[SPARK-25223] Use a map to store values for NamedLambdaVariable.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Won't Do
• Affects Version/s: 2.4.0
• Component/s: SQL
• Assignee: Unassigned
• Reporter: Takuya Ueshin
• Created: 24/Aug/18 10:17
• Updated: 25/Aug/18 00:38
• Resolved: 25/Aug/18 00:38

Description

Currently we use functionsForEval, NamedLambdaVarible s in which are replace with of arguments from the original functions, to make sure the lambda variables refer the same instances as of arguments, but it's pretty hacky.
Instead, we can use a global map and set/get the lambda variable values in the map.

Issue Links

• links to: [Github] Pull Request #22216 (ueshin)