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StatementColumns

Struct StatementColumns 

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pub struct StatementColumns<'c, 's>
where 'c: 's,
{ /* private fields */ }
Expand description

Inspect the columns that a Statement will return.

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impl<'c, 's> StatementColumns<'c, 's>
where 'c: 's,

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pub fn name(&self, column: ColumnIndex) -> Option<&str>

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pub fn index(&self, name: impl AsRef<str>) -> Option<ColumnIndex>

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pub fn iter(&self) -> impl Iterator<Item = ColumnIndex>

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pub fn len(&self) -> usize

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pub fn is_empty(&self) -> bool

Trait Implementations§

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impl<'c, 's> Debug for StatementColumns<'c, 's>
where 'c: 's,

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

Formats the value using the given formatter. Read more
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impl<'c, 's> IntoIterator for StatementColumns<'c, 's>
where 'c: 's,

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type Item = ColumnIndex

The type of the elements being iterated over.
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type IntoIter = StatementColumnIter

Which kind of iterator are we turning this into?
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fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more

Auto Trait Implementations§

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impl<'c, 's> Freeze for StatementColumns<'c, 's>

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impl<'c, 's> RefUnwindSafe for StatementColumns<'c, 's>

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impl<'c, 's> Send for StatementColumns<'c, 's>

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impl<'c, 's> Sync for StatementColumns<'c, 's>

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impl<'c, 's> Unpin for StatementColumns<'c, 's>

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impl<'c, 's> UnsafeUnpin for StatementColumns<'c, 's>

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impl<'c, 's> UnwindSafe for StatementColumns<'c, 's>

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.