[SPARK-45755] Push down limit through Dataset.isEmpty()

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: SQL
• Labels: pull-request-available
• Assignee: Yuming Wang
• Reporter: Yuming Wang
• Created: 01/Nov/23 05:51
• Updated: 01/Nov/23 11:26
• Resolved: 01/Nov/23 11:25

Description

Push down LocalLimit can not optimize the case of distinct.

  def isEmpty: Boolean = withAction("isEmpty",
    withTypedPlan { LocalLimit(Literal(1), select().logicalPlan) }.queryExecution) { plan =>
    plan.executeTake(1).isEmpty
  }

Issue Links

• links to: GitHub Pull Request #43617