[HIVE-28274] Iceberg: Add support for 'If Not Exists' and 'or Replace' for Create Branch

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.1.0
• Labels: pull-request-available
• Assignee: Ayush Saxena
• Reporter: Ayush Saxena
• Created: 22/May/24 21:42
• Updated: 27/May/24 08:06
• Resolved: 27/May/24 08:06

Description

Add support for 

-- CREATE audit-branch at current snapshot with default retention if it doesn't exist.
ALTER TABLE prod.db.sample CREATE BRANCH IF NOT EXISTS `audit-branch`

-- CREATE audit-branch at current snapshot with default retention or REPLACE it if it already exists.
ALTER TABLE prod.db.sample CREATE OR REPLACE BRANCH `audit-branch`

Like Spark:

https://iceberg.apache.org/docs/1.5.1/spark-ddl/#branching-and-tagging-ddl

Issue Links

• links to: GitHub Pull Request #5259