it.unibz.inf.ontop.dbschema

Interface ForeignKeyConstraint

All Known Implementing Classes:

ForeignKeyConstraintImpl

public interface ForeignKeyConstraint

Foreign Key constraints

FOREIGN KEY (columnName (, columnName)*) REFERENCES refTableName (refColumnName (, refColumnName)*)

(a particular case of linear tuple-generating dependencies
\forall x (\exists y_1 R_1(x,y_1) \to \exists y_2 R_2(x,y_2))
where x, y_1 and y_2 are *tuples* of variables)

Author:

Roman Kontchakov

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ForeignKeyConstraint.Builder
static interface	ForeignKeyConstraint.Component

Method Summary

Modifier and Type	Method and Description
static ForeignKeyConstraint.Builder	builder(String name, DatabaseRelationDefinition relation, DatabaseRelationDefinition referencedRelation) creates a FOREIGN KEY builder
com.google.common.collect.ImmutableList<ForeignKeyConstraint.Component>	getComponents() returns the components of the foreign key constraint each component defines a map from an attribute of the relation to an attribute of the referenced relation
String	getName() returns the name of the foreign key constraint
DatabaseRelationDefinition	getReferencedRelation() returns referenced database relation
DatabaseRelationDefinition	getRelation() returns the relation with the foreign key
static void	of(String name, Attribute attribute, Attribute referencedAttribute) creates a single-attribute foreign key

Method Detail

builder

static ForeignKeyConstraint.Builder builder(String name,
                                            DatabaseRelationDefinition relation,
                                            DatabaseRelationDefinition referencedRelation)

creates a FOREIGN KEY builder

Parameters:

name -

relation -

referencedRelation -

Returns:

of

static void of(String name,
               Attribute attribute,
               Attribute referencedAttribute)

creates a single-attribute foreign key

getName

String getName()

returns the name of the foreign key constraint

Returns:

name

getComponents

com.google.common.collect.ImmutableList<ForeignKeyConstraint.Component> getComponents()

returns the components of the foreign key constraint each component defines a map from an attribute of the relation to an attribute of the referenced relation

Returns:

getReferencedRelation

DatabaseRelationDefinition getReferencedRelation()

returns referenced database relation

Returns:

referenced relation

getRelation

DatabaseRelationDefinition getRelation()

returns the relation with the foreign key

Returns:

relation