reifydb-store-column 0.4.6

Column-oriented storage for analytical queries in ReifyDB
Documentation 
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// SPDX-License-Identifier: Apache-2.0
// Copyright (c) 2025 ReifyDB

#![cfg_attr(not(debug_assertions), deny(warnings))]

pub mod backend;
pub mod config;
pub mod memory;
pub mod partition;
pub mod statistics;
pub mod store;

use partition::{Partition, PartitionKey};
use reifydb_core::common::CommitVersion;

pub mod memory_backend {}

use reifydb_core::{
	interface::version::{ComponentType, HasVersion, SystemVersion},
	value::column::{
		compressed::{CompressedColumn, CompressionType},
		data::ColumnData,
	},
};
use reifydb_type::{Result, value::Value};

pub struct StoreColumnVersion;

impl HasVersion for StoreColumnVersion {
	fn version(&self) -> SystemVersion {
		SystemVersion {
			name: env!("CARGO_PKG_NAME")
				.strip_prefix("reifydb-")
				.unwrap_or(env!("CARGO_PKG_NAME"))
				.to_string(),
			version: env!("CARGO_PKG_VERSION").to_string(),
			description: "Column-oriented storage for analytical queries".to_string(),
			r#type: ComponentType::Module,
		}
	}
}

/// Trait for columnar storage backends
pub trait ColumnStore: Send + Sync + Clone + 'static {
	fn insert(&self, version: CommitVersion, columns: Vec<CompressedColumn>) -> Result<()>;

	fn scan(&self, version: CommitVersion, column_indices: &[usize]) -> Result<Vec<ColumnData>>;

	fn statistics(&self, column_index: usize) -> Option<ColumnStatistics>;

	fn partition_count(&self) -> usize;

	fn compressed_size(&self) -> usize;

	fn uncompressed_size(&self) -> usize;
}

#[derive(Clone, Debug)]
pub struct ColumnStatistics {
	pub min_value: Option<Value>,
	pub max_value: Option<Value>,
	pub none_count: usize,
	pub distinct_count: Option<usize>,
	pub compression_type: CompressionType,
	pub compression_ratio: f64,
	pub compressed_size: usize,
	pub uncompressed_size: usize,
}