Struct CollectHandler 

pub struct CollectHandler<T> { /* private fields */ }

Handler that collects typed rows.

Example

let mut handler: CollectHandler<(i32, String)> = CollectHandler::new();
conn.query("SELECT id, name FROM users", &mut handler)?;
for (id, name) in handler.into_rows() {
    println!("{}: {}", id, name);
}

Implementations

impl<T> CollectHandler<T>

pub fn new() -> Self

Create a new collect handler.

pub fn rows(&self) -> &[T]

Get collected rows.

pub fn into_rows(self) -> Vec<T>

Take collected rows.

pub fn len(&self) -> usize

Get the number of collected rows.

pub fn is_empty(&self) -> bool

Check if no rows were collected.

Trait Implementations

impl<T: Default> Default for CollectHandler<T>

fn default() -> CollectHandler<T>

Returns the “default value” for a type.

impl<T: for<'a> FromRow<'a>> ExtendedHandler for CollectHandler<T>

fn row(&mut self, cols: RowDescription<'_>, row: DataRow<'_>) -> Result<()>

Called for each data row.

fn result_start(&mut self, cols: RowDescription<'_>) -> Result<()>

Called when a result set begins.

fn result_end(&mut self, complete: CommandComplete<'_>) -> Result<()>

Called when a result set ends.

impl<T: for<'a> FromRow<'a>> SimpleHandler for CollectHandler<T>

fn row(&mut self, cols: RowDescription<'_>, row: DataRow<'_>) -> Result<()>

Called for each data row.

fn result_start(&mut self, cols: RowDescription<'_>) -> Result<()>

Called when a result set begins.

fn result_end(&mut self, complete: CommandComplete<'_>) -> Result<()>

Called when a result set ends.