Examples of org.apache.vxquery.compiler.rewriter.rules.EliminateUnnestAggregateSubplanRule

Package org.apache.vxquery.compiler.rewriter.rules

Examples of org.apache.vxquery.compiler.rewriter.rules.EliminateUnnestAggregateSubplanRule

org.apache.vxquery.compiler.rewriter.rules.EliminateUnnestAggregateSubplanRule

The rule searches for unnest followed by subplan with the root operator an aggregate and removes the aggregate subplan.

 Before %PARENT_PLAN UNNEST( $v2 : iterate( $v1 ) ) SUBPLAN{ AGGREGATE( $v1 : sequence( %expression ) ) %NESTED_PLAN NESTEDTUPLESOURCE } %CHILD_PLAN where %PARENT_PLAN does not use $v1. After  %PARENT_PLAN UNNEST( $v2 : iterate( $v3 ) ) ASSIGN( $v3 : %expression ) %NESTED_PLAN %CHILD_PLAN

        normalization.add(new RemoveUnusedTreatRule());
        normalization.add(new RemoveRedundantVariablesRule());
        normalization.add(new RemoveUnusedAssignAndAggregateRule());


        // Find unnest followed by aggregate in a subplan. 
        normalization.add(new EliminateUnnestAggregateSubplanRule());
        normalization.add(new RemoveRedundantVariablesRule());
        normalization.add(new RemoveUnusedAssignAndAggregateRule());


        // Remove single tuple input subplans and merge unnest aggregate operators.
        // TODO Fix EliminateSubplanForSinglePathsRule to check for variables used after the subplan.

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        normalization.add(new RemoveUnusedTreatRule());
        normalization.add(new RemoveRedundantVariablesRule());
        normalization.add(new RemoveUnusedAssignAndAggregateRule());


        // Find unnest followed by aggregate in a subplan. 
        normalization.add(new EliminateUnnestAggregateSubplanRule());
        normalization.add(new RemoveRedundantVariablesRule());
        normalization.add(new RemoveUnusedAssignAndAggregateRule());


        // Remove single tuple input subplans and merge unnest aggregate operators.
        // TODO Fix EliminateSubplanForSinglePathsRule to check for variables used after the subplan.

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Related Classes of org.apache.vxquery.compiler.rewriter.rules.EliminateUnnestAggregateSubplanRule

edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression

edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable

edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression

edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression

edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator

edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AggregateOperator

edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AssignOperator

edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.SubplanOperator

edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator

org.apache.vxquery.compiler.rewriter.RewriteRuleset

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