io.delta.standalone

Interface Snapshot

public interface Snapshot

Snapshot provides APIs to access the Delta table state (such as table metadata, active files) at some version.

See Delta Transaction Log Protocol for more details about the transaction logs.

Method Summary

Modifier and Type	Method and Description
java.util.List<AddFile>	getAllFiles()
Metadata	getMetadata()
long	getVersion()
CloseableIterator<RowRecord>	open() Creates a CloseableIterator which can iterate over data belonging to this snapshot.
DeltaScan	scan()
DeltaScan	scan(Expression predicate)

Method Detail

scan

DeltaScan scan()

Returns:

a DeltaScan of the files in this snapshot

scan

DeltaScan scan(Expression predicate)

Parameters:

predicate - the predicate to be used to filter the files in this snapshot.

Returns:

a DeltaScan of the files in this snapshot matching the pushed portion of predicate

getAllFiles

java.util.List<AddFile> getAllFiles()

Returns:

all of the files present in this snapshot

getMetadata

Metadata getMetadata()

Returns:

the table metadata for this snapshot

getVersion

long getVersion()

Returns:

the version for this snapshot

open

CloseableIterator<RowRecord> open()

Creates a CloseableIterator which can iterate over data belonging to this snapshot. It provides no iteration ordering guarantee among data.

Returns:

a CloseableIterator to iterate over data