org.apache.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule
public class EliminateUnnestAggregateSequencesRule extends Object implements org.apache.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule
Before plan__parent UNNEST( $v2 : iterate( $v1 ) ) AGGREGATE( $v1 : sequence( $v0 ) ) plan__child where plan__parent does not use $v1 and $v0 is defined in plan__child. After plan__parent UNNEST( $v2 : iterate( $v1 ) ) ASSIGN( $v1 : $v0 ) plan__child
Constructor | Description |
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EliminateUnnestAggregateSequencesRule() |
Modifier and Type | Method | Description |
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boolean |
rewritePost(org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator> opRef,
org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext context) |
|
boolean |
rewritePre(org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator> opRef,
org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext context) |
public EliminateUnnestAggregateSequencesRule()
public boolean rewritePre(org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator> opRef, org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext context) throws org.apache.hyracks.algebricks.common.exceptions.AlgebricksException
rewritePre
in interface org.apache.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule
org.apache.hyracks.algebricks.common.exceptions.AlgebricksException
public boolean rewritePost(org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator> opRef, org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext context)
rewritePost
in interface org.apache.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule
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