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Cell

Enum Cell 

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pub enum Cell {
    Null,
    Bool(bool),
    Int(i64),
    Uint(u64),
    Float(f64),
    Text(String),
    Bytes(Vec<u8>),
    Timestamp(DateTime<Utc>),
    Date(NaiveDate),
}
Expand description

One cell’s value.

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Null

SQL NULL, or a column the driver did not return.

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Bool(bool)

A boolean.

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Int(i64)

A signed integer.

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Uint(u64)

An unsigned integer.

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Float(f64)

A floating-point number.

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Text(String)

Text.

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Bytes(Vec<u8>)

Binary.

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Timestamp(DateTime<Utc>)

A UTC timestamp.

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Date(NaiveDate)

A calendar date.

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impl Cell

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pub fn as_u64(&self) -> Option<u64>

The cell as an unsigned count, for a COUNT(*) column.

A driver may report the count as signed or unsigned depending on the engine; a negative one is impossible, so it clamps rather than failing.

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pub fn to_value(&self) -> Option<Value>

The cell as a bindable Value, for feeding one query’s output into the next — reading a pivot, then the rows it points at.

Null is None: a NULL key links nothing, and binding it would make IN (NULL) match no row while looking like it might.

Trait Implementations§

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impl Clone for Cell

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for Cell

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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 From<&str> for Cell

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fn from(value: &str) -> Self

Converts to this type from the input type.
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impl From<DateTime<Utc>> for Cell

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fn from(value: DateTime<Utc>) -> Self

Converts to this type from the input type.
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impl From<NaiveDate> for Cell

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fn from(value: NaiveDate) -> Self

Converts to this type from the input type.
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impl<T: Into<Cell>> From<Option<T>> for Cell

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fn from(value: Option<T>) -> Self

Converts to this type from the input type.
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impl From<String> for Cell

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fn from(value: String) -> Self

Converts to this type from the input type.
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impl From<Vec<u8>> for Cell

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fn from(value: Vec<u8>) -> Self

Converts to this type from the input type.
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impl From<bool> for Cell

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fn from(value: bool) -> Self

Converts to this type from the input type.
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impl From<f64> for Cell

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fn from(value: f64) -> Self

Converts to this type from the input type.
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impl From<i32> for Cell

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fn from(value: i32) -> Self

Converts to this type from the input type.
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impl From<i64> for Cell

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fn from(value: i64) -> Self

Converts to this type from the input type.
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impl From<u32> for Cell

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fn from(value: u32) -> Self

Converts to this type from the input type.
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impl From<u64> for Cell

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fn from(value: u64) -> Self

Converts to this type from the input type.
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impl PartialEq for Cell

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fn eq(&self, other: &Self) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for Cell

Auto Trait Implementations§

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impl Freeze for Cell

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impl RefUnwindSafe for Cell

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impl Send for Cell

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impl Sync for Cell

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impl Unpin for Cell

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impl UnsafeUnpin for Cell

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impl UnwindSafe for Cell

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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> Event for T
where T: Send + Sync + 'static,

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fn event_name() -> &'static str
where Self: Sized,

A human-readable name, used by wildcard listeners and log output. Always the Rust type path; see the trait docs.
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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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = !

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

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.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more