned by instances of this type, if known.
Class Variable _default_decimal_return_scale Undocumented
Property _effective_decimal_return_scale Undocumented
Property _expression_adaptations Undocumented
Property _type_affinity Return a rudimental 'affinity' value expressing the general class of type.

Inherited from HasExpressionLookup (via FLOAT, Float, Numeric):

Class Comparator Undocumented

Inherited from TypeEngineMixin (via FLOAT, Float, Numeric, HasExpressionLookup):

Method adapt Undocumented
Method dialect_impl Undocumented
Class Variable __slots__ Undocumented
Property _static_cache_key Undocumented

Inherited from TypeEngine (via FLOAT, Float, Numeric, HasExpressionLookup, TypeEngineMixin):

Method __repr__ Undocumented
Method __str__ Undocumented
Method as_generic Return an instance of the generic type corresponding to this type using heuristic rule. The method may be overridden if this heuristic rule is not sufficient.
Method bind_expression Given a bind value (i.e. a :class:`.BindParameter` instance), return a SQL expression in its place.
Method coerce_compared_value Suggest a type for a 'coerced' Python value in an expression.
Method column_expression Given a SELECT column expression, return a wrapping SQL expression.
Method compare_against_backend Compare this type against the given backend type.
Method compare_values Compare two values for equality.
Method compile Produce a string-compiled form of this :class:`.TypeEngine`.
Method copy Undocumented
Method copy_value Undocumented
Method evaluates_none Return a copy of this type which has the :attr:`.should_evaluate_none` flag set to True.
Method with_variant Produce a copy of this type object that will utilize the given type when applied to the dialect of the given name.
Class Variable hashable Flag, if False, means values from this type aren't hashable.
Class Variable render_bind_cast Render bind casts for :attr:`.BindTyping.RENDER_CASTS` mode.
Class Variable render_literal_cast render casts when rendering a value as an inline literal, e.g. with :meth:`.TypeEngine.literal_processor`.
Class Variable should_evaluate_none If True, the Python constant ``None`` is considered to be handled explicitly by this type.
Class Variable sort_key_function A sorting function that can be passed as the key to sorted.
Static Method _to_instance Undocumented
Method _cached_bind_processor Return a dialect-specific bind processor for this type.
Method _cached_custom_processor return a dialect-specific processing object for custom purposes.
Method _cached_literal_processor Return a dialect-specific literal processor for this type.
Method _cached_result_processor Return a dialect-specific result processor for this type.
Method _compare_type_affinity Undocumented
Method _default_dialect Undocumented
Method _dialect_info Return a dialect-specific registry which caches a dialect-specific implementation, bind processing function, and one or more result processing functions.
Method _gen_dialect_impl Undocumented
Method _resolve_for_literal adjust this type given a literal Python value that will be stored in a bound parameter.
Method _resolve_for_python_type given a Python type (e.g. ``int``, ``str``, etc. ) return an instance of this :class:`.TypeEngine` that's appropriate for this type.
Method _unwrapped_dialect_impl Return the 'unwrapped' dialect impl for this type.
Class Variable _is_array Undocumented
Class Variable _is_table_value Undocumented
Class Variable _is_tuple_type Undocumented
Class Variable _is_type_decorator Undocumented
Class Variable _isnull Undocumented
Class Variable _sqla_type Undocumented
Property _generic_type_affinity Undocumented
Property _has_bind_expression memoized boolean, check if bind_expression is implemented.
Property _has_column_expression memoized boolean, check if column_expression is implemented.

Inherited from Visitable (via FLOAT, Float, Numeric, HasExpressionLookup, TypeEngineMixin, TypeEngine):

Method __class_getitem__ Undocumented
Method __init_subclass__ Undocumented
Class Method _generate_compiler_dispatch Undocumented
Method _compiler_dispatch Undocumented
Class Variable _original_compiler_dispatch Undocumented
def __init__(self, binary_precision=None, asdecimal=False, decimal_return_scale=None): (source)
overrides sqlalchemy.sql.sqltypes.Float.__init__

Construct a FLOAT :param binary_precision: Oracle binary precision value to be rendered in DDL. This may be approximated to the number of decimal characters using the formula "decimal precision = 0.30103 * binary precision". The default value used by Oracle for FLOAT / DOUBLE PRECISION is 126. :param asdecimal: See :paramref:`_sqltypes.Float.asdecimal` :param decimal_return_scale: See :paramref:`_sqltypes.Float.decimal_return_scale`

__visit_name__: str = (source)
overrides sqlalchemy.sql.sqltypes.FLOAT.__visit_name__

Undocumented

binary_precision = (source)

Undocumented