Package org.apache.arrow.datafusion

Interface DataFrame

public interface DataFrame
A dataframe is a rectangle shaped data that holds columns and rows, and can be collected into batches and read via reader.

  • Method Summary

    Modifier and Type Method Description
    java.util.concurrent.CompletableFuture<org.apache.arrow.vector.ipc.ArrowReader> collect​(org.apache.arrow.memory.BufferAllocator allocator)
    Collect dataframe into a list of record batches
    long getPointer()  
    java.util.concurrent.CompletableFuture<java.lang.Void> show()
    Print results.

  • Method Details

    • collect

      java.util.concurrent.CompletableFuture<org.apache.arrow.vector.ipc.ArrowReader> collect​(org.apache.arrow.memory.BufferAllocator allocator)
      Collect dataframe into a list of record batches
      Parameters:
      allocator - buffer allocator to allocate vectors within Reader
      Returns:
      reader instance to extract the data, you are expected to ArrowReader.close() it after usage to release memory

    • show

      java.util.concurrent.CompletableFuture<java.lang.Void> show()
      Print results.
      Returns:
      null

    • getPointer

      long getPointer()