org.apache.calcite.adapter.spark

Class SparkRuntime

java.lang.Object

org.apache.calcite.adapter.spark.SparkRuntime

public abstract class SparkRuntime
extends Object

Runtime utilities for Calcite's Spark adapter. Generated code calls these methods.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SparkRuntime.CalciteFlatMapFunction<T,R> Combines linq4j Function and Spark FlatMapFunction.

Constructor Summary

Constructors

Modifier	Constructor and Description
private	SparkRuntime()

Method Summary

Methods

Modifier and Type	Method and Description
static <T> Enumerable<T>	asEnumerable(org.apache.spark.api.java.JavaRDD<T> rdd) Converts an RDD into an enumerable.
static <T> org.apache.spark.api.java.JavaRDD<T>	createRdd(org.apache.spark.api.java.JavaSparkContext sc, Enumerable<T> enumerable) Converts an enumerable into an RDD.
static <T> org.apache.spark.api.java.JavaRDD<T>	createRdd(org.apache.spark.api.java.JavaSparkContext sc, T[] ts) Converts an array into an RDD.
static org.apache.spark.api.java.JavaSparkContext	getSparkContext(DataContext root) Returns the Spark context for the current execution.

Methods inherited from class java.lang.Object

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

Constructor Detail

SparkRuntime

private SparkRuntime()

Method Detail

createRdd

public static <T> org.apache.spark.api.java.JavaRDD<T> createRdd(org.apache.spark.api.java.JavaSparkContext sc,
                                                 T[] ts)

Converts an array into an RDD.

createRdd

public static <T> org.apache.spark.api.java.JavaRDD<T> createRdd(org.apache.spark.api.java.JavaSparkContext sc,
                                                 Enumerable<T> enumerable)

Converts an enumerable into an RDD.

asEnumerable

public static <T> Enumerable<T> asEnumerable(org.apache.spark.api.java.JavaRDD<T> rdd)

Converts an RDD into an enumerable.

getSparkContext

public static org.apache.spark.api.java.JavaSparkContext getSparkContext(DataContext root)

Returns the Spark context for the current execution.

Currently a global variable; maybe later held within root.