Package org.apache.druid.segment.projections

Class ConstantTimeColumn

java.lang.Object
org.apache.druid.segment.projections.ConstantTimeColumn
All Implemented Interfaces:
Closeable, AutoCloseable, HotLoopCallee, BaseColumn, NumericColumn, SelectableColumn
public class ConstantTimeColumn extends Object implements NumericColumn

  • Constructor Details

    • ConstantTimeColumn

      public ConstantTimeColumn(int numRows, long constant)

  • Method Details

    • makeConstantTimeSupplier

      public static com.google.common.base.Supplier<BaseColumnHolder> makeConstantTimeSupplier(int numRows, long constant)

    • length

      public int length()
      Description copied from interface: NumericColumn
      Returns the row count of this column. Note that this method currently counts only non-null values. Using this method to get the length of a column that contains nulls will not work as expected. This method should be used only for non-nullable numeric columns such as the "__time" column.
      Specified by:
      length in interface NumericColumn

    • getLongSingleValueRow

      public long getLongSingleValueRow(int rowNum)
      Specified by:
      getLongSingleValueRow in interface NumericColumn

    • close

      public void close()
      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface Closeable
      Specified by:
      close in interface NumericColumn

    • inspectRuntimeShape

      public void inspectRuntimeShape(RuntimeShapeInspector inspector)
      Description copied from interface: HotLoopCallee
      Implementations of this method should call inspector.visit() with all fields of this class, which meet two conditions: 1. They are used in methods of this class, annotated with CalledFromHotLoop 2. They are either: a. Nullable objects b. Instances of HotLoopCallee c. Objects, which don't always have a specific class in runtime. For example, a field of type Set could be HashSet or TreeSet in runtime, depending on how this instance (the instance on which inspectRuntimeShape() is called) is configured. d. ByteBuffer or similar objects, where byte order matters e. boolean flags, affecting branch taking f. Arrays of objects, meeting any of conditions a-e.
      Specified by:
      inspectRuntimeShape in interface HotLoopCallee

    • makeColumnValueSelector

      public ColumnValueSelector<?> makeColumnValueSelector(ReadableOffset offset)
      Specified by:
      makeColumnValueSelector in interface BaseColumn

    • makeVectorValueSelector

      public VectorValueSelector makeVectorValueSelector(ReadableVectorOffset offset)
      Specified by:
      makeVectorValueSelector in interface BaseColumn