Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/3431#discussion_r21939724
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/json/JSONRelation.scala ---
@@ -18,31 +18,38 @@
package org.apache.spark.sql.json
import org.apache.spark.sql.SQLContext
+import org.apache.spark.sql.catalyst.types.StructType
import org.apache.spark.sql.sources._
private[sql] class DefaultSource extends RelationProvider {
/** Returns a new base relation with the given parameters. */
override def createRelation(
sqlContext: SQLContext,
- parameters: Map[String, String]): BaseRelation = {
+ parameters: Map[String, String],
+ schema: Option[StructType]): BaseRelation = {
val fileName = parameters.getOrElse("path", sys.error("Option 'path'
not specified"))
val samplingRatio =
parameters.get("samplingRatio").map(_.toDouble).getOrElse(1.0)
- JSONRelation(fileName, samplingRatio)(sqlContext)
+ JSONRelation(fileName, samplingRatio, schema)(sqlContext)
}
}
-private[sql] case class JSONRelation(fileName: String, samplingRatio:
Double)(
+private[sql] case class JSONRelation(
+ fileName: String,
+ samplingRatio: Double,
+ _schema: Option[StructType])(
--- End diff --
instead of `_schema`, how about `userSpecifiedSchema`?
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