Struct AsyncPreparedStatement 

pub struct AsyncPreparedStatement { /* private fields */ }

An async prepared statement.

Represents a server-side prepared statement that can be executed multiple times with different parameters. Auto-closes on Drop via a best-effort tokio::spawn task — if no tokio runtime is available at drop time we log a warning and flag the connection desynchronized rather than silently leaking the server-side statement slot.

For callers who need confirmed close with error propagation, use AsyncPreparedStatement::close (explicit async close).

Implementations

impl AsyncPreparedStatement

pub fn name(&self) -> &str

Returns the statement name.

pub fn query(&self) -> &str

Returns the original query.

pub fn param_types(&self) -> &[Oid]

Returns the parameter types.

pub fn param_count(&self) -> usize

Returns the number of parameters.

pub fn columns(&self) -> &[Column]

Returns the result column descriptions.

pub fn column_count(&self) -> usize

Returns the number of result columns.

pub async fn close(self, client: &AsyncClient) -> Result<()>

Explicitly closes the prepared statement on the server (async).

Consumes the statement — no further execute_prepared / execute_prepared_streaming calls are possible — and suppresses the Drop-path auto-close. Returns the close_statement result so callers can observe any transport errors.

If you don’t need error propagation, simply dropping the statement has the same effect (best-effort auto-close via tokio::spawn).

Errors

Propagates any error from AsyncClient::close_statement — unhealthy connection, server-side error during Close/Sync, or transport failure.

Trait Implementations

impl Debug for AsyncPreparedStatement

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for AsyncPreparedStatement

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.