Package org.apache.iotdb.db.qp.logical.crud

Class FilterOperator

java.lang.Object

org.apache.iotdb.db.qp.logical.crud.FilterOperator

All Implemented Interfaces:

java.lang.Comparable<FilterOperator>

Direct Known Subclasses:

FunctionOperator

public class FilterOperator
extends java.lang.Object
implements java.lang.Comparable<FilterOperator>

This class is for filter in where clause. It may consist of more than two child FilterOperators, but if it's not a leaf operator, the relation is the same among all of its children (AND or OR), which is identified by tokenType.

Field Summary

Fields

Modifier and Type	Field	Description
protected FilterConstant.FilterType	filterType
protected boolean	isLeaf

Constructor Summary

Constructors

Constructor	Description
FilterOperator()
FilterOperator(FilterConstant.FilterType filterType)
FilterOperator(FilterConstant.FilterType filterType, boolean isSingle)

Method Summary

Modifier and Type	Method	Description
void	addChildOperator(FilterOperator op)
int	compareTo(FilterOperator fil)	a filter with null path is no smaller than any other filter.
FilterOperator	copy()
boolean	equals(java.lang.Object fil)
java.util.List<FilterOperator>	getChildren()
java.lang.String	getFilterName()
java.lang.String	getFilterSymbol()
FilterConstant.FilterType	getFilterType()
java.util.Set<org.apache.iotdb.commons.path.PartialPath>	getPathSet()
org.apache.iotdb.commons.path.PartialPath	getSinglePath()
int	hashCode()
boolean	isLeaf()
boolean	isSingle()
void	setChildren(java.util.List<FilterOperator> children)
void	setFilterType(FilterConstant.FilterType filterType)
void	setIsSingle(boolean b)
void	setPathSet(java.util.Set<org.apache.iotdb.commons.path.PartialPath> pathSet)
void	setSinglePath(org.apache.iotdb.commons.path.PartialPath singlePath)
java.lang.String	showTree()
java.lang.String	showTree(int spaceNum)
java.lang.String	toString()
org.apache.iotdb.tsfile.read.expression.IExpression	transformToExpression(java.util.Map<org.apache.iotdb.commons.path.PartialPath,org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> pathTSDataTypeHashMap)	For a filter operator, if isSingle, call transformToSingleQueryFilter. FilterOperator cannot be leaf.
protected org.apache.iotdb.tsfile.utils.Pair<org.apache.iotdb.tsfile.read.expression.IUnaryExpression,java.lang.String>	transformToSingleQueryFilter(java.util.Map<org.apache.iotdb.commons.path.PartialPath,org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> pathTSDataTypeHashMap)	it will be used in BasicFunction Operator.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

filterType

protected FilterConstant.FilterType filterType

isLeaf

protected boolean isLeaf

Constructor Detail

FilterOperator

public FilterOperator()

FilterOperator

public FilterOperator(FilterConstant.FilterType filterType)

FilterOperator

public FilterOperator(FilterConstant.FilterType filterType,
                      boolean isSingle)

Method Detail

getFilterType

public FilterConstant.FilterType getFilterType()

setFilterType

public void setFilterType(FilterConstant.FilterType filterType)

getFilterName

public java.lang.String getFilterName()

getFilterSymbol

public java.lang.String getFilterSymbol()

getChildren

public java.util.List<FilterOperator> getChildren()

setChildren

public void setChildren(java.util.List<FilterOperator> children)

setIsSingle

public void setIsSingle(boolean b)

getSinglePath

public org.apache.iotdb.commons.path.PartialPath getSinglePath()

setSinglePath

public void setSinglePath(org.apache.iotdb.commons.path.PartialPath singlePath)

addChildOperator

public void addChildOperator(FilterOperator op)

setPathSet

public void setPathSet(java.util.Set<org.apache.iotdb.commons.path.PartialPath> pathSet)

getPathSet

public java.util.Set<org.apache.iotdb.commons.path.PartialPath> getPathSet()

transformToExpression

public org.apache.iotdb.tsfile.read.expression.IExpression transformToExpression(java.util.Map<org.apache.iotdb.commons.path.PartialPath,org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> pathTSDataTypeHashMap)
                                                                          throws QueryProcessException

For a filter operator, if isSingle, call transformToSingleQueryFilter.
FilterOperator cannot be leaf.

Parameters:

pathTSDataTypeHashMap -

Returns:

QueryFilter in TsFile

Throws:

QueryProcessException

transformToSingleQueryFilter

protected org.apache.iotdb.tsfile.utils.Pair<org.apache.iotdb.tsfile.read.expression.IUnaryExpression,java.lang.String> transformToSingleQueryFilter(java.util.Map<org.apache.iotdb.commons.path.PartialPath,org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> pathTSDataTypeHashMap)
                                                                                                                                                    throws LogicalOperatorException,
                                                                                                                                                           org.apache.iotdb.commons.exception.MetadataException

it will be used in BasicFunction Operator.

Parameters:

pathTSDataTypeHashMap -

Returns:

- pair.left: UnaryQueryFilter constructed by its one child; pair.right: Path represented by this child.

Throws:

org.apache.iotdb.commons.exception.MetadataException - exception in filter transforming

LogicalOperatorException

compareTo

public int compareTo(FilterOperator fil)

a filter with null path is no smaller than any other filter.

Specified by:

compareTo in interface java.lang.Comparable<FilterOperator>

equals

public boolean equals(java.lang.Object fil)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

isLeaf

public boolean isLeaf()

isSingle

public boolean isSingle()

showTree

public java.lang.String showTree()

showTree

public java.lang.String showTree(int spaceNum)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

copy

public FilterOperator copy()