sqlalchemy.sql.visitors.ExternalTraversal

class documentation

class ExternalTraversal(object):

Base class for visitor objects which can traverse externally using the .visitors.traverse function.

Direct usage of the .visitors.traverse function is usually preferred.

Method	`chain`	'Chain' an additional ClauseVisitor onto this ClauseVisitor.
Method	`iterate`	Traverse the given expression structure, returning an iterator of all elements.
Method	`traverse`	Traverse and visit the given expression structure.
Method	`traverse_single`	Undocumented
Class Variable	`__traverse_options__`	Undocumented
Property	`_visitor_dict`	Undocumented
Property	`visitor_iterator`	Iterate through this visitor and each 'chained' visitor.

def chain(self, visitor):

'Chain' an additional ClauseVisitor onto this ClauseVisitor.

The chained visitor will receive all visit events after this one.

def iterate(self, obj):

Traverse the given expression structure, returning an iterator of all elements.

def traverse(self, obj):

overridden in sqlalchemy.sql.visitors.CloningExternalTraversal

Traverse and visit the given expression structure.

def traverse_single(self, obj, **kw):

Undocumented

__traverse_options__: dict =

overridden in sqlalchemy.sql.util.ClauseAdapter

Undocumented

@util.memoized_property
_visitor_dict =

Undocumented

@property
visitor_iterator =

Iterate through this visitor and each 'chained' visitor.