com.bigdata.rdf.sparql.ast

Interface GraphPatternGroup.Annotations

All Known Subinterfaces:

AbstractOptimizerTestCase.Annotations

Enclosing class:

GraphPatternGroup<E extends IGroupMemberNode>

public static interface GraphPatternGroup.Annotations

Field Summary

Fields

Modifier and Type	Field and Description
static String	JOIN_VARS An IVariable[] of the join variables will be definitely bound when we begin to evaluate a sub-group.
static String	PROJECT_IN_VARS An IVariable[] of the variables that are used by the group and that have already appeared in the query up to this point (and thus may be bound and should be projected into the group).

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

JOIN_VARS

static final String JOIN_VARS

An IVariable[] of the join variables will be definitely bound when we begin to evaluate a sub-group. This information is used to build a hash index on the join variables and to hash join the sub-group's solutions back into the parent group's solutions.

See Also:

ASTSubGroupJoinVarOptimizer, Constant Field Values

PROJECT_IN_VARS

static final String PROJECT_IN_VARS

An IVariable[] of the variables that are used by the group and that have already appeared in the query up to this point (and thus may be bound and should be projected into the group).

See Also:

ASTSubGroupJoinVarOptimizer, Constant Field Values