[SPARK-16756] Add `sql` function to LogicalPlan and `NonSQLPlan` trait

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Component/s: SQL
• Assignee: Unassigned
• Reporter: Dongjoon Hyun
• Created: 27/Jul/16 20:31
• Updated: 01/Nov/16 21:53
• Resolved: 01/Nov/16 21:53

Description

Like `Expression`, this issue adds `sql` function for `LogicalPlan` and `NonSQLPlan` trait. The method will be `abstract` method. All logical plan should implement that or use trait `NonSQLPlan` explicitly.

/**
 * Returns SQL representation of this plan. For the plans extending [[NonSQLPlan]],
 * this method may return an arbitrary user facing string.
 */
def sql: String

Issue Links

• relates to: SPARK-18209 More robust view canonicalization without full SQL expansion
• links to: [Github] Pull Request #14435 (dongjoon-hyun)