Package org.apache.druid.segment.filter

Class AndFilter

java.lang.Object

org.apache.druid.segment.filter.AndFilter

All Implemented Interfaces:

BooleanFilter, Filter

public class AndFilter
extends Object
implements BooleanFilter

Logical AND filter operation

Field Summary

Fields inherited from interface org.apache.druid.query.filter.BooleanFilter

EMPTY_VALUE_MATCHER_ARRAY

Constructor Summary

Constructors

Constructor	Description
AndFilter(LinkedHashSet<Filter> filters)
AndFilter(List<Filter> filters)

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.
static <T> ImmutableBitmap	getBitmapIndex(ColumnIndexSelector selector, BitmapResultFactory<T> bitmapResultFactory, List<Filter> filters)
LinkedHashSet<Filter>	getFilters()	Returns the child filters for this filter.
int	hashCode()
ValueMatcher	makeMatcher(ColumnIndexSelector selector, ColumnSelectorFactory columnSelectorFactory, RowOffsetMatcherFactory rowOffsetMatcherFactory)	Get a ValueMatcher that applies this filter to row values.
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.
Filter	rewriteRequiredColumns(Map<String,String> columnRewrites)	Return a copy of this filter that is identical to the this filter except that it operates on different columns, based on a renaming map where the key is the column to be renamed in the filter, and the value is the new column name.
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.BooleanFilter

getRequiredColumns, supportsSelectivityEstimation

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

estimateSelectivity

Constructor Detail

AndFilter

public AndFilter(LinkedHashSet<Filter> filters)

AndFilter

public AndFilter(List<Filter> filters)

Method Detail

getBitmapIndex

public static <T> ImmutableBitmap getBitmapIndex(ColumnIndexSelector selector,
                                                 BitmapResultFactory<T> bitmapResultFactory,
                                                 List<Filter> filters)

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

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.

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.

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

makeMatcher

public ValueMatcher makeMatcher(ColumnIndexSelector selector,
                                ColumnSelectorFactory columnSelectorFactory,
                                RowOffsetMatcherFactory rowOffsetMatcherFactory)

Description copied from interface: BooleanFilter

Get a ValueMatcher that applies this filter to row values. Unlike makeMatcher(ValueMatcherFactory), this method allows the Filter to utilize bitmap indexes. An implementation should either: - return a ValueMatcher that checks row values, using the provided ValueMatcherFactory - or, if possible, get a bitmap index for this filter using the ColumnIndexSelector, and return a ValueMatcher that checks the current row offset, created using the bitmap index.

Specified by:

makeMatcher in interface BooleanFilter

Parameters:

selector - Object used to retrieve bitmap indexes

columnSelectorFactory - Object used to select columns for making ValueMatchers

rowOffsetMatcherFactory - Object used to create RowOffsetMatchers

Returns:

ValueMatcher that applies this filter

getFilters

public LinkedHashSet<Filter> getFilters()

Description copied from interface: BooleanFilter

Returns the child filters for this filter. This is a LinkedHashSet because we don't want duplicates, but the order is also important in some cases (such as when filters are provided in an order that encourages short-circuiting.)

Specified by:

getFilters in interface BooleanFilter

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

rewriteRequiredColumns

public Filter rewriteRequiredColumns(Map<String,String> columnRewrites)

Description copied from interface: Filter

Return a copy of this filter that is identical to the this filter except that it operates on different columns, based on a renaming map where the key is the column to be renamed in the filter, and the value is the new column name. For example, if I have a filter (A = hello), and I have a renaming map (A -> B), this should return the filter (B = hello)

Specified by:

rewriteRequiredColumns in interface Filter

Parameters:

columnRewrites - Column rewrite map

Returns:

Copy of this filter that operates on new columns based on the rewrite map

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object