Package org.apache.druid.server

Enum ClientQuerySegmentWalkerUtils.SubqueryResultLimit

java.lang.Object

java.lang.Enum<ClientQuerySegmentWalkerUtils.SubqueryResultLimit>

org.apache.druid.server.ClientQuerySegmentWalkerUtils.SubqueryResultLimit

All Implemented Interfaces:

Serializable, Comparable<ClientQuerySegmentWalkerUtils.SubqueryResultLimit>

Enclosing class:

ClientQuerySegmentWalkerUtils

public static enum ClientQuerySegmentWalkerUtils.SubqueryResultLimit
extends Enum<ClientQuerySegmentWalkerUtils.SubqueryResultLimit>

Guardrail type on the subquery's results

Enum Constant Summary

Enum Constants

Enum Constant	Description
MEMORY_LIMIT	Subqueries limited by the BYTE_LIMIT are materialized as Frames on heap.
ROW_LIMIT	Subqueries limited by the ROW_LIMIT are materialized and kept as arrays (native java objects) on heap.

Method Summary

Modifier and Type	Method	Description
abstract ResultSerializationMode	serializationMode()
static ClientQuerySegmentWalkerUtils.SubqueryResultLimit	valueOf(String name)	Returns the enum constant of this type with the specified name.
static ClientQuerySegmentWalkerUtils.SubqueryResultLimit[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

ROW_LIMIT

public static final ClientQuerySegmentWalkerUtils.SubqueryResultLimit ROW_LIMIT

Subqueries limited by the ROW_LIMIT are materialized and kept as arrays (native java objects) on heap. The walker ensures that the cumulative number of rows of the results of subqueries of the given query donot exceed the limit specified in the context or as the server default

MEMORY_LIMIT

public static final ClientQuerySegmentWalkerUtils.SubqueryResultLimit MEMORY_LIMIT

Subqueries limited by the BYTE_LIMIT are materialized as Frames on heap. Frames depict the byte representation of the subquery results and hence the space consumed by the frames can be trivially fetched. The walker ensures that the cumulative number of rows of the results of subqueries (materialized as Frames in the broker memory) of a given query do not exceed the limit specified in the context or as the server default

Method Details

values

public static ClientQuerySegmentWalkerUtils.SubqueryResultLimit[] values()

Returns an array containing the constants of this enum type, in the order they are declared.

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ClientQuerySegmentWalkerUtils.SubqueryResultLimit valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

serializationMode

public abstract ResultSerializationMode serializationMode()