sqlite-wasm-connector/README.md

SQLite

The package provides an interface to SQLite.

Documentation

Example

Create a table, insert a couple of rows, and fetch one:

let connection = sqlite::open(":memory:").unwrap();

connection.execute("
    CREATE TABLE users (name TEXT, age INTEGER);
    INSERT INTO users (name, age) VALUES ('Alice', 42);
    INSERT INTO users (name, age) VALUES ('Bob', 69);
").unwrap();

connection.iterate("SELECT * FROM users WHERE age > 50", |pairs| {
    for &(column, value) in pairs.iter() {
        println!("{} = {}", column, value.unwrap());
    }
    true
}).unwrap();

The same example using prepared statements:

use sqlite::State;

let connection = sqlite::open(":memory:").unwrap();

connection.execute("
    CREATE TABLE users (name TEXT, age INTEGER)
").unwrap();

let mut statement = connection.prepare("
    INSERT INTO users (name, age) VALUES (?, ?)
").unwrap();

statement.bind(1, "Alice").unwrap();
statement.bind(2, 42).unwrap();
assert_eq!(statement.next().unwrap(), State::Done);

statement.reset().unwrap();

statement.bind(1, "Bob").unwrap();
statement.bind(2, 69).unwrap();
assert_eq!(statement.next().unwrap(), State::Done);

let mut statement = connection.prepare("
    SELECT * FROM users WHERE age > 50
").unwrap();

while let State::Row = statement.next().unwrap() {
    println!("name = {}", statement.read::<String>(0).unwrap());
    println!("age = {}", statement.read::<i64>(1).unwrap());
}

The same example using cursors:

use sqlite::Value;

let connection = sqlite::open(":memory:").unwrap();

connection.execute("
    CREATE TABLE users (name TEXT, age INTEGER)
").unwrap();

let mut cursor = connection.prepare("
    INSERT INTO users (name, age) VALUES (?, ?)
").unwrap().cursor().unwrap();

cursor.bind(&[
    Value::String("Alice".to_string()), Value::Integer(42),
]).unwrap();

cursor.bind(&[
    Value::String("Bob".to_string()), Value::Integer(69),
]).unwrap();

let mut cursor = connection.prepare("
    SELECT * FROM users WHERE age > 50
").unwrap().cursor().unwrap();

while let Some(row) = cursor.next().unwrap() {
    match (&row[0], &row[1]) {
        (&Value::String(ref name), &Value::Integer(age)) => {
            println!("name = {}", name);
            println!("age = {}", age);
        },
        _ => unreachable!(),
    }
}

Contributing

1. Fork the project.
2. Implement your idea.
3. Open a pull request.