[HIVE-28275] Iceberg: Add support for 'If Not Exists" and 'or Replace' for Create Tag

• 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 21:43
• Updated: 26/Jun/24 10:46
• Resolved: 26/Jun/24 10:46

Description

Add support for If not exists and Or Replace while creating Tags

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

-- CREATE historical-tag at current snapshot with default retention or REPLACE it if it already exists.
ALTER TABLE prod.db.sample CREATE OR REPLACE TAG `historical-tag`

Like Spark:

https://iceberg.apache.org/docs/1.5.1/spark-ddl/#alter-table-create-branch

Issue Links

• links to: GitHub Pull Request #5317