gatorsmile commented on a change in pull request #29202:
URL: https://github.com/apache/spark/pull/29202#discussion_r462053894
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/SetCommand.scala
##########
@@ -166,15 +166,21 @@ object SetCommand {
* via [[SetCommand]] will get reset to default value. Command that runs
* {{{
* reset;
+ * reset spark.sql.session.timeZone;
* }}}
*/
-case object ResetCommand extends RunnableCommand with IgnoreCachedData {
+case class ResetCommand(config: Option[String]) extends RunnableCommand with
IgnoreCachedData {
override def run(sparkSession: SparkSession): Seq[Row] = {
val conf = sparkSession.sessionState.conf
- conf.clear()
- sparkSession.sparkContext.conf.getAll.foreach { case (k, v) =>
- conf.setConfString(k, v)
+ val defaults = sparkSession.sparkContext.conf
+ config match {
+ case Some(key) =>
+ conf.unsetConf(key)
+ defaults.getOption(key).foreach(conf.setConfString(key, _))
Review comment:
Could you try some SQL conf whose default is NONE? For example,
spark.sql.optimizer.excludedRules?
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/SetCommand.scala
##########
@@ -166,15 +166,21 @@ object SetCommand {
* via [[SetCommand]] will get reset to default value. Command that runs
* {{{
* reset;
+ * reset spark.sql.session.timeZone;
* }}}
*/
-case object ResetCommand extends RunnableCommand with IgnoreCachedData {
+case class ResetCommand(config: Option[String]) extends RunnableCommand with
IgnoreCachedData {
override def run(sparkSession: SparkSession): Seq[Row] = {
val conf = sparkSession.sessionState.conf
- conf.clear()
- sparkSession.sparkContext.conf.getAll.foreach { case (k, v) =>
- conf.setConfString(k, v)
+ val defaults = sparkSession.sparkContext.conf
Review comment:
reset some static sql conf? for example, spark.sql.warehouse.dir? do we
block it with a reasonable exception message?
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