Class BranchesVisitor
- java.lang.Object
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- org.apache.flink.optimizer.traversals.BranchesVisitor
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- All Implemented Interfaces:
org.apache.flink.util.Visitor<OptimizerNode>
public final class BranchesVisitor extends Object implements org.apache.flink.util.Visitor<OptimizerNode>
This traversal of the optimizer DAG computes the information needed to track branches and joins in the data flow. This is important to support plans that are not a minimally connected DAG (Such plans are not trees, but at least one node feeds its output into more than one other node).
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Constructor Summary
Constructors Constructor Description BranchesVisitor()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidpostVisit(OptimizerNode node)booleanpreVisit(OptimizerNode node)
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Method Detail
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preVisit
public boolean preVisit(OptimizerNode node)
- Specified by:
preVisitin interfaceorg.apache.flink.util.Visitor<OptimizerNode>
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postVisit
public void postVisit(OptimizerNode node)
- Specified by:
postVisitin interfaceorg.apache.flink.util.Visitor<OptimizerNode>
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