[CASSANDRA-19402] Improve SAI index type handling

• Type: Improvement
• Status: Triage Needed
• Priority: Normal
• Resolution: Unresolved
• Component/s: Feature/SAI
• Epic Link: Storage Attached Indexes (Phase 3)
• Platform: All
• Assignee: Unassigned
• Reporter: Mike Adamson
• Created: 15/Feb/24 13:00
• Updated: 15/Feb/24 13:00

Description

There are now 3 different index types supported by SAI :- literal, numeric & vector. These each have different in-memory, on-disk & search requirements.

Currently, the different types are supported using conditional statements throughout the SAI codebase.

It would be better if each index type was represented by a strategy that provided the non-specific SAI code with the support needed to handle the index type.

This would make it far easier to add additional index types in the future.