Package org.apache.pinot.segment.local.segment.index.readers

Class OnHeapDoubleDictionary

  • All Implemented Interfaces:
    Closeable, AutoCloseable, IndexReader, Dictionary
    public class OnHeapDoubleDictionary
extends BaseImmutableDictionary
    Implementation of double dictionary that cache all values on-heap.

    This is useful for double columns that:

    • Have low cardinality double dictionary where memory footprint on-heap is acceptably small
    • Is heavily queried

    This helps avoid creation of double from byte[].

    • Constructor Detail

      • OnHeapDoubleDictionary

        public OnHeapDoubleDictionary​(PinotDataBuffer dataBuffer,
                              int length)
        Constructor for the class. Populates the value <-> mappings.
        Parameters:
        dataBuffer - Pinot data buffer
        length - Length of the dictionary

    • Method Detail

      • indexOf

        public int indexOf​(double doubleValue)

      • insertionIndexOf

        public int insertionIndexOf​(String stringValue)

      • get

        public Double get​(int dictId)

      • getIntValue

        public int getIntValue​(int dictId)

      • getLongValue

        public long getLongValue​(int dictId)

      • getFloatValue

        public float getFloatValue​(int dictId)

      • getDoubleValue

        public double getDoubleValue​(int dictId)

      • getBigDecimalValue

        public BigDecimal getBigDecimalValue​(int dictId)

      • getStringValue

        public String getStringValue​(int dictId)