Class VectorizedArrowReader.ConstantVectorReader<T>

  • Type Parameters:
    T - The constant value to use
    All Implemented Interfaces:
    Enclosing class:

    public static class VectorizedArrowReader.ConstantVectorReader<T>
    extends VectorizedArrowReader
    A Dummy Vector Reader which doesn't actually read files, instead it returns a dummy VectorHolder which indicates the constant value which should be used for this column.
    • Constructor Detail

      • ConstantVectorReader

        public ConstantVectorReader​(T value)
    • Method Detail

      • read

        public VectorHolder read​(VectorHolder reuse,
                                 int numValsToRead)
        Description copied from interface: VectorizedReader
        Reads a batch of type @param <T> and of size numRows
        Specified by:
        read in interface VectorizedReader<T>
        read in class VectorizedArrowReader
        reuse - container for the last batch to be reused for next batch
        numValsToRead - number of rows to read
        batch of records of type @param <T>
      • setRowGroupInfo

        public void setRowGroupInfo​( source,
                                    java.util.Map<org.apache.parquet.hadoop.metadata.ColumnPath,​org.apache.parquet.hadoop.metadata.ColumnChunkMetaData> metadata,
                                    long rowPosition)
        Description copied from interface: VectorizedReader
        Sets the row group information to be used with this reader
        Specified by:
        setRowGroupInfo in interface VectorizedReader<T>
        setRowGroupInfo in class VectorizedArrowReader
        source - row group information for all the columns
        metadata - map of ColumnPath -> ColumnChunkMetaData for the row group
        rowPosition - the row group's row offset in the parquet file