QueryBackend

class lsst.daf.butler.registry.queries.QueryBackend

Bases: abc.ABC

An interface for constructing and evaluating the Relation objects that comprise registry queries.

This ABC is expected to have a concrete subclass for each concrete registry type.

Attributes Summary

managers	A struct containing the manager instances that back a SQL registry.
universe	Definition of all dimensions and dimension elements for this registry.

Attributes Documentation

managers

A struct containing the manager instances that back a SQL registry.

Notes

This property is a temporary interface that will be removed in favor of new methods once the manager and storage classes have been integrated with Relation.

universe

Definition of all dimensions and dimension elements for this registry.