org.apache.druid.query.filter

Class NotDimFilter

java.lang.Object

org.apache.druid.query.filter.AbstractOptimizableDimFilter

org.apache.druid.query.filter.NotDimFilter

All Implemented Interfaces:

Cacheable, DimFilter

public class NotDimFilter
extends AbstractOptimizableDimFilter
implements DimFilter

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.druid.query.filter.DimFilter

DimFilter.DimFilterToStringBuilder

Constructor Summary

Constructors

Constructor and Description
NotDimFilter(DimFilter field)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
byte[]	getCacheKey()
com.google.common.collect.RangeSet<String>	getDimensionRangeSet(String dimension) There are some special cases involving null that require special casing for And and Or instead of simply taking the complement Example 1 : "NOT ( [0,INF) OR null)" The inside of NOT would evaluate to null, and the complement would also be null.
DimFilter	getField()
Set<String>	getRequiredColumns()
int	hashCode()
DimFilter	optimize()
Filter	toFilter() Returns a Filter that implements this DimFilter.
String	toString()

Methods inherited from class org.apache.druid.query.filter.AbstractOptimizableDimFilter

toOptimizedFilter

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.query.filter.DimFilter

toOptimizedFilter

Constructor Detail

NotDimFilter

public NotDimFilter(DimFilter field)

Method Detail

getField

public DimFilter getField()

getCacheKey

public byte[] getCacheKey()

Specified by:

getCacheKey in interface Cacheable

optimize

public DimFilter optimize()

Specified by:

optimize in interface DimFilter

Returns:

Returns an optimized filter. returning the same filter can be a straightforward default implementation.

toFilter

public Filter toFilter()

Description copied from interface: DimFilter

Returns a Filter that implements this DimFilter. This does not generally involve optimizing the DimFilter, so it does make sense to optimize first and then call toFilter on the resulting DimFilter.

Specified by:

toFilter in interface DimFilter

Returns:

a Filter that implements this DimFilter, or null if this DimFilter is a no-op.

getDimensionRangeSet

public com.google.common.collect.RangeSet<String> getDimensionRangeSet(String dimension)

There are some special cases involving null that require special casing for And and Or instead of simply taking the complement Example 1 : "NOT ( [0,INF) OR null)" The inside of NOT would evaluate to null, and the complement would also be null. However, by breaking the NOT, this statement is "NOT([0,INF)) AND NOT(null)", which means it should actually evaluate to (-INF, 0). Example 2 : "NOT ( [0,INF) AND null )" The inside of NOT would evaluate to [0,INF), and the complement would be (-INF, 0). However the statement is actually "NOT([0,INF)) OR NOT(null)", and it should be evaluated to null.

Specified by:

getDimensionRangeSet in interface DimFilter

Parameters:

dimension - name of the dimension to get range for

Returns:

a RangeSet that represent the possible range of the input dimension, or null if it is not possible to determine for this DimFilter.

getRequiredColumns

public Set<String> getRequiredColumns()

Specified by:

getRequiredColumns in interface DimFilter

Returns:

a HashSet that represents all columns' name which the DimFilter required to do filter.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object