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| <div class="sub-title"><span class="module-label-in-package">Module</span> <a href="../../../../../../module-summary.html">org.apache.jena.arq</a></div> |
| <h1 title="Package org.apache.jena.sparql.algebra.optimize" class="title">Package org.apache.jena.sparql.algebra.optimize</h1> |
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| <div class="col-first even-row-color"><a href="../package-summary.html">org.apache.jena.sparql.algebra</a></div> |
| <div class="col-last even-row-color"> </div> |
| <div class="col-first odd-row-color"><a href="../op/package-summary.html">org.apache.jena.sparql.algebra.op</a></div> |
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| <div id="class-summary.tabpanel" role="tabpanel"> |
| <div class="summary-table two-column-summary" aria-labelledby="class-summary-tab0"> |
| <div class="table-header col-first">Class</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="ExprTransformApplyTransform.html" title="class in org.apache.jena.sparql.algebra.optimize">ExprTransformApplyTransform</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">A copying transform that applies an Op Transform to the algebra operator of E_Exist and E_NoExists</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="ExprTransformConstantFold.html" title="class in org.apache.jena.sparql.algebra.optimize">ExprTransformConstantFold</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">An expression transform that simplifies expressions by constant folding |
| wherever possible</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="ExprVisitorApplyVisitor.html" title="class in org.apache.jena.sparql.algebra.optimize">ExprVisitorApplyVisitor</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">An expr visitor that applies a OpVisitor to the algebra operator of E_Exist and E_NoExists</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="Optimize.html" title="class in org.apache.jena.sparql.algebra.optimize">Optimize</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">Optimization of algebra expressions.</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="OptimizerMinimal.html" title="class in org.apache.jena.sparql.algebra.optimize">OptimizerMinimal</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">The minimal optimizer.</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="OptimizerStd.html" title="class in org.apache.jena.sparql.algebra.optimize">OptimizerStd</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">The standard optimization sequence.</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="OpVisitorExprPrepare.html" title="class in org.apache.jena.sparql.algebra.optimize">OpVisitorExprPrepare</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab1"><a href="Rewrite.html" title="interface in org.apache.jena.sparql.algebra.optimize">Rewrite</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab1"> </div> |
| <div class="col-first even-row-color class-summary class-summary-tab1"><a href="RewriteFactory.html" title="interface in org.apache.jena.sparql.algebra.optimize">RewriteFactory</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab1"> |
| <div class="block">Factory for rewriters</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformDistinctToReduced.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformDistinctToReduced</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block"> |
| Transforms generic <code>DISTINCT</code> plus <code>ORDER BY</code> combinations to |
| <code>REDUCED</code> plus <code>ORDER BY</code> which typically gives better |
| performance and memory consumption because engines have to keep less data |
| in-memory to evaluate it.</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformEliminateAssignments.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformEliminateAssignments</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">A transform that tries to in-line/eliminate assignments</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformExpandOneOf.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformExpandOneOf</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformExtendCombine.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformExtendCombine</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">An optimizer that aims to combine multiple extend clauses together.</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformFilterConjunction.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformFilterConjunction</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">Redo FILTER (A&&B) as FILTER(A) FILTER(B) (as an expr list).</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformFilterDisjunction.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformFilterDisjunction</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">Filter disjunction.</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformFilterEquality.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformFilterEquality</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">A transform that aims to optimize queries where there is an equality |
| constraint on a variable to speed up evaluation e.g</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformFilterImplicitJoin.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformFilterImplicitJoin</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block"> |
| Optimizer for transforming implicit joins.</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformFilterInequality.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformFilterInequality</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">A transform that aims to optimize queries where there is an inequality |
| constraint on a variable in an attempt to speed up evaluation e.g</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformFilterPlacement.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformFilterPlacement</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">Rewrite an algebra expression to put filters as close to their bound |
| variables.</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformFilterPlacement.Placement.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformFilterPlacement.Placement</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformFilterPlacementConservative.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformFilterPlacementConservative</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">Rewrite an algebra expression to put filters as close to their bound |
| variables in a BGP.</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformImplicitLeftJoin.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformImplicitLeftJoin</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block"> |
| Optimizer for transforming implicit joins.</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformJoinStrategy.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformJoinStrategy</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">Choose join strategy</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformMergeBGPs.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformMergeBGPs</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">Merge BGPs, additionally merges the special <a href="../op/OpTriple.html" title="class in org.apache.jena.sparql.algebra.op"><code>OpTriple</code></a> operator which is a BGP of a single triple pattern that |
| may be introduced by other transforms |
| |
| |
| (join BGP1 BGP2) => BGP |
| (sequence ...BGP1 BGP2 ...) => (sequence ...BGP ...) |
| </div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformOrderByDistinctApplication.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformOrderByDistinctApplication</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block"> |
| Improved optimization for <code>ORDER BY</code> plus <code>DISTINCT</code> or |
| <code>REDUCED</code> combinations, see JENA-441 for original proposal and |
| discussion.</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformPathFlatten.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformPathFlatten</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">Perform the equivalent of the transactions in the SPARQL 1.1 spec.</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformPathFlattenAlgebra.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformPathFlattenAlgebra</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">The path transformation step mostly per the SPARQL 1.1 spec with some enhancement e.g.</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformPattern2Join.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformPattern2Join</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">Expand basic graph patterns and quad patterns to |
| joins of <code>(triple)</code> and <code>(quad)</code>.</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformPromoteTableEmpty.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformPromoteTableEmpty</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">Optimizer that ensures that <strong>table empty</strong> is promoted as high |
| up a query as is possible</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformPropertyFunction.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformPropertyFunction</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">Rewrite to replace a property function property with the call to the property function implementation</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformRemoveAssignment.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformRemoveAssignment</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">A transform capable of removing assignments from the algebra tree</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformRemoveLabels.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformRemoveLabels</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformReorder.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformReorder</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">A Transformer that applies a reordering to all BGPs and Quad Patterns present in the algebra</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformScopeRename.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformScopeRename</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">Rename variables so that names can be treated globally.</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="TransformSimplify.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformSimplify</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="TransformTopN.html" title="class in org.apache.jena.sparql.algebra.optimize">TransformTopN</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">Optimization that changes queries that uses <code>OFFSET/LIMIT</code> and <code>ORDER BY</code> |
| to execute using <code>Top N</code>: i.e.</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="VariableUsagePopper.html" title="class in org.apache.jena.sparql.algebra.optimize">VariableUsagePopper</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">An after visitor for tracking variable usage</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="VariableUsagePusher.html" title="class in org.apache.jena.sparql.algebra.optimize">VariableUsagePusher</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">A before visitor for tracking variable usage</div> |
| </div> |
| <div class="col-first even-row-color class-summary class-summary-tab2"><a href="VariableUsageTracker.html" title="class in org.apache.jena.sparql.algebra.optimize">VariableUsageTracker</a></div> |
| <div class="col-last even-row-color class-summary class-summary-tab2"> |
| <div class="block">Tracker for variable usage</div> |
| </div> |
| <div class="col-first odd-row-color class-summary class-summary-tab2"><a href="VariableUsageVisitor.html" title="class in org.apache.jena.sparql.algebra.optimize">VariableUsageVisitor</a></div> |
| <div class="col-last odd-row-color class-summary class-summary-tab2"> |
| <div class="block">A visitor which tracks variable usage</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| </li> |
| </ul> |
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