Struct AppenderParamsFromIter 

pub struct AppenderParamsFromIter<I>(/* private fields */);

Adapter type which allows any iterator over ToSql values to implement AppenderParams.

This struct is created by the appender_params_from_iter function.

This can be useful when the values for one appended row are already stored in a collection or produced by an iterator. It avoids allocating storage for something like a Vec<&dyn ToSql>.

The iterator must yield one concrete item type that implements ToSql. For heterogeneous rows, use a tuple, duckdb::params!, or a &[&dyn ToSql]. As with every Appender::append_row call, the number of values must match the target table’s column count.

Example

use duckdb::{Connection, Result, appender_params_from_iter};

fn append_scores(conn: &Connection, scores: Vec<i32>) -> Result<()> {
    conn.execute_batch("CREATE TABLE scores (a INTEGER, b INTEGER, c INTEGER)")?;
    let mut appender = conn.appender("scores")?;

    appender.append_row(appender_params_from_iter(scores))?;
    appender.flush()
}

Trait Implementations

impl<I> AppenderParams for AppenderParamsFromIter<I>

where I: IntoIterator, I::Item: ToSql,

impl<I: Clone> Clone for AppenderParamsFromIter<I>

fn clone(&self) -> AppenderParamsFromIter<I>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<I: Debug> Debug for AppenderParamsFromIter<I>

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

Formats the value using the given formatter.