lance 0.1.4

A columnar data format that is 100x faster than Parquet for random access.
Documentation 
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

//! Secondary Index
//!

use std::any::Any;

use async_trait::async_trait;

/// Protobuf definitions for the index on-disk format.
#[allow(clippy::all)]
pub mod pb {
    include!(concat!(env!("OUT_DIR"), "/lance.index.pb.rs"));
}

pub mod vector;

use crate::Result;

/// Index Type
pub enum IndexType {
    // Preserve 0-100 for simple indices.

    // 100+ and up for vector index.
    /// Flat vector index.
    Vector = 100,
}

/// Builds index.
#[async_trait]
pub trait IndexBuilder {
    fn index_type() -> IndexType;

    async fn build(&self) -> Result<()>;
}

pub trait IndexParams {
    fn as_any(&self) -> &dyn Any;
}