MultiResultStream

Struct MultiResultStream 

Source
pub struct MultiResultStream<'a> { /* private fields */ }
Expand description

Multiple result sets from a batch or stored procedure.

Some queries return multiple result sets (e.g., stored procedures with multiple SELECT statements, or batches with multiple queries).

§Example

// Execute a batch with multiple SELECTs
let mut results = client.query_multiple("SELECT 1 AS a; SELECT 2 AS b, 3 AS c;", &[]).await?;

// Process first result set
while let Some(row) = results.next_row().await? {
    println!("Result 1: {:?}", row);
}

// Move to second result set
if results.next_result().await? {
    while let Some(row) = results.next_row().await? {
        println!("Result 2: {:?}", row);
    }
}

Implementations§

Source§

impl<'a> MultiResultStream<'a>

Source

pub fn current_result_index(&self) -> usize

Get the current result set index (0-based).

Source

pub fn result_count(&self) -> usize

Get the total number of result sets.

Source

pub fn has_more_results(&self) -> bool

Check if there are more result sets after the current one.

Source

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

Get the column metadata for the current result set.

Returns None if there are no result sets or we’ve moved past all of them.

Source

pub async fn next_result(&mut self) -> Result<bool, Error>

Move to the next result set.

Returns true if there is another result set, false if no more.

Source

pub async fn next_row(&mut self) -> Result<Option<Row>, Error>

Get the next row from the current result set.

Returns None when no more rows in the current result set. Call next_result() to move to the next result set.

Source

pub fn current_result_set(&mut self) -> Option<&mut ResultSet>

Get a mutable reference to the current result set.

Source

pub fn collect_current(&mut self) -> Vec<Row>

Collect all rows from the current result set.

Source

pub fn into_query_streams(self) -> Vec<QueryStream<'a>>

Consume the stream and return all result sets as QueryStreams.

Auto Trait Implementations§

§

impl<'a> Freeze for MultiResultStream<'a>

§

impl<'a> RefUnwindSafe for MultiResultStream<'a>

§

impl<'a> Send for MultiResultStream<'a>

§

impl<'a> Sync for MultiResultStream<'a>

§

impl<'a> Unpin for MultiResultStream<'a>

§

impl<'a> UnwindSafe for MultiResultStream<'a>

Blanket Implementations§

Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

impl<T> Instrument for T

Source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
Source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = Infallible

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
Source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
Source§

impl<T> WithSubscriber for T

Source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
Source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more