QueryRowIterator

Struct QueryRowIterator 

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

Streaming query result that yields rows one at a time.

This type enables true streaming output for SELECT queries by applying projection on-the-fly and yielding projected rows through an iterator.

§Example

let mut iter = db.execute_sql_streaming("SELECT * FROM users")?;
while let Some(row) = iter.next_row()? {
    println!("{:?}", row);
}

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impl<'a> QueryRowIterator<'a>

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pub fn new( inner: Box<dyn RowIterator + 'a>, projection: Projection, schema: Vec<ColumnMetadata>, ) -> Self

Create a new streaming query result.

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

Returns column information for the result set.

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pub fn next_row(&mut self) -> Result<Option<Vec<SqlValue>>, ExecutorError>

Advance and return the next projected row, or None if exhausted.

§Errors

Returns an error if reading or projection fails.

Auto Trait Implementations§

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impl<'a> Freeze for QueryRowIterator<'a>

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impl<'a> !RefUnwindSafe for QueryRowIterator<'a>

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impl<'a> !Send for QueryRowIterator<'a>

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impl<'a> !Sync for QueryRowIterator<'a>

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impl<'a> Unpin for QueryRowIterator<'a>

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impl<'a> !UnwindSafe for QueryRowIterator<'a>

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

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impl<T> BorrowMut<T> for T
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