VectorStore filter improve

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#3,739 opened on Jul 3, 2025 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 5/5
Estimated time: Over a week
Newbie friendliness: 35/100

Issue type: Feature
Clarity: Mostly clear
Activity status: Stale
Tech stack: java
Domain: databases

Research direction

Start with Filter.java and trace how ExpressionType is consumed by the filter system and vector store implementations. Define completion as allowing implementations such as Milvus to provide custom operations like json_contains_any while preserving the existing operations and their current behavior.

Written by the indexing model from the issue text.

Description

enhancement milvus vector store

in my case, i use milvus and want to use json_contains_any

Proposal: Make ExpressionType an Interface for Extensibility

Problem

The current implementation of ExpressionType in Filter.java is an enum with fixed operation types (AND, OR, EQ, NE, etc.). This limits the ability of vector store implementations to support custom operation types that might be specific to their underlying storage systems.

Current Implementation

public enum ExpressionType {
    AND, OR, EQ, NE, GT, GTE, LT, LTE, IN, NIN, NOT
}

Proposed Solution

Convert ExpressionType from an enum to an interface, allowing different vector store implementations to define their own operation types. This would make the filter system more flexible and extensible.

Dominant language: Java
Stars: 9.5k
Forks: 2.9k
Avg merge: 1d 10h
Merged PRs (30d): 5

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