com.google.cloud.bigquery.connector.common

Class ReadSessionCreator

java.lang.Object

com.google.cloud.bigquery.connector.common.ReadSessionCreator

public class ReadSessionCreator
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_MAX_PARALLELISM
static int	DEFAULT_MIN_PARALLELISM_FACTOR
static int	MINIMAL_PARALLELISM

Constructor Summary

Constructors

Constructor and Description
ReadSessionCreator(ReadSessionCreatorConfig config, BigQueryClient bigQueryClient, BigQueryClientFactory bigQueryReadClientFactory)

Method Summary

Modifier and Type	Method and Description
ReadSessionResponse	create(com.google.cloud.bigquery.TableId table, com.google.common.collect.ImmutableList<String> selectedFields, Optional<String> filter) Creates a new ReadSession for parallel reads.
com.google.cloud.bigquery.TableInfo	getActualTable(com.google.cloud.bigquery.TableInfo table, com.google.common.collect.ImmutableList<String> requiredColumns, Optional<String> filter)
boolean	isInputTableAView(com.google.cloud.bigquery.TableInfo table)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_MAX_PARALLELISM

public static final int DEFAULT_MAX_PARALLELISM

See Also:

Constant Field Values

MINIMAL_PARALLELISM

public static final int MINIMAL_PARALLELISM

See Also:

Constant Field Values

DEFAULT_MIN_PARALLELISM_FACTOR

public static final int DEFAULT_MIN_PARALLELISM_FACTOR

See Also:

Constant Field Values

Constructor Detail

ReadSessionCreator

public ReadSessionCreator(ReadSessionCreatorConfig config,
                          BigQueryClient bigQueryClient,
                          BigQueryClientFactory bigQueryReadClientFactory)

Method Detail

create

public ReadSessionResponse create(com.google.cloud.bigquery.TableId table,
                                  com.google.common.collect.ImmutableList<String> selectedFields,
                                  Optional<String> filter)

Creates a new ReadSession for parallel reads.

Some attributes are governed by the ReadSessionCreatorConfig that this object was constructed with.

Parameters:

table - The table to create the session for.

selectedFields - Projection : the fields (e.g. columns) to return

filter - Selection: how to filter rows that match this filter

Returns:

ReadSessionResponse

getActualTable

public com.google.cloud.bigquery.TableInfo getActualTable(com.google.cloud.bigquery.TableInfo table,
                                                          com.google.common.collect.ImmutableList<String> requiredColumns,
                                                          Optional<String> filter)

isInputTableAView

public boolean isInputTableAView(com.google.cloud.bigquery.TableInfo table)