[CASSANDRA-18640] Add vector similarity functions

• Type: New Feature
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 5.0-alpha1, 5.0
• Component/s: CQL/Semantics
• Epic Link: CEP-30 ANN Vector Search with SAI
• Change Category: Semantic
• Complexity: Normal
• Platform: All

Source Control Link

https://github.com/apache/cassandra/commit/5a82c04fd363030d712fb2935b6c591577ba25ec

Test and Documentation Plan

A new VectorFctsTest adds tests for the new functions.

• Assignee: Andres de la Peña
• Reporter: Andres de la Peña

Authors

Andres de la Peña

Reviewers

Ekaterina Dimitrova, Maxwell Guo

• Created: 29/Jun/23 17:46
• Updated: 12/Sep/23 13:02
• Resolved: 28/Jul/23 14:53

Description

Add the CQL vector similarity functions described by CEP-30:

• similarity_cosine
• similarity_euclidean
• similarity_dot_product

The three functions take two vectors of floats of the same dimensions and return a float indicating the similarity score for the vectors.

Issue Links

• is blocked by: CASSANDRA-18255 Drop JDK8 Support
• links to: GitHub Pull Request #2459