Struct mimerrust::Row

pub struct Row { /* private fields */ }

Represents a row in a result set.

Implementations

impl Row

pub fn get_type(&self, idx: i16) -> Result<MimerDatatype<'_>, i32>

Gets the content from a specified index and returns a MimerDataType if successful.

Errors

Returns Err when the column type couldn’t be determined.

Examples

let mut conn = Connection::open(db, ident, pass).unwrap();
let stmnt = conn.prepare("SELECT * FROM test_table", CursorMode::Forward).unwrap();
let mut cursor = stmnt.open_cursor().unwrap();

let row = cursor.next_row().unwrap().expect("Nothing was found on this row");
let data_type = row.get_type(1).unwrap();

pub fn get<T: FromSql>(&self, idx: i16) -> Result<Option<T>, i32>

Gets the content from a specified index in a row using polymorphism. Returns a Result of either Ok<Option<T>> or Err<i32> where T is the type specified and i32 is the error code. If a null value is fetched, the return value will be Ok<None>.

Errors

Returns Err when conversion to the specified type fails.

Examples

let mut conn = Connection::open(db, ident, pass).unwrap();
let stmnt = conn.prepare("SELECT * FROM test_table", CursorMode::Forward).unwrap();
let mut cursor = stmnt.open_cursor().unwrap();

let row = cursor.next_row().unwrap().unwrap();
let str:String = row.get(1).unwrap().unwrap();

pub fn is_null(&self, idx: i16) -> Result<bool, i32>

Checks if the value at the specified index is null.

Examples

let mut conn = Connection::open(db, ident, pass).unwrap();
let stmnt = conn.prepare("INSERT INTO test_table (column_1) VALUES(?)", CursorMode::Forward).unwrap();

stmnt.execute_bind(&[&None::<String>]).unwrap(); // insert a null value
stmnt.execute_bind(&[&Some("Hello, World!".to_string())]).unwrap(); // insert a value that is not null

let stmnt = conn.prepare("SELECT * FROM test_table", CursorMode::Forward).unwrap();
let mut cursor = stmnt.open_cursor().unwrap();

let mut row = cursor.next_row().unwrap().unwrap();
assert!(row.is_null(1).unwrap()); // assert that the first value is null

row = cursor.next_row().unwrap().unwrap();
assert!(!row.is_null(1).unwrap()); // assert that the second value is not null

Trait Implementations

impl Clone for Row

fn clone(&self) -> Row

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.