[HIVE-26314] Support alter function in Hive DDL

• Type: Task
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 4.0.0-alpha-1
• Component/s: Hive
• Labels: pull-request-available
• Target Version/s: 4.0.0-alpha-2
• Assignee: Wechar
• Reporter: Wechar
• Created: 10/Jun/22 15:14
• Updated: 21/Oct/22 07:20

Description

Hive SQL does not support ALTER FUNCTION yet, we can refer to the CREATE [OR REPLACE] FUNCTION of Spark to implement the alter function .

CREATE [ TEMPORARY ] FUNCTION [ OR REPLACE ] [IF NOT EXISTS ]
  [db_name.]function_name AS class_name
  [USING JAR|FILE|ARCHIVE 'file_uri' [, JAR|FILE|ARCHIVE 'file_uri'] ];

• OR REPLACE
  If specified, the resources for the function are reloaded. This is mainly useful to pick up any changes made to the implementation of the function. This parameter is mutually exclusive to IF NOT EXISTS and can not be specified together.

Issue Links

• links to: GitHub Pull Request #3360