Module terminus_store::layer

Logic for working with layers.

Databases in terminus-store are stacks of layers. The first layer in such a stack is a base layer, which contains an intial data set. On top of that, each layer stores additions and removals.

Structs

BaseLayer	A base layer.
BaseLayerFileBuilder	A builder for a base layer.
BaseLayerFileBuilderPhase2	Second phase of base layer building.
BaseTripleStream
ChildLayer	A child layer.
ChildLayerFileBuilder	A builder for a child layer.
ChildLayerFileBuilderPhase2	Second phase of child layer building.
ChildTripleStream
GenericObjectIterator
GenericObjectLookup
GenericPredicateLookup
GenericSubjectIterator
GenericSubjectLookup	A SubjectLookup that is implemented in terms of addition and removal lookups
GenericSubjectPredicateIterator
GenericSubjectPredicateLookup
GenericSubjectPredicateObjectIterator
GenericSubjectPredicatePairIterator
IdTriple	A triple, stored as numerical ids.
InternalLayerTripleObjectIterator
InternalLayerTriplePredicateIterator
InternalLayerTripleSubjectIterator
InternalTripleObjectIterator
InternalTriplePredicateIterator
InternalTripleStackIterator
InternalTripleSubjectIterator
LayerCounts
ObjectSubjectPredicatePairIterator
OptInternalLayerTripleObjectIterator
OptInternalLayerTriplePredicateIterator
OptInternalLayerTripleSubjectIterator
PartiallyResolvedTriple	A triple where the subject, predicate and object can all either be fully resolved to an id, or unresolved.
SimpleLayerBuilder	A layer builder
StringTriple	A triple stored as strings.

Enums

InternalLayer
LayerStackError
LayerType	The type of a layer - either base or child.
ObjectType	The type of an object in a triple.
PossiblyResolved	Either a resolved id or an unresolved inner type.
TripleChange

Traits

InternalLayerImpl
Layer	A layer containing dictionary entries and triples.
LayerBuilder	A layer builder trait with no generic typing.
LayerObjectLookup	a trait that caches a lookup by object in a single layer's addition or removals.
LayerPredicateLookup
LayerSubjectLookup	A trait that caches a lookup in a layer by subject, but only for that layer and not its parents.
LayerSubjectPredicateLookup	a trait that caches a lookup in a layer by subject and predicate, but only for that layer and not its parents.
ObjectLookup	a trait that caches a lookup in a layer by object.
PredicateLookup	A trait that caches a lookup in a layer by predicate.
SubjectLookup	A trait that caches a lookup in a layer by subject.
SubjectPredicateLookup	a trait that caches a lookup in a layer by subject and predicate.

Functions

layer_subject_lookup_into_generic
open_base_triple_stream
open_child_triple_stream