Uses of Class
edu.harvard.seas.pl.abcdatalog.engine.topdown.Relation

Packages that use Relation

Package	Description
edu.harvard.seas.pl.abcdatalog.engine.topdown	This package contains implementations of standard top-down Datalog evaluation algorithms.

Uses of Relation in edu.harvard.seas.pl.abcdatalog.engine.topdown

Subclasses of Relation in edu.harvard.seas.pl.abcdatalog.engine.topdown

Modifier and Type	Class	Description
class	QsqSupRelation	A supplementary relation used in QSQ evaluation.

Fields in edu.harvard.seas.pl.abcdatalog.engine.topdown with type parameters of type Relation

Modifier and Type	Field	Description
protected final Map<PredicateSym,Relation>	AbstractQsqEngine.edbRelations	EDB facts mapped by predicate symbol.

Methods in edu.harvard.seas.pl.abcdatalog.engine.topdown that return Relation

Modifier and Type	Method	Description
Relation	Relation.applyTuplesAsSubstitutions(Tuple x)	For each tuple t in this relation, creates a substitution by mapping each attribute in the schema to the corresponding element in t, and then creates a new relation by applying each substitution to the input tuple x.
Relation	Relation.filter(Function<Tuple,Boolean> f)	Returns a new relation consisting of those tuples that meet the supplied predicate.
Relation	Relation.joinAndProject(Relation other, TermSchema schema)	Creates a new relation by joining this relation with the other relation and projecting onto the supplied attribute schema.
Relation	Relation.project(List<Boolean> colsToKeep)	Creates a new relation that results from the projection of this relation.

Methods in edu.harvard.seas.pl.abcdatalog.engine.topdown with parameters of type Relation

Modifier and Type	Method	Description
boolean	Relation.addAll(Relation other)	Add all the tuples of another relation to this relation.
Relation	Relation.joinAndProject(Relation other, TermSchema schema)	Creates a new relation by joining this relation with the other relation and projecting onto the supplied attribute schema.
boolean	Relation.removeAll(Relation other)	Remove all the tuples in other relation from this relation.

Constructors in edu.harvard.seas.pl.abcdatalog.engine.topdown with parameters of type Relation

Modifier	Constructor	Description
	Relation(Relation other)	Constructs a relation from another relation.