Package com.hp.hpl.jena.sparql.algebra.optimize

Interface Summary

Interface	Description
Optimize.RewriterFactory
Rewrite

Class Summary

Class	Description
ExprTransformApplyTransform	A copying transform that applies an Op Transform to the algebra operator of E_Exist and E_NoExists
ExprVisitorApplyVisitor	An expr visitor that applies a OpVisitor to the algebra operator of E_Exist and E_NoExists
Optimize
OpVisitorExprPrepare
TransformDistinctToReduced	Transforms generic DISTINCT plus ORDER BY combinations to REDUCED plus ORDER BY which typically gives better performance and memory consumption because engines have to keep less data in-memory to evaluate it.
TransformExpandOneOf
TransformFilterConjunction	Redo FILTER (A&&B) as FILTER(A) FILTER(B) (as an expr list).
TransformFilterDisjunction	Filter disjunction.
TransformFilterEquality
TransformFilterPlacement	Rewrite an algebra expression to put filters as close to their bound variables in a BGP.
TransformJoinStrategy	Choose join strategy
TransformMergeBGPs	Merge adjacent BGPsTransformCollapseBGPs
TransformOrderByDistinctAppplication	Improved optimization for ORDER BY plus DISTINCT or REDUCED combinations, see JENA-441 for original proposal and discussion.
TransformPathFlattern	Perform the equivalent of the trasnactions in the SPARQL 1.1 spec.
TransformPathFlatternStd	The path transformation step exactly as per the SPARQL 1.1 spec.
TransformPattern2Join	Expand BGPs to joins of triples.
TransformPropertyFunction	Rewrite to replace a property function property with the call to the property function implementation
TransformRemoveLabels
TransformReorder	A Transformer that applies a reordering to all BGPs and Quad Patterns present in the algebra
TransformScopeRename	Rename variables so that names can be treated globally.
TransformSimplify
TransformTopN