io.delta.kernel.internal

Class ScanBuilderImpl

Object

io.delta.kernel.internal.ScanBuilderImpl

All Implemented Interfaces:

ScanBuilder

public class ScanBuilderImpl
extends Object
implements ScanBuilder

Implementation of ScanBuilder.

Constructor Summary

Constructors

Constructor and Description
ScanBuilderImpl(Path dataPath, Protocol protocol, Metadata metadata, StructType snapshotSchema, LogReplay logReplay, Engine engine)

Method Summary

Modifier and Type	Method and Description
Scan	build()
ScanBuilder	withFilter(Engine engine, Predicate predicate) Apply the given filter expression to prune any files that do not contain data satisfying the given filter.
ScanBuilder	withReadSchema(Engine engine, StructType readSchema) Apply the given readSchema.

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ScanBuilderImpl

public ScanBuilderImpl(Path dataPath,
                       Protocol protocol,
                       Metadata metadata,
                       StructType snapshotSchema,
                       LogReplay logReplay,
                       Engine engine)

Method Detail

withFilter

public ScanBuilder withFilter(Engine engine,
                              Predicate predicate)

Description copied from interface: ScanBuilder

Apply the given filter expression to prune any files that do not contain data satisfying the given filter.

Specified by:

withFilter in interface ScanBuilder

Parameters:

engine - Engine instance to use in Delta Kernel.

predicate - a Predicate to prune the metadata or data.

Returns:

A ScanBuilder with filter applied.

withReadSchema

public ScanBuilder withReadSchema(Engine engine,
                                  StructType readSchema)

Description copied from interface: ScanBuilder

Apply the given readSchema. If the builder already has a projection applied, calling this again replaces the existing projection.

Specified by:

withReadSchema in interface ScanBuilder

Parameters:

engine - Engine instance to use in Delta Kernel.

readSchema - Subset of columns to read from the Delta table.

Returns:

A ScanBuilder with projection pruning.

build

public Scan build()

Specified by:

build in interface ScanBuilder

Returns:

Build the instance