Package com.mongodb.spark.sql.connector.read

Class MongoScanBuilder

java.lang.Object

com.mongodb.spark.sql.connector.read.MongoScanBuilder

All Implemented Interfaces:

ScanBuilder, SupportsPushDownFilters, SupportsPushDownRequiredColumns

public class MongoScanBuilder
extends java.lang.Object
implements ScanBuilder, SupportsPushDownFilters, SupportsPushDownRequiredColumns

A builder for a MongoScan.

Constructor Summary

Constructors

Constructor	Description
MongoScanBuilder(StructType schema, ReadConfig readConfig)	Construct a new instance

Method Summary

Modifier and Type	Method	Description
Scan	build()
void	pruneColumns(StructType requiredSchema)
Filter[]	pushedFilters()
Filter[]	pushFilters(Filter[] filters)	Processes filters on the dataset.

Methods inherited from class java.lang.Object

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

Constructor Detail

MongoScanBuilder

public MongoScanBuilder(StructType schema,
                        ReadConfig readConfig)

Construct a new instance

Parameters:

schema - the schema to use for the read

readConfig - the configuration for the read

Method Detail

build

public Scan build()

Specified by:

build in interface ScanBuilder

Returns:

the MongoScan for the configured scan

pushFilters

public Filter[] pushFilters(Filter[] filters)

Processes filters on the dataset.

Sets any filters that can be pushed down into an aggregation `$match` pipeline stage.

Specified by:

pushFilters in interface SupportsPushDownFilters

Parameters:

filters - data filters

Returns:

any filters for Spark to process

pushedFilters

public Filter[] pushedFilters()

Specified by:

pushedFilters in interface SupportsPushDownFilters

Returns:

any filters that have been converted into an aggregation pipeline.

pruneColumns

public void pruneColumns(StructType requiredSchema)

Specified by:

pruneColumns in interface SupportsPushDownRequiredColumns