[SPARK-22529] Relation stats should be consistent with other plans based on cbo config

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.3.0
• Component/s: SQL
• Assignee: Zhenhua Wang
• Reporter: Zhenhua Wang
• Created: 15/Nov/17 14:40
• Updated: 27/Nov/17 17:14
• Resolved: 27/Nov/17 17:14

Description

Currently, relation stats is the same whether cbo is enabled or not. While relation (`LogicalRelation` or `HiveTableRelation`) is a `LogicalPlan`, this behavior makes it inconsistent with other plans. This can cause confusion when user runs EXPLAIN COST commands. Besides, when CBO is disabled, we apply the size-only estimation strategy, so there's no need to propagate other statistics to relation.

Issue Links

• links to: [Github] Pull Request #19757 (wzhfy)