Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/999#discussion_r13520443
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala ---
@@ -98,6 +99,41 @@ class SQLContext(@transient val sparkContext:
SparkContext)
new SchemaRDD(this, parquet.ParquetRelation(path))
/**
+ * Loads a JSON file, returning the result as a [[SchemaRDD]].
+ * Right now, we only do eager schema resolution.
+ */
+ def jsonFile(
+ path: String,
+ mode: SchemaResolutionMode = EAGER_SCHEMA_RESOLUTION): SchemaRDD = {
+ logger.info(s"Loads a JSON file $path.")
+ val json = sparkContext.textFile(path)
+ jsonRDD(json, mode)
+ }
+
+ /**
+ * Loads a RDD[String] storing JSON objects (one object per record),
+ * returning the result as a [[SchemaRDD]].
+ * Right now, we only do eager schema resolution.
+ */
+ def jsonRDD(
+ json: RDD[String],
+ mode: SchemaResolutionMode = EAGER_SCHEMA_RESOLUTION): SchemaRDD = {
+ mode match {
+ case EAGER_SCHEMA_RESOLUTION =>
+ logger.info(s"Eagerly resolve the schema without sampling.")
+ val logicalPlan = JsonTable.inferSchema(json)
+ logicalPlanToSparkQuery(logicalPlan)
+ case EAGER_SCHEMA_RESOLUTION_WITH_SAMPLING(fraction) =>
+ logger.info(s"Eagerly resolve the schema with sampling " +
+ s"(sampling fraction: $fraction).")
+ val logicalPlan = JsonTable.inferSchema(json, Some(fraction))
+ logicalPlanToSparkQuery(logicalPlan)
+ case LAZY_SCHEMA_RESOLUTION =>
--- End diff --
Perhaps we should just leave this out so users will get compile errors
instead of runtime errors.
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