LeafNodes¶

LeafNode is an extension of the LogicalPlan abstraction for leaf logical operators (with no child nodes).

Implementations¶

• CTERelationRef
• DataSourceV2Relation
• DataSourceV2ScanRelation
• ExternalRDD
• HiveTableRelation
• InMemoryRelation
• LocalRelation
• LogicalQueryStage
• LogicalRDD
• LogicalRelation
• UnresolvedRelation
• others

Children¶

children: Seq[LogicalPlan]

children is an empty collection (to denote being a leaf in an operator tree).

children is part of the TreeNode abstraction.

Statistics¶

computeStats(): Statistics

computeStats throws an UnsupportedOperationException.

computeStats is used when:

• BasicStatsPlanVisitor is requested for the default size statistics (for LeafNodes)
• SizeInBytesOnlyStatsPlanVisitor is requested for the default size statistics