通过Spark-SQL获取JSON数据

Question

When i try to fetch the nested JSON data by using Spark-SQL query:

SparkContext sc = new SparkContext(new SparkConf().setAppName("sql").setMaster("local"));
SQLContext  sqlContext = new SQLContext(sc);
DataFrame df = sqlContext.read().json("path_to_s3_bucket").cache();
df.registerTempTable("table_name");
DataFrame d=sqlContext.sql("Select address.state as state from table_name");

I am getting th following exception

Exception in thread "main" org.apache.spark.sql.AnalysisException: Can't extract value from address

My Json data is like:-

"address":{"city":"xyz","state":"abc","country":"pqr"}

Please help in resolving the issue.

Answer 1

Your json is invalid. It should be: {"address":{"city":"xyz","state":"abc","country":"pqr"}}