Package org.apache.druid.frame.read.columnar

Interface FrameColumnReader

All Known Implementing Classes:
ComplexFrameColumnReader, DoubleArrayFrameColumnReader, DoubleFrameColumnReader, FloatArrayFrameColumnReader, FloatFrameColumnReader, LongArrayFrameColumnReader, LongFrameColumnReader, NumericArrayFrameColumnReader, StringArrayFrameColumnReader, StringFrameColumnReader, UnsupportedColumnTypeFrameColumnReader
public interface FrameColumnReader
Embeds the logic to read a specific column from frames with a specific RowSignature. Stateless and immutable, so it can be shared between multiple frame readers as long as all frames have the same signature.

  • Method Details

    • readRACColumn

      Column readRACColumn(Frame frame)
      Returns a Column from the frame.

    • readColumn

      ColumnPlus readColumn(Frame frame)
      Returns a column reference for the provided frame.