feat: Any plans for supporting Multi-column TopK in VBASE mode?

[chinyajie]

I've noticed that both VectorChord and pgvecto.rs support the VBASE method, which performs exceptionally well in "Single-Vector TopK + Filter + Join" scenarios. However, in our application, we need to perform joint TopK searches across multiple vector columns (Multi-column TopK).

Questions
Does VectorChord currently support Multi-column TopK VBASE functionality?
If not, are there any plans to add this feature in future releases?

Thank you for developing VectorChord, such an excellent PostgreSQL vector search extension.

[VoVAllen]

Not yet. Can you share any specific use case for multi column topk?