Package org.eclipse.rdf4j.query.algebra.evaluation.optimizer
package org.eclipse.rdf4j.query.algebra.evaluation.optimizer

ClassDescriptionAssigns values to variables based on a supplied set of bindings.Optimizes a query model by inlining
BindingSetAssignment
values where possible.Splits conjunctive constraints into seperate constraints.A query optimizer that optimizes constant value expressions.A query optimizer that optimize disjunctive constraints on tuple expressions.Optimizes a query model by pushingFilter
s as far down in the model tree as possible.Moves the Order node above the Projection when variables are projected.ChecksQueryModelNode.getParentNode()
references that have become inconsistent with the actual algebra tree structure due to optimization operations.Cleans upQueryModelNode.getParentNode()
references that have become inconsistent with the actual algebra tree structure due to optimization operations.If a projection node in the algebra does not contribute or change the results it can be removed from the tree.A query optimizer that reorders nested Joins.A query optimizer that (partially) normalizes query models to a canonical form.A query optimizer that replaces REGEX withFunctionCall
s that are equivalent operatorsA standard pipeline with the defaultQueryOptimizer
s that will be used byStrictEvaluationStrategy
and its subclasses, unless specifically overridden.Inspect Union clauses to check if scope change can be avoided (allowing injection of prebound vars into union arguments).