Package org.apache.druid.segment.filter
Class IsBooleanFilter
- java.lang.Object
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- org.apache.druid.segment.filter.IsBooleanFilter
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- All Implemented Interfaces:
Filter
public class IsBooleanFilter extends Object implements Filter
SQL three-value logic wrapper for some childFilter
to implement '{filter} IS TRUE' and '{filter} IS FALSE'. Primarily useful when living beneath aNotFilter
because this filter purposely ignores the value ofincludeUnknown
and so always correctly only returns values that definitely match or do not match the filter to produce correct results for '{filter} IS NOT TRUE' and '{filter} IS NOT FALSE'. This filter is a relatively thin wrapper, so should be relatively harmless if used without a 'NOT' filter.- See Also:
IsBooleanDimFilter
,IsTrueDimFilter
,IsFalseDimFilter
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Constructor Summary
Constructors Constructor Description IsBooleanFilter(Filter baseFilter, boolean isTrue)
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Method Summary
All Methods Instance Methods Concrete Methods 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 aBitmapColumnIndex
if this filter supports using a bitmap index for filtering for the given inputColumnIndexSelector
.Set<String>
getRequiredColumns()
Set of columns used by a filter.int
hashCode()
ValueMatcher
makeMatcher(ColumnSelectorFactory factory)
Get aValueMatcher
that applies this filter to row values.VectorValueMatcher
makeVectorMatcher(VectorColumnSelectorFactory factory)
Get aVectorValueMatcher
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.boolean
supportsSelectivityEstimation(ColumnSelector columnSelector, ColumnIndexSelector indexSelector)
Indicates whether this filter supports selectivity estimation.String
toString()
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.apache.druid.query.filter.Filter
estimateSelectivity
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Constructor Detail
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IsBooleanFilter
public IsBooleanFilter(Filter baseFilter, boolean isTrue)
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Method Detail
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getBitmapColumnIndex
@Nullable public BitmapColumnIndex getBitmapColumnIndex(ColumnIndexSelector selector)
Description copied from interface:Filter
Returns aBitmapColumnIndex
if this filter supports using a bitmap index for filtering for the given inputColumnIndexSelector
. TheBitmapColumnIndex
can be used to compute into a bitmap indicating rows that match this filter resultBitmapColumnIndex.computeBitmapResult(BitmapResultFactory, boolean)
, or examine details about the index prior to computing it, viaBitmapColumnIndex.getIndexCapabilities()
.- Specified by:
getBitmapColumnIndex
in interfaceFilter
- Parameters:
selector
- Object used to create BitmapColumnIndex- Returns:
- BitmapColumnIndex that can build ImmutableBitmap of matched row numbers
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makeMatcher
public ValueMatcher makeMatcher(ColumnSelectorFactory factory)
Description copied from interface:Filter
Get aValueMatcher
that applies this filter to row values.- Specified by:
makeMatcher
in interfaceFilter
- Parameters:
factory
- Object used to create ValueMatchers- Returns:
- ValueMatcher that applies this filter to row values.
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makeVectorMatcher
public VectorValueMatcher makeVectorMatcher(VectorColumnSelectorFactory factory)
Description copied from interface:Filter
Get aVectorValueMatcher
that applies this filter to row vectors.- Specified by:
makeVectorMatcher
in interfaceFilter
- Parameters:
factory
- Object used to create ValueMatchers- Returns:
- VectorValueMatcher that applies this filter to row vectors.
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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 interfaceFilter
- Parameters:
inspector
- Supplies type information for the selectors this filter will match against
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getRequiredColumns
public Set<String> getRequiredColumns()
Description copied from interface:Filter
Set of columns used by a filter.- Specified by:
getRequiredColumns
in interfaceFilter
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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 interfaceFilter
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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 interfaceFilter
- Parameters:
columnRewrites
- Column rewrite map- Returns:
- Copy of this filter that operates on new columns based on the rewrite map
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supportsSelectivityEstimation
public boolean supportsSelectivityEstimation(ColumnSelector columnSelector, ColumnIndexSelector indexSelector)
Description copied from interface:Filter
Indicates whether this filter supports selectivity estimation. A filter supports selectivity estimation if it supports bitmap index and the dimension which the filter evaluates does not have multi values.- Specified by:
supportsSelectivityEstimation
in interfaceFilter
- Parameters:
columnSelector
- Object to check the dimension has multi values.indexSelector
- Object used to retrieve bitmap indexes- Returns:
- true if this Filter supports selectivity estimation, false otherwise.
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