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

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

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

org.apache.vxquery.compiler.rewriter.rules.PushChildIntoDataScanRule

The rule searches for an unnest operator immediately following a data scan operator.

 Before  plan__parent UNNEST( $v2 : child( $v1 ) ) DATASCAN( $source : $v1 ) plan__child Where $v1 is not used in plan__parent. After plan__parent DATASCAN( $source : $v1 ) plan__child $source is encoded with the child parameters.

@author prestonc

        normalization.add(new IntroduceCollectionRule());
        normalization.add(new RemoveUnusedAssignAndAggregateRule());


        // Adds child steps to the data source scan.
        normalization.add(new ConsolidateUnnestsRule());
        normalization.add(new PushChildIntoDataScanRule());


        // Improvement for scalar child expressions
        normalization.add(new EliminateSubplanForSingleItemsRule());
        return normalization;
    }

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        normalization.add(new IntroduceCollectionRule());
        normalization.add(new RemoveUnusedAssignAndAggregateRule());


        // Adds child steps to the data source scan.
        normalization.add(new ConsolidateUnnestsRule());
        normalization.add(new PushChildIntoDataScanRule());


        // Improvement for scalar child expressions
        normalization.add(new EliminateSubplanForSingleItemsRule());
        return normalization;
    }

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

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

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

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

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

org.apache.vxquery.compiler.rewriter.RewriteRuleset

org.apache.vxquery.metadata.VXQueryCollectionDataSource

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