cloud-fan commented on a change in pull request #31676:
URL: https://github.com/apache/spark/pull/31676#discussion_r584453538
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/v2Commands.scala
##########
@@ -347,7 +347,7 @@ case class DescribeRelation(
partitionSpec: TablePartitionSpec,
isExtended: Boolean) extends Command {
override def children: Seq[LogicalPlan] = Seq(relation)
- override def output: Seq[Attribute] =
DescribeCommandSchema.describeTableAttributes()
+ override val output: Seq[Attribute] =
DescribeCommandSchema.describeTableAttributes()
Review comment:
Shall we follow others like `ShowTables` and put the `output` as a
parameter? Then it's more stable and the output won't after copy/transformation.
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/v2Commands.scala
##########
@@ -347,7 +347,7 @@ case class DescribeRelation(
partitionSpec: TablePartitionSpec,
isExtended: Boolean) extends Command {
override def children: Seq[LogicalPlan] = Seq(relation)
- override def output: Seq[Attribute] =
DescribeCommandSchema.describeTableAttributes()
+ override val output: Seq[Attribute] =
DescribeCommandSchema.describeTableAttributes()
Review comment:
Shall we follow others like `ShowTables` and put the `output` as a
parameter? Then it's more stable and the output won't change after
copy/transformation.
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