Package org.apache.iotdb.db.qp.strategy.optimizer

Class ConcatPathOptimizer

java.lang.Object

org.apache.iotdb.db.qp.strategy.optimizer.ConcatPathOptimizer

All Implemented Interfaces:

ILogicalOptimizer

public class ConcatPathOptimizer
extends java.lang.Object
implements ILogicalOptimizer

concat paths in select and from clause.

Constructor Summary

Constructors

Constructor	Description
ConcatPathOptimizer()

Method Summary

Modifier and Type	Method	Description
static <T> void	cartesianProduct(java.util.List<java.util.List<T>> dimensionValue, java.util.List<java.util.List<T>> resultList, int layer, java.util.List<T> currentList)
Operator	transform(Operator operator)

Methods inherited from class java.lang.Object

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

Constructor Detail

ConcatPathOptimizer

public ConcatPathOptimizer()

Method Detail

transform

public Operator transform(Operator operator)
                   throws LogicalOptimizeException,
                          PathNumOverLimitException

Specified by:

transform in interface ILogicalOptimizer

Throws:

LogicalOptimizeException

PathNumOverLimitException

cartesianProduct

public static <T> void cartesianProduct(java.util.List<java.util.List<T>> dimensionValue,
                                        java.util.List<java.util.List<T>> resultList,
                                        int layer,
                                        java.util.List<T> currentList)