org.apache.calcite.adapter.spark

类 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.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	SparkRuntime.CalciteFlatMapFunction<T,R> Combines linq4j Function and Spark FlatMapFunction.

方法概要

限定符和类型	方法和说明
static <T> org.apache.calcite.linq4j.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, org.apache.calcite.linq4j.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(org.apache.calcite.DataContext root) Returns the Spark context for the current execution.

从类继承的方法 java.lang.Object

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

方法详细资料

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,
                                                                 org.apache.calcite.linq4j.Enumerable<T> enumerable)

Converts an enumerable into an RDD.

asEnumerable

public static <T> org.apache.calcite.linq4j.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(org.apache.calcite.DataContext root)

Returns the Spark context for the current execution.

Currently a global variable; maybe later held within root.