mirror of
https://github.com/fluencelabs/sqlite-wasm-connector
synced 2025-03-15 14:30:49 +00:00
2.8 KiB
2.8 KiB
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
- Fork the project.
- Implement your idea.
- Open a pull request.