Package org.apache.druid.segment.index

Class SimpleImmutableBitmapIndex

    • Constructor Detail

      • SimpleImmutableBitmapIndex

        public SimpleImmutableBitmapIndex​(ImmutableBitmap bitmap)

    • Method Detail

      • estimatedComputeCost

        public int estimatedComputeCost()
        Description copied from interface: BitmapColumnIndex
        Returns an estimated cost for computing the bitmap result. Generally this is equivalent to number of bitmap union or intersection operations need to be performed. E.x. null value index bitmap has a cost of 0, non-null value index bitmap union with null bitmap has a cost of 1, range (size of 10) scanning index bitmap union with null bitmap has a cost of 10.

      • computeBitmapResult

        public <T> T computeBitmapResult​(BitmapResultFactory<T> bitmapResultFactory,
                                 boolean includeUnknown)
        Description copied from interface: BitmapColumnIndex
        Compute a bitmap result wrapped with the BitmapResultFactory representing the rows matched by this index. If building a cursor, use BitmapColumnIndex.computeBitmapResult(BitmapResultFactory, int, int, boolean) instead.
        Parameters:
        bitmapResultFactory - helper to format the ImmutableBitmap in a form ready for consumption by callers
        includeUnknown - mapping for Druid native two state logic system into SQL three-state logic system. If set to true, bitmaps returned by this method should include true bits for any rows where the matching result is 'unknown', such as from the input being null valued.
        Returns:
        bitmap result representing rows matched by this index