Package it.unibz.inf.ontop.iq.node

Interface Summary

Interface	Description
AggregationNode	Combines GROUP BY and a projection See IntermediateQueryFactory for creating a new instance.
BinaryNonCommutativeOperatorNode	Operator QueryNode which are binary and whose operands ordering is semantically meaningful.
BinaryOrderedOperatorNode	The ordering of the operands is meaningful procedurally, and therefore should be preserved.
CommutativeJoinNode	Commutative: the children order does not matter
CommutativeJoinOrFilterNode	Union of CommutativeJoinNode and FilterNode
ConstructionNode	Head node an IntermediateQuery TODO: further explain See IntermediateQueryFactory for creating a new instance.
DataNode<P extends AtomPredicate>	TODO: describe
DistinctNode	See IntermediateQueryFactory for creating a new instance.
DummyVariableNullability
EmptyNode	Temporary QueryNode that says that replace a non-satisfied sub-tree.
ExplicitVariableProjectionNode	Node that explicitly declares the variables returned by its sub-tree.
ExtendedProjectionNode	Common abstraction for ConstructionNode and AggregationNode
ExtensionalDataNode	TODO: explain
FilterNode	TODO: explain See IntermediateQueryFactory for creating a new instance.
InnerJoinLikeNode
InnerJoinNode	See IntermediateQueryFactory for creating a new instance.
IntensionalDataNode	TODO: explain TODO: find a better name See IntermediateQueryFactory for creating a new instance.
JoinLikeNode	Any kind of JOIN (inner, left join)
JoinOrFilterNode	TODO: explain
LeftJoinNode	See IntermediateQueryFactory for creating a new instance.
NaryOperatorNode	Has at least two children
NativeNode	Represents a serialized query that can be executed by the DB engine See IntermediateQueryFactory for creating a new instance.
NodeTransformationProposal	TODO: explain
OrderByNode	Follows a NULLS FIRST semantics (if ascending, NULLS LAST otherwise), similarly to SPARQL See https://www.w3.org/TR/sparql11-query/#modOrderBy See IntermediateQueryFactory for creating a new instance.
OrderByNode.OrderComparator
QueryModifierNode
QueryNode	Immutable.
QueryNodeVisitor	Visits QueryNodes without having effect on them and the intermediate query.
SliceNode	See IntermediateQueryFactory for creating a new instance.
TrueNode	See IntermediateQueryFactory for creating a new instance.
UnaryOperatorNode	Has ONE child
UnionNode	All its children are expected to project its projected variables See IntermediateQueryFactory for creating a new instance.
VariableNullability	TODO: find a better name IMMUTABLE See CoreUtilsFactory for creating new instances

Enum Summary

Enum	Description
BinaryOrderedOperatorNode.ArgumentPosition
NodeTransformationProposedState	Transformation to the local node.