Struct BatchValuesFromIterator

pub struct BatchValuesFromIterator<'sr, IT> { /* private fields */ }

Implements BatchValues from an Iterator over references to things that implement SerializeRow

This is to avoid requiring allocating a new Vec containing all the SerializeRows directly: with this, one can write: session.batch(&batch, BatchValuesFromIter::from(lines_to_insert.iter().map(|l| &l.value_list))) where lines_to_insert may also contain e.g. data to pick the statement…

The underlying iterator will always be cloned at least once, once to compute the length if it can’t be known in advance, and be re-cloned at every retry. It is consequently expected that the provided iterator is cheap to clone (e.g. slice.iter().map(...)).

Implementations

impl<'sr, IT, SR> BatchValuesFromIterator<'sr, IT>

where IT: Iterator<Item = &'sr SR> + Clone, SR: SerializeRow + 'sr,

pub fn new(into_iter: impl IntoIterator<IntoIter = IT>) -> Self

Creates a new `BatchValuesFromIter`` object.

Trait Implementations

impl<'sr, IT, SR> BatchValues for BatchValuesFromIterator<'sr, IT>

where IT: Iterator<Item = &'sr SR> + Clone, SR: SerializeRow + 'sr,

type BatchValuesIter<'r> = BatchValuesIteratorFromIterator<IT> where Self: 'r

An Iterator-like object over the values from the parent BatchValues object.

fn batch_values_iter(&self) -> Self::BatchValuesIter<'_>

Returns an iterator over the data contained in this object.

impl<'sr, IT, SR> From<IT> for BatchValuesFromIterator<'sr, IT>

where IT: Iterator<Item = &'sr SR> + Clone, SR: SerializeRow + 'sr,

fn from(it: IT) -> Self

Converts to this type from the input type.