Package com.twilio.kudu.sql

Class NestedJoinFactory

java.lang.Object

com.twilio.kudu.sql.NestedJoinFactory

All Implemented Interfaces:

org.apache.calcite.linq4j.function.Function<org.apache.calcite.linq4j.Enumerable<Object>>, org.apache.calcite.linq4j.function.Function1<List<Object>,org.apache.calcite.linq4j.Enumerable<Object>>

public final class NestedJoinFactory
extends Object
implements org.apache.calcite.linq4j.function.Function1<List<Object>,org.apache.calcite.linq4j.Enumerable<Object>>

NestedJoinFactory is an implementation of Function1 that returns an Enumerable for the Right hand side of a nested join.

This implementation uses a cache to hold objects from the scan to prevent going creating AsyncKuduScanner for repeated rows

Field Summary

Fields inherited from interface org.apache.calcite.linq4j.function.Function1

IDENTITY

Constructor Summary

Constructors

Constructor	Description
NestedJoinFactory(int capacity, List<TranslationPredicate> rowTranslators, CloneableEnumerable<Object> rootEnumerable)	Create a Factory that produces Enumerable that can cache results from previous calls

Method Summary

Modifier and Type	Method	Description
org.apache.calcite.linq4j.Enumerable<Object>	apply(List<Object> batchFromLeftTable)

Methods inherited from class java.lang.Object

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

Constructor Details

NestedJoinFactory

public NestedJoinFactory(int capacity,
 List<TranslationPredicate> rowTranslators,
 CloneableEnumerable<Object> rootEnumerable)

Create a Factory that produces Enumerable that can cache results from previous calls

Parameters:

capacity - size of the RPC cache

rowTranslators - bindable predicates that depend on the row from the left side of the join

rootEnumerable - base enumerable that will be CloneableEnumerable.clone(List)

Method Details

apply

public org.apache.calcite.linq4j.Enumerable<Object> apply(List<Object> batchFromLeftTable)

Specified by:

apply in interface org.apache.calcite.linq4j.function.Function1<List<Object>,org.apache.calcite.linq4j.Enumerable<Object>>