org.tikv.common.expression.visitor

Class PrunedPartitionBuilder

java.lang.Object

org.tikv.common.expression.Visitor<R,C>

org.tikv.common.expression.visitor.DefaultVisitor<com.google.common.collect.RangeSet<C>,Void>

org.tikv.common.expression.visitor.RangeSetBuilder<TypedKey>

org.tikv.common.expression.visitor.PrunedPartitionBuilder

public class PrunedPartitionBuilder
extends RangeSetBuilder<TypedKey>

Apply partition pruning rule on filter condition. Partition pruning is based on a simple idea and can be described as "Do not scan partitions where there can be no matching values". Currently only range partition pruning is supported(range column on multiple columns is not supported at TiDB side, so we can't optimize this yet).

Constructor Summary

Constructors

Constructor and Description
PrunedPartitionBuilder(Set<ColumnRef> partExprColRefs)

Method Summary

Modifier and Type	Method and Description
protected com.google.common.collect.RangeSet<TypedKey>	process(Expression node, Void context)
protected com.google.common.collect.RangeSet<TypedKey>	visit(ComparisonBinaryExpression node, Void context)
protected com.google.common.collect.RangeSet<TypedKey>	visit(Constant node, Void context)

Methods inherited from class org.tikv.common.expression.visitor.RangeSetBuilder

buildRange, visit

Methods inherited from class org.tikv.common.expression.visitor.DefaultVisitor

visit, visit, visit, visit, visit, visit, visit

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PrunedPartitionBuilder

public PrunedPartitionBuilder(Set<ColumnRef> partExprColRefs)

Method Detail

process

protected com.google.common.collect.RangeSet<TypedKey> process(Expression node,
                                                               Void context)

Overrides:

process in class RangeSetBuilder<TypedKey>

visit

protected com.google.common.collect.RangeSet<TypedKey> visit(Constant node,
                                                             Void context)

Overrides:

visit in class DefaultVisitor<com.google.common.collect.RangeSet<TypedKey>,Void>

visit

protected com.google.common.collect.RangeSet<TypedKey> visit(ComparisonBinaryExpression node,
                                                             Void context)

Overrides:

visit in class DefaultVisitor<com.google.common.collect.RangeSet<TypedKey>,Void>