Rust Connector

Note that the rust connector is under active development and the APIs will changes a lot between versions. But we promise to ensure backward compatibility after version 1.0 .

Thanks @songtianyi for libtdengine - a rust bindings project for TDengine. It's an new design for TDengine rust client based on C interface or the REST API. It'll will provide Rust-like APIs and all rust things (like async/stream/iterators and others).

Dependencies

• Rust of course.

if you use the default features, it'll depend on:

• TDengine Client library and headers.
• clang because bindgen will requires the clang AST library.

Features

In-design features:

• API for both C interface
• REST API support by feature rest.
• r2d2 Pool support by feature r2d2
• Iterators for fields fetching
• Stream support
• Subscribe support

Build and test

cargo build
cargo test

test will use default TDengine user and password on localhost (TDengine default).

Set variables if it's not default:

• TEST_TAOS_IP
• TEST_TAOS_PORT
• TEST_TAOS_USER
• TEST_TAOS_PASS
• TEST_TAOS_DB

Usage

For default C-based client API, set in Cargo.toml

[dependencies]
libtaos = "v0.3.8"

For r2d2 support:

[dependencies]
libtaos = { version = "*", features = ["r2d2"] }

For REST client:

[dependencies]
libtaos = { version = "*", features = ["rest"] }

There's a demo app in examples directory, looks like this:

// ...
#[tokio::main]
async fn main() -> Result<(), Error> {
    init();
    let taos = taos_connect()?;

    assert_eq!(
        taos.query("drop database if exists demo").await.is_ok(),
        true
    );
    assert_eq!(taos.query("create database demo").await.is_ok(), true);
    assert_eq!(taos.query("use demo").await.is_ok(), true);
    assert_eq!(
        taos.query("create table m1 (ts timestamp, speed int)")
            .await
            .is_ok(),
        true
    );

    for i in 0..10i32 {
        assert_eq!(
            taos.query(format!("insert into m1 values (now+{}s, {})", i, i).as_str())
                .await
                .is_ok(),
            true
        );
    }
    let rows = taos.query("select * from m1").await?;

    println!("{}", rows.column_meta.into_iter().map(|col| col.name).join(","));
    for row in rows.rows {
        println!("{}", row.into_iter().join(","));
    }
    Ok(())
}

You can check out the experimental bailongma-rs - a TDengine adapters for prometheus written with Rust - as a more productive code example.