Package org.apache.druid.segment.filter

Class ExpressionFilter

java.lang.Object

org.apache.druid.segment.filter.ExpressionFilter

All Implemented Interfaces:

Filter

public class ExpressionFilter
extends Object
implements Filter

Constructor Summary

Constructors

Constructor	Description
ExpressionFilter(com.google.common.base.Supplier<Expr> expr, FilterTuning filterTuning)

Method Summary

Modifier and Type	Method	Description
boolean	canVectorizeMatcher(ColumnInspector inspector)	Returns true if this filter can produce a vectorized matcher from its "makeVectorMatcher" method.
boolean	equals(Object o)
BitmapColumnIndex	getBitmapColumnIndex(ColumnIndexSelector selector)	Returns a BitmapColumnIndex if this filter supports using a bitmap index for filtering for the given input ColumnIndexSelector.
Set<String>	getRequiredColumns()	Set of columns used by a filter.
int	hashCode()
ValueMatcher	makeMatcher(ColumnSelectorFactory factory)	Get a ValueMatcher that applies this filter to row values.
VectorValueMatcher	makeVectorMatcher(VectorColumnSelectorFactory factory)	Get a VectorValueMatcher that applies this filter to row vectors.
boolean	supportsRequiredColumnRewrite()	Returns true is this filter is able to return a copy of this filter that is identical to this filter except that it operates on different columns, based on a renaming map.
String	toString()

Methods inherited from class java.lang.Object

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

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

makeFilterBundle, rewriteRequiredColumns

Constructor Details

ExpressionFilter

public ExpressionFilter(com.google.common.base.Supplier<Expr> expr,
 FilterTuning filterTuning)

Method Details

canVectorizeMatcher

public boolean canVectorizeMatcher(ColumnInspector inspector)

Description copied from interface: Filter

Returns true if this filter can produce a vectorized matcher from its "makeVectorMatcher" method.

Specified by:

canVectorizeMatcher in interface Filter

Parameters:

inspector - Supplies type information for the selectors this filter will match against

makeVectorMatcher

public VectorValueMatcher makeVectorMatcher(VectorColumnSelectorFactory factory)

Description copied from interface: Filter

Get a VectorValueMatcher that applies this filter to row vectors.

Specified by:

makeVectorMatcher in interface Filter

Parameters:

factory - Object used to create ValueMatchers

Returns:

VectorValueMatcher that applies this filter to row vectors.

makeMatcher

public ValueMatcher makeMatcher(ColumnSelectorFactory factory)

Description copied from interface: Filter

Get a ValueMatcher that applies this filter to row values.

Specified by:

makeMatcher in interface Filter

Parameters:

factory - Object used to create ValueMatchers

Returns:

ValueMatcher that applies this filter to row values.

getBitmapColumnIndex

@Nullable
public BitmapColumnIndex getBitmapColumnIndex(ColumnIndexSelector selector)

Description copied from interface: Filter

Returns a BitmapColumnIndex if this filter supports using a bitmap index for filtering for the given input ColumnIndexSelector. The BitmapColumnIndex can be used to compute into a bitmap indicating rows that match this filter result BitmapColumnIndex.computeBitmapResult(BitmapResultFactory, boolean), or examine details about the index prior to computing it, via BitmapColumnIndex.getIndexCapabilities().

Specified by:

getBitmapColumnIndex in interface Filter

Parameters:

selector - Object used to create BitmapColumnIndex

Returns:

BitmapColumnIndex that can build ImmutableBitmap of matched row numbers

getRequiredColumns

public Set<String> getRequiredColumns()

Description copied from interface: Filter

Set of columns used by a filter.

Specified by:

getRequiredColumns in interface Filter

supportsRequiredColumnRewrite

public boolean supportsRequiredColumnRewrite()

Description copied from interface: Filter

Returns true is this filter is able to return a copy of this filter that is identical to this filter except that it operates on different columns, based on a renaming map.

Specified by:

supportsRequiredColumnRewrite in interface 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