sqlalchemy.sql.schema.DefaultClause

class documentation

class DefaultClause(FetchedValue):

A DDL-specified DEFAULT column value.

.DefaultClause is a .FetchedValue that also generates a "DEFAULT" clause when "CREATE TABLE" is emitted.

.DefaultClause is generated automatically whenever the server_default, server_onupdate arguments of _schema.Column are used. A .DefaultClause can be passed positionally as well.

For example, the following:

Column('foo', Integer, server_default="50")

Is equivalent to:

Column('foo', Integer, DefaultClause("50"))

Method	`__init__`	Undocumented
Method	`__repr__`	Undocumented
Class Variable	`has_argument`	Undocumented
Instance Variable	`arg`	Undocumented
Instance Variable	`reflected`	Undocumented

Inherited from FetchedValue:

Method	`_as_for_update`	Undocumented
Method	`_clone`	Undocumented
Method	`_set_parent`	Associate with this SchemaEvent's parent object.
Class Variable	`is_clause_element`	Undocumented
Class Variable	`is_server_default`	Undocumented
Instance Variable	`column`	Undocumented
Instance Variable	`for_update`	Undocumented

Inherited from SchemaEventTarget (via FetchedValue):

Method _set_parent_with_dispatch Undocumented

def __init__(self, arg, for_update=False, _reflected=False):

overrides sqlalchemy.sql.schema.FetchedValue.__init__

Undocumented

def __repr__(self):

overrides sqlalchemy.sql.schema.FetchedValue.__repr__

Undocumented

has_argument: bool =

overrides sqlalchemy.sql.schema.FetchedValue.has_argument

Undocumented

arg =

Undocumented

reflected =

overrides sqlalchemy.sql.schema.FetchedValue.reflected

Undocumented