Package org.apache.calcite.plan
Class RelOptUtil.VariableSetVisitor
- java.lang.Object
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- org.apache.calcite.rel.RelVisitor
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- org.apache.calcite.plan.RelOptUtil.VariableSetVisitor
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- Enclosing class:
- RelOptUtil
private static class RelOptUtil.VariableSetVisitor extends RelVisitor
Visitor that finds all variables used but not stopped in an expression.
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Field Summary
Fields Modifier and Type Field Description (package private) java.util.Set<CorrelationId>
variables
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Constructor Summary
Constructors Modifier Constructor Description private
VariableSetVisitor()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
visit(RelNode p, int ordinal, RelNode parent)
Visits a node during a traversal.-
Methods inherited from class org.apache.calcite.rel.RelVisitor
go, replaceRoot
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Field Detail
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variables
final java.util.Set<CorrelationId> variables
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Method Detail
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visit
public void visit(RelNode p, int ordinal, RelNode parent)
Description copied from class:RelVisitor
Visits a node during a traversal.- Overrides:
visit
in classRelVisitor
- Parameters:
p
- Node to visitordinal
- Ordinal of node within its parentparent
- Parent of the node, or null if it is the root of the traversal
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