R: Access the Spark API

spark-api {sparklyr} | R Documentation

## Access the Spark API

### Description

Access the commonly-used Spark objects associated with a Spark instance. These objects provide access to different facets of the Spark API.

### Usage

    spark_context(sc)

    java_context(sc)

    hive_context(sc)

    spark_session(sc)

### Arguments

`sc` | A `spark_connection`.

### Details

The Scala API documentation is useful for discovering what methods are available for each of these objects. Use `invoke` to call methods on these objects.

### Spark Context

The main entry point for Spark functionality. The Spark Context represents the connection to a Spark cluster, and can be used to create `RDD`s, accumulators and broadcast variables on that cluster.

### Java Spark Context

A Java-friendly version of the aforementioned Spark Context.

### Hive Context

An instance of the Spark SQL execution engine that integrates with data stored in Hive. Configuration for Hive is read from `hive-site.xml` on the classpath.

Starting with Spark >= 2.0.0, the Hive Context class has been deprecated – it is superceded by the Spark Session class, and `hive_context` will return a Spark Session object instead. Note that both classes share a SQL interface, and therefore one can invoke SQL through these objects.

### Spark Session

Available since Spark 2.0.0, the Spark Session unifies the Spark Context and Hive Context classes into a single interface. Its use is recommended over the older APIs for code targeting Spark 2.0.0 and above.

[Package sparklyr version 0.5.4 Index]