[−][src]Struct c3p0_pool_sqlite::rusqlite::Rows
An handle for the resulting rows of a query.
Methods
impl<'stmt> Rows<'stmt>
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pub fn next(&mut self) -> Result<Option<&Row<'stmt>>, Error>
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Attempt to get the next row from the query. Returns Ok(Some(Row))
if
there is another row, Err(...)
if there was an error
getting the next row, and Ok(None)
if all rows have been retrieved.
Note
This interface is not compatible with Rust's Iterator
trait, because
the lifetime of the returned row is tied to the lifetime of self
.
This is a fallible "streaming iterator". For a more natural interface,
consider using query_map
or query_and_then
instead, which
return types that implement Iterator
.
pub fn map<F, B>(self, f: F) -> Map<'stmt, F> where
F: FnMut(&Row) -> Result<B, Error>,
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F: FnMut(&Row) -> Result<B, Error>,
Trait Implementations
impl<'stmt> FallibleStreamingIterator for Rows<'stmt>
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type Error = Error
The error type of iteration.
type Item = Row<'stmt>
The type being iterated over.
fn advance(&mut self) -> Result<(), Error>
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fn get(&self) -> Option<&Row<'stmt>>
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fn next(&mut self) -> Result<Option<&Self::Item>, Self::Error>
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Advances the iterator, returning the next element. Read more
fn size_hint(&self) -> (usize, Option<usize>)
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Returns bounds on the number of remaining elements in the iterator.
fn all<F>(&mut self, f: F) -> Result<bool, Self::Error> where
F: FnMut(&Self::Item) -> bool,
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F: FnMut(&Self::Item) -> bool,
Determines if all elements of the iterator satisfy a predicate.
fn any<F>(&mut self, f: F) -> Result<bool, Self::Error> where
F: FnMut(&Self::Item) -> bool,
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F: FnMut(&Self::Item) -> bool,
Determines if any elements of the iterator satisfy a predicate.
fn by_ref(&mut self) -> &mut Self
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Borrows an iterator, rather than consuming it. Read more
fn count(self) -> Result<usize, Self::Error>
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Returns the number of remaining elements in the iterator.
fn filter<F>(self, f: F) -> Filter<Self, F> where
F: FnMut(&Self::Item) -> bool,
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F: FnMut(&Self::Item) -> bool,
Returns an iterator which filters elements by a predicate.
fn find<F>(&mut self, f: F) -> Result<Option<&Self::Item>, Self::Error> where
F: FnMut(&Self::Item) -> bool,
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F: FnMut(&Self::Item) -> bool,
Returns the first element of the iterator which satisfies a predicate.
fn for_each<F>(self, f: F) -> Result<(), Self::Error> where
F: FnMut(&Self::Item),
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F: FnMut(&Self::Item),
Calls a closure on each element of an iterator.
fn fuse(self) -> Fuse<Self>
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Returns an iterator which is well-behaved at the beginning and end of iteration.
fn map<F, B>(self, f: F) -> Map<Self, F, B> where
F: FnMut(&Self::Item) -> B,
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F: FnMut(&Self::Item) -> B,
Returns an iterator which applies a transform to elements.
fn map_ref<F, B>(self, f: F) -> MapRef<Self, F> where
B: ?Sized,
F: Fn(&Self::Item) -> &B,
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B: ?Sized,
F: Fn(&Self::Item) -> &B,
Returns an iterator which applies a transform to elements. Read more
fn map_err<F, B>(self, f: F) -> MapErr<Self, F> where
F: Fn(Self::Error) -> B,
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F: Fn(Self::Error) -> B,
Returns an iterator that applies a transform to errors.
fn nth(&mut self, n: usize) -> Result<Option<&Self::Item>, Self::Error>
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Returns the nth
element of the iterator.
fn position<F>(&mut self, f: F) -> Result<Option<usize>, Self::Error> where
F: FnMut(&Self::Item) -> bool,
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F: FnMut(&Self::Item) -> bool,
Returns the position of the first element matching a predicate.
fn skip(self, n: usize) -> Skip<Self>
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Returns an iterator which skips the first n
elements.
fn skip_while<F>(self, f: F) -> SkipWhile<Self, F> where
F: FnMut(&Self::Item) -> bool,
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F: FnMut(&Self::Item) -> bool,
Returns an iterator which skips the first sequence of elements matching a predicate.
fn take(self, n: usize) -> Take<Self>
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Returns an iterator which only returns the first n
elements.
fn take_while<F>(self, f: F) -> TakeWhile<Self, F> where
F: FnMut(&Self::Item) -> bool,
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F: FnMut(&Self::Item) -> bool,
Returns an iterator which only returns the first sequence of elements matching a predicate.
impl<'_> Drop for Rows<'_>
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Auto Trait Implementations
impl<'stmt> !Send for Rows<'stmt>
impl<'stmt> Unpin for Rows<'stmt>
impl<'stmt> !Sync for Rows<'stmt>
impl<'stmt> !UnwindSafe for Rows<'stmt>
impl<'stmt> !RefUnwindSafe for Rows<'stmt>
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,