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SparkSQL External Datasource简易使用之CSV

下载源码&编译:

git clone https://github.com/databricks/spark-csv.gitsbt/sbt package

 

Maven GAV:

groupId: com.databricks.sparkartifactId: spark-csv_2.10version: 0.1

 

$SPARK_HOME/conf/spark-env.sh

export SPARK_CLASSPATH=/home/spark/software/source/spark_package/spark-csv/target/scala-2.10/spark-csv-assembly-0.1.jar:$SPARK_CLASSPATH

 

测试数据下载:

wget https://github.com/databricks/spark-csv/raw/master/src/test/resources/cars.csv 

 

Scala API:

import org.apache.spark.sql.SQLContextval sqlContext = new SQLContext(sc)import com.databricks.spark.csv._val cars = sqlContext.csvFile("file:///home/spark/software/data/cars.csv")cars.collect

 

SQL:

CREATE TEMPORARY TABLE carsUSING com.databricks.spark.csvOPTIONS (path "file:///home/spark/software/data/cars.csv", header "true");select * from cars;

 

SparkSQL External Datasource简易使用之CSV