Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/12830#discussion_r61805011
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/SparkSession.scala
---
@@ -635,6 +642,122 @@ class SparkSession private(
object SparkSession {
+ /**
+ * Builder for [[SparkSession]].
+ */
+ class Builder {
+
+ private[this] val options = new
scala.collection.mutable.HashMap[String, String]
+
+ /**
+ * Sets a name for the application, which will be shown in the Spark
web UI.
+ *
+ * @since 2.0.0
+ */
+ def appName(name: String): Builder = config("spark.app.name", name)
+
+ /**
+ * Sets a config option. Options set using this method are
automatically propagated to
+ * both [[SparkConf]] and SparkSession's own configuration.
+ *
+ * @since 2.0.0
+ */
+ def config(key: String, value: String): Builder = synchronized {
+ options += key -> value
+ this
+ }
+
+ /**
+ * Sets a config option. Options set using this method are
automatically propagated to
+ * both [[SparkConf]] and SparkSession's own configuration.
+ *
+ * @since 2.0.0
+ */
+ def config(key: String, value: Long): Builder = synchronized {
+ options += key -> value.toString
+ this
+ }
+
+ /**
+ * Sets a config option. Options set using this method are
automatically propagated to
+ * both [[SparkConf]] and SparkSession's own configuration.
+ *
+ * @since 2.0.0
+ */
+ def config(key: String, value: Double): Builder = synchronized {
+ options += key -> value.toString
+ this
+ }
+
+ /**
+ * Sets a config option. Options set using this method are
automatically propagated to
+ * both [[SparkConf]] and SparkSession's own configuration.
+ *
+ * @since 2.0.0
+ */
+ def config(key: String, value: Boolean): Builder = synchronized {
+ options += key -> value.toString
+ this
+ }
+
+ /**
+ * Sets a list of config options based on the given [[SparkConf]].
+ *
+ * @since 2.0.0
+ */
+ def config(conf: SparkConf): Builder = synchronized {
+ conf.getAll.foreach { case (k, v) => options += k -> v }
+ this
+ }
+
+ /**
+ * Sets the Spark master URL to connect to, such as "local" to run
locally, "local[4]" to
+ * run locally with 4 cores, or "spark://master:7077" to run on a
Spark standalone cluster.
+ *
+ * @since 2.0.0
+ */
+ def master(master: String): Builder = config("spark.master", master)
+
+ /**
+ * Enables Hive support, including connectivity to a persistent Hive
metastore, support for
+ * Hive serdes, and Hive user-defined functions.
+ *
+ * @return 2.0.0
+ */
+ def enableHiveSupport(): Builder = synchronized {
+ if (hiveClassesArePresent) {
+ config(CATALOG_IMPLEMENTATION.key, "hive")
+ } else {
+ throw new IllegalArgumentException(
+ "Unable to instantiate SparkSession with Hive support because " +
+ "Hive classes are not found.")
+ }
--- End diff --
probably as a separate pr
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