org.apache.arrow.dataset.scanner

Interface Scanner

All Superinterfaces:

AutoCloseable

All Known Implementing Classes:

NativeScanner

public interface Scanner
extends AutoCloseable

A high level interface for scanning data over dataset.

Method Summary

Modifier and Type	Method and Description
Iterable<? extends ScanTask>	scan() Deprecated. use scanBatches() instead.
ArrowReader	scanBatches() Read the dataset as a stream of record batches.
Schema	schema() Get the schema of this Scanner.

Methods inherited from interface java.lang.AutoCloseable

close

Method Detail

scanBatches

ArrowReader scanBatches()

Read the dataset as a stream of record batches.

Returns:

a ArrowReader.

scan

@Deprecated
Iterable<? extends ScanTask> scan()

Deprecated. use scanBatches() instead.

Perform the scan operation.

Returns:

a iterable set of ScanTasks. Each task is considered independent and it is allowed to execute the tasks concurrently to gain better performance.

schema

Schema schema()

Get the schema of this Scanner.

Returns:

the schema instance