databend-driver

Crates.iodatabend-driver
lib.rsdatabend-driver
version
sourcesrc
created_at2023-03-29 10:03:02.397463
updated_at2024-12-10 01:10:10.089301
descriptionDatabend Driver for Rust
homepage
repositoryhttps://github.com/databendlabs/bendsql
max_upload_size
id823970
Cargo.toml error:TOML parse error at line 18, column 1 | 18 | autolib = false | ^^^^^^^ unknown field `autolib`, expected one of `name`, `version`, `edition`, `authors`, `description`, `readme`, `license`, `repository`, `homepage`, `documentation`, `build`, `resolver`, `links`, `default-run`, `default_dash_run`, `rust-version`, `rust_dash_version`, `rust_version`, `license-file`, `license_dash_file`, `license_file`, `licenseFile`, `license_capital_file`, `forced-target`, `forced_dash_target`, `autobins`, `autotests`, `autoexamples`, `autobenches`, `publish`, `metadata`, `keywords`, `categories`, `exclude`, `include`
size0
everpcpc (everpcpc)

documentation

README

Databend Driver

Databend unified SQL client for RestAPI and FlightSQL

crates.io License

usage

exec

use databend_driver::Client;

let dsn = "databend://root:@localhost:8000/default?sslmode=disable".to_string();
let client = Client::new(dsn);
let conn = client.get_conn().await.unwrap();

let sql_create = "CREATE TABLE books (
    title VARCHAR,
    author VARCHAR,
    date Date
);";
conn.exec(sql_create).await.unwrap();
let sql_insert = "INSERT INTO books VALUES ('The Little Prince', 'Antoine de Saint-Exupéry', '1943-04-06');";
conn.exec(sql_insert).await.unwrap();

query row

let row = conn.query_row("SELECT * FROM books;").await.unwrap();
let (title,author,date): (String,String,i32) = row.unwrap().try_into().unwrap();
println!("{} {} {}", title, author, date);

query iter

let mut rows = conn.query_iter("SELECT * FROM books;").await.unwrap();
while let Some(row) = rows.next().await {
    let (title,author,date): (String,String,chrono::NaiveDate) = row.unwrap().try_into().unwrap();
    println!("{} {} {}", title, author, date);
}

Type Mapping

Databend Types

General Data Types

Databend Rust
BOOLEAN bool
TINYINT i8,u8
SMALLINT i16,u16
INT i32,u32
BIGINT i64,u64
FLOAT f32
DOUBLE f64
DECIMAL String
DATE chrono::NaiveDate
TIMESTAMP chrono::NaiveDateTime
VARCHAR String
BINARY Vec<u8>

Semi-Structured Data Types

Databend Rust
ARRAY[T] Vec<T>
TUPLE[T, U] (T, U)
MAP[K, V] HashMap<K, V>
VARIANT String
BITMAP String
GEOMETRY String
GEOGRAPHY String

Note: VARIANT is a json encoded string. Example:

CREATE TABLE example (
    data VARIANT
);
INSERT INTO example VALUES ('{"a": 1, "b": "hello"}');

let row = conn.query_row("SELECT * FROM example limit 1;").await.unwrap();
let (data,): (String,) = row.unwrap().try_into().unwrap();
let value: serde_json::Value = serde_json::from_str(&data).unwrap();
println!("{:?}", value);
Commit count: 429

cargo fmt