com.bigdata.rdf.sparql.ast

Interface ArbitraryLengthPathNode.Annotations

All Known Subinterfaces:

AbstractOptimizerTestCase.Annotations

Enclosing class:

ArbitraryLengthPathNode

public static interface ArbitraryLengthPathNode.Annotations

Field Summary

Fields

Modifier and Type	Field and Description
static String	DROP_VARS A set of intermediate variables (VarNodes) used by the ALP node that should be dropped from the solutions after each round.
static String	EDGE_VAR The variable representing the visited edge.
static String	LEFT_TERM The left term - can be a variable or a constant.
static String	LOWER_BOUND The lower bound on the number of rounds to run.
static String	MIDDLE_TERM The middle term - can be a variable or a constant.
static String	RIGHT_TERM The right term - can be a variable or a constant.
static String	TRANSITIVITY_VAR_LEFT The left transitivity variable.
static String	TRANSITIVITY_VAR_RIGHT The right transitivity variable.
static String	UPPER_BOUND The upper bound on the number of rounds to run.

Fields inherited from interface com.bigdata.rdf.sparql.ast.IQueryNode.Annotations

QUERY_HINTS

Fields inherited from interface com.bigdata.rdf.sparql.ast.IJoinNode.Annotations

DEFAULT_MINUS, DEFAULT_OPTIONAL, FILTERS, MINUS, OPTIONAL

Field Detail

LEFT_TERM

static final String LEFT_TERM

The left term - can be a variable or a constant.

RIGHT_TERM

static final String RIGHT_TERM

The right term - can be a variable or a constant.

TRANSITIVITY_VAR_LEFT

static final String TRANSITIVITY_VAR_LEFT

The left transitivity variable.

TRANSITIVITY_VAR_RIGHT

static final String TRANSITIVITY_VAR_RIGHT

The right transitivity variable.

LOWER_BOUND

static final String LOWER_BOUND

The lower bound on the number of rounds to run. Can be zero (0) or one (1). A lower bound of zero is a special kind of path - the Zero Length Path. A zero length path connects a vertex to itself (in graph parlance). In the context of arbitrary length paths it means we bind the input onto the output regardless of whether they are actually connected via the path or not.

UPPER_BOUND

static final String UPPER_BOUND

The upper bound on the number of rounds to run.

MIDDLE_TERM

static final String MIDDLE_TERM

The middle term - can be a variable or a constant.

EDGE_VAR

static final String EDGE_VAR

The variable representing the visited edge. Bound using the binding from the middle term. Only used by ALP service when projecting edges.

DROP_VARS

static final String DROP_VARS

A set of intermediate variables (VarNodes) used by the ALP node that should be dropped from the solutions after each round.