sqlalchemy.sql.base.Immutable

class documentation

class Immutable: (source)

Known subclasses: sqlalchemy.orm.attributes.QueryableAttribute, sqlalchemy.sql.base.SingletonConstant, sqlalchemy.sql.elements.ColumnClause, sqlalchemy.sql.selectable.TableClause

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mark a ClauseElement as 'immutable' when expressions are cloned. "immutable" objects refers to the "mutability" of an object in the context of SQL DQL and DML generation. Such as, in DQL, one can compose a SELECT or subquery of varied forms, but one cannot modify the structure of a specific table or column within DQL. :class:`.Immutable` is mostly intended to follow this concept, and as such the primary "immutable" objects are :class:`.ColumnClause`, :class:`.Column`, :class:`.TableClause`, :class:`.Table`.

Method	`params`	Undocumented
Method	`unique_params`	Undocumented
Class Variable	`__slots__`	Undocumented
Method	`_clone`	Undocumented
Method	`_copy_internals`	Undocumented
Class Variable	`_is_immutable`	Undocumented

def params(self, *optionaldict, **kwargs): (source) ¶

Undocumented

def unique_params(self, *optionaldict, **kwargs): (source) ¶

Undocumented

__slots__: tuple = (source) ¶

overridden in sqlalchemy.orm.attributes.QueryableAttribute

Undocumented

def _clone(self: _Self, **kw: Any) -> _Self: (source) ¶

overridden in sqlalchemy.orm.attributes.QueryableAttribute, sqlalchemy.sql.elements.ColumnClause

Undocumented

def _copy_internals(self, *, omit_attrs: Iterable[str] = (), **kw: Any): (source) ¶

Undocumented

_is_immutable: bool = (source) ¶

Undocumented