[IMPALA-11664] Add support for row-level modifications for Iceberg tables.

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Backend, Frontend
• Labels: impala-iceberg
• Epic Link: Iceberg V2 format
• Epic Color: ghx-label-5
• Assignee: Unassigned
• Reporter: Zoltán Borók-Nagy
• Created: 17/Oct/22 12:52
• Updated: 17/Oct/22 12:53

Description

Add support for row-level modifications for Iceberg tables:

• DELETE STATEMENT
• UPDATE STATEMENT
• UPSERT/MERGE STATEMENT

At first we should support "merge-on-read" write mode with position delete files.