[SPARK-30184] Implement a helper method for aliasing functions

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: SQL
• Assignee: Aman Omer
• Reporter: Aman Omer
• Created: 09/Dec/19 09:44
• Updated: 20/Dec/19 06:18
• Resolved: 20/Dec/19 06:18

Description

In PR https://github.com/apache/spark/pull/26712 , we have introduced expressionWithAlias function in FunctionRegistry.scala which forwards function name submitted at runtime.

This Jira is to use expressionWithAlias for remaining functions for which alias name can be used. Remaining functions are:
Average, First, Last, ApproximatePercentile, StddevSamp, VarianceSamp

Issue Links

• links to: GitHub Pull Request #26808